out of range for python 2

Use relative imports

.github/workflows/regression.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Coveralls
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: coveralls --service=github
+        run: coveralls --service=github || true
 
   ubuntu18:
     runs-on: ubuntu-18.04
@@ -49,7 +49,7 @@ jobs:
       - name: Coveralls
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: coveralls --service=github
+        run: coveralls --service=github || true
 
   ubuntu18_python2:
     runs-on: ubuntu-18.04
@@ -73,4 +73,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: coveralls --service=github
+        run: coveralls --service=github || true

README.md

@@ -279,6 +279,8 @@ root@ws1:~# zfs-autobackup test --verbose
 
 This also allows you to make several snapshots during the day, but only backup the data at night when the server is not busy.
 
+**Note**: In this mode it doesnt take a specified target-schedule into account when thinning, it only knows a snapshot is the common snapshot by looking at the holds. So make sure your source-schedule keeps the snapshots you still want to transfer at a later point.
+
 ## Thinning out obsolete snapshots
 
 The thinner is the thing that destroys old snapshots on the source and target.
@@ -619,9 +621,9 @@ optional arguments:
                         multiple times)
   --recv-pipe COMMAND   pipe zfs recv input through COMMAND (can be used
                         multiple times)
-  --compress TYPE       Use compression during transfer, zstd-fast
+  --compress TYPE       Use compression during transfer, defaults to zstd-adapt
-                        recommended. (xz, pigz-slow, zstd-slow, zstd-fast,
+                        if TYPE is not specified. (gzip, pigz-fast, pigz-slow,
-                        lzo, gzip, pigz-fast, lz4)
+                        zstd-fast, zstd-slow, zstd-adapt, xz, lzo, lz4)
   --rate DATARATE       Limit data transfer rate (e.g. 128K. requires
                         mbuffer.)
   --buffer SIZE         Add zfs send and recv buffers to smooth out IO bursts.

tests/test_destroymissing.py

@@ -13,10 +13,10 @@ class TestZfsNode(unittest2.TestCase):
     def  test_destroymissing(self):
 
         #initial backup
-        with patch('time.strftime', return_value="10101111000000"): #1000 years in past
+        with patch('time.strftime', return_value="test-19101111000000"): #1000 years in past
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000000"): #far in past
+        with patch('time.strftime', return_value="test-20101111000000"): #far in past
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds --allow-empty".split(" ")).run())
 
 
@@ -40,7 +40,7 @@ class TestZfsNode(unittest2.TestCase):
 
                 print(buf.getvalue())
                 #should have done the snapshot cleanup for destoy missing:
-                self.assertIn("fs1@test-10101111000000: Destroying", buf.getvalue())
+                self.assertIn("fs1@test-19101111000000: Destroying", buf.getvalue())
 
                 self.assertIn("fs1: Destroy missing: Still has children here.", buf.getvalue())
 
@@ -130,6 +130,6 @@ test_target1/test_source1
 test_target1/test_source2
 test_target1/test_source2/fs2
 test_target1/test_source2/fs2/sub
-test_target1/test_source2/fs2/sub@test-10101111000000
+test_target1/test_source2/fs2/sub@test-19101111000000
 test_target1/test_source2/fs2/sub@test-20101111000000
 """)

tests/test_encryption.py

@@ -48,11 +48,11 @@ class TestZfsEncryption(unittest2.TestCase):
         self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsourcekeyless", unload_key=True) # raw mode shouldn't need a key
         self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --no-snapshot --exclude-received".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --no-snapshot --exclude-received".split(" ")).run())
 
@@ -85,11 +85,11 @@ test_target1/test_source2/fs2/sub                                     encryption
         self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
         self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --decrypt --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --decrypt --no-snapshot --exclude-received".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --decrypt --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --decrypt --no-snapshot --exclude-received".split(" ")).run())
 
@@ -120,11 +120,11 @@ test_target1/test_source2/fs2/sub                              encryptionroot  -
         self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
         self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --encrypt --debug --no-snapshot --exclude-received".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --encrypt --debug --no-snapshot --exclude-received".split(" ")).run())
 
@@ -155,14 +155,14 @@ test_target1/test_source2/fs2/sub                              encryptionroot  -
         self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
         self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup(
                 "test test_target1 --verbose --no-progress --decrypt --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup(
                 "test test_target1/encryptedtarget --verbose --no-progress --decrypt --encrypt --debug --no-snapshot --exclude-received".split(
                     " ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup(
                 "test test_target1 --verbose --no-progress --decrypt --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
             self.assertFalse(ZfsAutobackup(

tests/test_externalfailures.py

@@ -32,7 +32,7 @@ class TestExternalFailures(unittest2.TestCase):
     def test_initial_resume(self):
 
         # inital backup, leaves resume token
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.generate_resume()
 
         # --test should resume and succeed
@@ -81,11 +81,11 @@ test_target1/test_source2/fs2/sub@test-20101111000000
     def test_incremental_resume(self):
 
         # initial backup
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         # incremental backup leaves resume token
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.generate_resume()
 
         # --test should resume and succeed
@@ -138,7 +138,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
             self.skipTest("Resume not supported in this ZFS userspace version")
 
         # inital backup, leaves resume token
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.generate_resume()
 
         # remove corresponding source snapshot, so it becomes invalid
@@ -148,11 +148,11 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         shelltest("zfs destroy test_target1/test_source1/fs1/sub; true")
 
         # --test try again, should abort old resume
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
         # try again, should abort old resume
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all test_target1")
@@ -176,22 +176,22 @@ test_target1/test_source2/fs2/sub@test-20101111000000
             self.skipTest("Resume not supported in this ZFS userspace version")
 
         # initial backup
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         # icremental backup, leaves resume token
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.generate_resume()
 
         # remove corresponding source snapshot, so it becomes invalid
         shelltest("zfs destroy test_source1/fs1@test-20101111000001")
 
         # --test try again, should abort old resume
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
         # try again, should abort old resume
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all test_target1")
@@ -215,17 +215,17 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         if "0.6.5" in ZFS_USERSPACE:
             self.skipTest("Resume not supported in this ZFS userspace version")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         # generate resume
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.generate_resume()
 
         with OutputIO() as buf:
             with redirect_stdout(buf):
                 # incremental, doesnt want previous anymore
-                with patch('time.strftime', return_value="20101111000002"):
+                with patch('time.strftime', return_value="test-20101111000002"):
                     self.assertFalse(ZfsAutobackup(
                         "test test_target1 --no-progress --verbose --keep-target=0 --allow-empty".split(" ")).run())
 
@@ -253,11 +253,11 @@ test_target1/test_source2/fs2/sub@test-20101111000002
         if "0.6.5" in ZFS_USERSPACE:
             self.skipTest("Resume not supported in this ZFS userspace version")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         # generate resume
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.generate_resume()
 
         shelltest("zfs destroy test_source1/fs1@test-20101111000001")
@@ -265,7 +265,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
         with OutputIO() as buf:
             with redirect_stdout(buf):
                 # incremental, doesnt want previous anymore
-                with patch('time.strftime', return_value="20101111000002"):
+                with patch('time.strftime', return_value="test-20101111000002"):
                     self.assertFalse(ZfsAutobackup(
                         "test test_target1 --no-progress --verbose --no-snapshot".split(
                             " ")).run())
@@ -277,14 +277,14 @@ test_target1/test_source2/fs2/sub@test-20101111000002
 
     def test_missing_common(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         # remove common snapshot and leave nothing
         shelltest("zfs release zfs_autobackup:test test_source1/fs1@test-20101111000000")
         shelltest("zfs destroy test_source1/fs1@test-20101111000000")
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
     #UPDATE: offcourse the one thing that wasn't tested had a bug :(  (in ExecuteNode.run()).
@@ -295,7 +295,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
 #         #recreate target pool without any features
 #         # shelltest("zfs set compress=on test_source1; zpool destroy test_target1; zpool create test_target1 -o feature@project_quota=disabled /dev/ram2")
 #
-#         with patch('time.strftime', return_value="20101111000000"):
+#         with patch('time.strftime', return_value="test-20101111000000"):
 #             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --no-progress".split(" ")).run())
 #
 #         r = shelltest("zfs list -H -o name -r -t all test_target1")

tests/test_regressions.py

@@ -11,17 +11,17 @@ class TestZfsNode(unittest2.TestCase):
     def test_keepsource0target10queuedsend(self):
         """Test if thinner doesnt destroy too much early on if there are no common snapshots YET. Issue #84"""
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup(
                 "test test_target1 --no-progress --verbose --keep-source=0 --keep-target=10 --allow-empty --no-send".split(
                     " ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup(
                 "test test_target1 --no-progress --verbose --keep-source=0 --keep-target=10 --allow-empty --no-send".split(
                     " ")).run())
 
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup(
                 "test test_target1 --no-progress --verbose --keep-source=0 --keep-target=10 --allow-empty".split(
                     " ")).run())

tests/test_scaling.py

@@ -33,7 +33,7 @@ class TestZfsScaling(unittest2.TestCase):
         run_counter=0
         with patch.object(ExecuteNode,'run', run_count) as p:
 
-            with patch('time.strftime', return_value="20101112000000"):
+            with patch('time.strftime', return_value="test-20101112000000"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=10000 --keep-target=10000 --no-holds --allow-empty".split(" ")).run())
 
 
@@ -46,7 +46,7 @@ class TestZfsScaling(unittest2.TestCase):
         run_counter=0
         with patch.object(ExecuteNode,'run', run_count) as p:
 
-            with patch('time.strftime', return_value="20101112000001"):
+            with patch('time.strftime', return_value="test-20101112000001"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=10000 --keep-target=10000 --no-holds --allow-empty".split(" ")).run())
 
 
@@ -73,7 +73,7 @@ class TestZfsScaling(unittest2.TestCase):
         run_counter=0
         with patch.object(ExecuteNode,'run', run_count) as p:
 
-            with patch('time.strftime', return_value="20101112000000"):
+            with patch('time.strftime', return_value="test-20101112000000"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds --allow-empty".split(" ")).run())
 
 
@@ -87,7 +87,7 @@ class TestZfsScaling(unittest2.TestCase):
         run_counter=0
         with patch.object(ExecuteNode,'run', run_count) as p:
 
-            with patch('time.strftime', return_value="20101112000001"):
+            with patch('time.strftime', return_value="test-20101112000001"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds --allow-empty".split(" ")).run())
 
 

tests/test_sendrecvpipes.py

@@ -16,25 +16,25 @@ class TestSendRecvPipes(unittest2.TestCase):
 
 
         with self.subTest("local local pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
 
             shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
 
         with self.subTest("remote local pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
 
             shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
 
         with self.subTest("local remote pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-target=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
 
             shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
 
         with self.subTest("remote remote pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--ssh-target=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
 
     def test_compress(self):
@@ -43,7 +43,7 @@ class TestSendRecvPipes(unittest2.TestCase):
         for compress in zfs_autobackup.compressors.COMPRESS_CMDS.keys():
 
             with self.subTest("compress "+compress):
-                with patch('time.strftime', return_value="20101111000000"):
+                with patch('time.strftime', return_value="test-20101111000000"):
                     self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--compress="+compress]).run())
 
                 shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
@@ -53,25 +53,25 @@ class TestSendRecvPipes(unittest2.TestCase):
 
 
         with self.subTest("local local pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--buffer=1M" ]).run())
 
             shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
 
         with self.subTest("remote local pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--buffer=1M"]).run())
 
             shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
 
         with self.subTest("local remote pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-target=localhost", "--buffer=1M"]).run())
 
             shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
 
         with self.subTest("remote remote pipe"):
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--ssh-target=localhost", "--buffer=1M"]).run())
 
     def test_rate(self):
@@ -79,7 +79,7 @@ class TestSendRecvPipes(unittest2.TestCase):
 
 
         start=time.time()
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--rate=50k" ]).run())
 
         #not a great way of verifying but it works.

tests/test_zfsautobackup.py

@@ -33,7 +33,7 @@ class TestZfsAutobackup(unittest2.TestCase):
     def  test_snapshotmode(self):
         """test snapshot tool mode"""
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test --no-progress --verbose".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -57,7 +57,7 @@ test_target1
         with self.subTest("no datasets selected"):
             with OutputIO() as buf:
                 with redirect_stderr(buf):
-                    with patch('time.strftime', return_value="20101111000000"):
+                    with patch('time.strftime', return_value="test-20101111000000"):
                         self.assertTrue(ZfsAutobackup("nonexisting test_target1 --verbose --debug --no-progress".split(" ")).run())
 
                 print(buf.getvalue())
@@ -67,7 +67,7 @@ test_target1
 
         with self.subTest("defaults with full verbose and debug"):
 
-            with patch('time.strftime', return_value="20101111000000"):
+            with patch('time.strftime', return_value="test-20101111000000"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --verbose --debug --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -96,7 +96,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 """)
 
         with self.subTest("bare defaults, allow empty"):
-            with patch('time.strftime', return_value="20101111000001"):
+            with patch('time.strftime', return_value="test-20101111000001"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --no-progress".split(" ")).run())
 
 
@@ -167,14 +167,14 @@ test_target1/test_source2/fs2/sub@test-20101111000001  userrefs  1         -
 
         #make sure time handling is correctly. try to make snapshots a year appart and verify that only snapshots mostly 1y old are kept
         with self.subTest("test time checking"):
-            with patch('time.strftime', return_value="20111111000000"):
+            with patch('time.strftime', return_value="test-20111111000000"):
                 self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --verbose --no-progress".split(" ")).run())
 
 
             time_str="20111112000000" #month in the "future"
             future_timestamp=time_secs=time.mktime(time.strptime(time_str,"%Y%m%d%H%M%S"))
             with patch('time.time', return_value=future_timestamp):
-                with patch('time.strftime', return_value="20111111000001"):
+                with patch('time.strftime', return_value="test-20111111000001"):
                     self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --verbose --keep-source 1y1y --keep-target 1d1y --no-progress".split(" ")).run())
 
 
@@ -214,7 +214,7 @@ test_target1/test_source2/fs2/sub@test-20111111000001
         r=shelltest("zfs snapshot test_source1/fs1@othersimple")
         r=shelltest("zfs snapshot test_source1/fs1@otherdate-20001111000000")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -249,7 +249,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         r=shelltest("zfs snapshot test_source1/fs1@othersimple")
         r=shelltest("zfs snapshot test_source1/fs1@otherdate-20001111000000")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --other-snapshots".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -284,7 +284,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
     def  test_nosnapshot(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -308,7 +308,7 @@ test_target1/test_source2/fs2
 
     def  test_nosend(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-send --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -331,7 +331,7 @@ test_target1
     def  test_ignorereplicated(self):
         r=shelltest("zfs snapshot test_source1/fs1@otherreplication")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --ignore-replicated".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -360,7 +360,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
     def  test_noholds(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds --no-progress".split(" ")).run())
 
             r=shelltest("zfs get -r userrefs test_source1 test_source2 test_target1")
@@ -392,7 +392,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000  userrefs  0         -
 
     def  test_strippath(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --strip-path=1 --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -428,7 +428,7 @@ test_target1/fs2/sub@test-20101111000000
 
         r=shelltest("zfs set refreservation=1M test_source1/fs1")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --clear-refreservation".split(" ")).run())
 
             r=shelltest("zfs get refreservation -r test_source1 test_source2 test_target1")
@@ -466,7 +466,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000  refreservation  -
             self.skipTest("This zfs-userspace version doesnt support -o")
 
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --clear-mountpoint --debug".split(" ")).run())
 
             r=shelltest("zfs get canmount -r test_source1 test_source2 test_target1")
@@ -499,18 +499,18 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
     def  test_rollback(self):
 
         #initial backup
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         #make change
         r=shelltest("zfs mount test_target1/test_source1/fs1")
         r=shelltest("touch /test_target1/test_source1/fs1/change.txt")
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             #should fail (busy)
             self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             #rollback, should succeed
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --rollback".split(" ")).run())
 
@@ -518,14 +518,14 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
     def  test_destroyincompat(self):
 
         #initial backup
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         #add multiple compatible snapshot (written is still 0)
         r=shelltest("zfs snapshot test_target1/test_source1/fs1@compatible1")
         r=shelltest("zfs snapshot test_target1/test_source1/fs1@compatible2")
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             #should be ok, is compatible
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
@@ -535,19 +535,19 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
         r=shelltest("zfs snapshot test_target1/test_source1/fs1@incompatible1")
 
 
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             #--test should fail, now incompatible
             self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --test".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             #should fail, now incompatible
             self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000003"):
+        with patch('time.strftime', return_value="test-20101111000003"):
             #--test should succeed by destroying incompatibles
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --destroy-incompatible --test".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000003"):
+        with patch('time.strftime', return_value="test-20101111000003"):
             #should succeed by destroying incompatibles
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --destroy-incompatible".split(" ")).run())
 
@@ -585,13 +585,13 @@ test_target1/test_source2/fs2/sub@test-20101111000003
 
         #test all ssh directions
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --ssh-source localhost --exclude-received".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --ssh-target localhost --exclude-received".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --ssh-source localhost --ssh-target localhost".split(" ")).run())
 
 
@@ -636,7 +636,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
     def  test_minchange(self):
 
         #initial
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --min-change 100000".split(" ")).run())
 
         #make small change, use umount to reflect the changes immediately
@@ -646,7 +646,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
 
 
         #too small change, takes no snapshots
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --min-change 100000".split(" ")).run())
 
         #make big change
@@ -654,7 +654,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
         r=shelltest("zfs umount test_source1/fs1; zfs mount test_source1/fs1")
 
         #bigger change, should take snapshot
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --min-change 100000".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -687,7 +687,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
     def  test_test(self):
 
         #initial
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -704,12 +704,12 @@ test_target1
 """)
 
         #actual make initial backup
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
 
         #test incremental
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --allow-empty --verbose --test".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -745,7 +745,7 @@ test_target1/test_source2/fs2/sub@test-20101111000001
         shelltest("zfs create test_target1/test_source1")
         shelltest("zfs send  test_source1/fs1@migrate1| zfs recv test_target1/test_source1/fs1")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -778,15 +778,15 @@ test_target1/test_source2/fs2/sub@test-20101111000000
     def test_keep0(self):
         """test if keep-source=0 and keep-target=0 dont delete common snapshot and break backup"""
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=0 --keep-target=0".split(" ")).run())
 
         #make snapshot, shouldnt delete 0
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test --no-progress --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
 
         #make snapshot 2, shouldnt delete 0 since it has holds, but will delete 1 since it has no holds
-        with patch('time.strftime', return_value="20101111000002"):
+        with patch('time.strftime', return_value="test-20101111000002"):
             self.assertFalse(ZfsAutobackup("test --no-progress --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
@@ -818,7 +818,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 """)
 
         #make another backup but with no-holds. we should naturally endup with only number 3
-        with patch('time.strftime', return_value="20101111000003"):
+        with patch('time.strftime', return_value="test-20101111000003"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=0 --keep-target=0 --no-holds --allow-empty".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
@@ -848,7 +848,7 @@ test_target1/test_source2/fs2/sub@test-20101111000003
 
 
         # run with snapshot-only for 4, since we used no-holds, it will delete 3 on the source, breaking the backup
-        with patch('time.strftime', return_value="20101111000004"):
+        with patch('time.strftime', return_value="test-20101111000004"):
             self.assertFalse(ZfsAutobackup("test --no-progress --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
@@ -883,7 +883,7 @@ test_target1/test_source2/fs2/sub@test-20101111000003
         r = shelltest("zfs snapshot test_source1@test")
 
         l=LogConsole(show_verbose=True, show_debug=False, color=False)
-        n=ZfsNode("test",l)
+        n=ZfsNode(snapshot_time_format="bla", hold_name="bla", logger=l)
         d=ZfsDataset(n,"test_source1@test")
 
         sp=d.send_pipe([], prev_snapshot=None, resume_token=None, show_progress=True, raw=False, send_pipes=[], send_properties=True, write_embedded=True, zfs_compressed=True)

tests/test_zfsautobackup31.py

@@ -10,10 +10,10 @@ class TestZfsAutobackup31(unittest2.TestCase):
 
     def test_no_thinning(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --keep-target=0 --keep-source=0 --no-thinning".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -54,10 +54,10 @@ test_target1/test_source2/fs2/sub@test-20101111000001
         shelltest("zfs create test_target1/a")
         shelltest("zfs create test_target1/b")
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(ZfsAutobackup("test test_target1/a --no-progress --verbose --debug".split(" ")).run())
 
-        with patch('time.strftime', return_value="20101111000001"):
+        with patch('time.strftime', return_value="test-20101111000001"):
             self.assertFalse(ZfsAutobackup("test test_target1/b --no-progress --verbose".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t snapshot test_target1")
@@ -75,7 +75,7 @@ test_target1/b/test_target1/a/test_source1/fs1/sub@test-20101111000000
 
     def test_zfs_compressed(self):
 
-        with patch('time.strftime', return_value="20101111000000"):
+        with patch('time.strftime', return_value="test-20101111000000"):
             self.assertFalse(
                 ZfsAutobackup("test test_target1 --no-progress --verbose --debug --zfs-compressed".split(" ")).run())
 

tests/test_zfsnode.py

@@ -12,60 +12,60 @@ class TestZfsNode(unittest2.TestCase):
     def test_consistent_snapshot(self):
         logger = LogStub()
         description = "[Source]"
-        node = ZfsNode("test", logger, description=description)
+        node = ZfsNode(snapshot_time_format="test-%Y%m%d%H%M%S", hold_name="zfs_autobackup:test", logger=logger, description=description)
 
         with self.subTest("first snapshot"):
-            node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-1", 100000)
+            node.consistent_snapshot(node.selected_datasets(property_name="autobackup:test",exclude_paths=[], exclude_received=False, exclude_unchanged=False, min_change=200000), "test-20101111000001", 100000)
             r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
             self.assertEqual(r, """
 test_source1
 test_source1/fs1
-test_source1/fs1@test-1
+test_source1/fs1@test-20101111000001
 test_source1/fs1/sub
-test_source1/fs1/sub@test-1
+test_source1/fs1/sub@test-20101111000001
 test_source2
 test_source2/fs2
 test_source2/fs2/sub
-test_source2/fs2/sub@test-1
+test_source2/fs2/sub@test-20101111000001
 test_source2/fs3
 test_source2/fs3/sub
 test_target1
 """)
 
         with self.subTest("second snapshot, no changes, no snapshot"):
-            node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-2", 1)
+            node.consistent_snapshot(node.selected_datasets(property_name="autobackup:test",exclude_paths=[], exclude_received=False, exclude_unchanged=False, min_change=200000), "test-20101111000002", 1)
             r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
             self.assertEqual(r, """
 test_source1
 test_source1/fs1
-test_source1/fs1@test-1
+test_source1/fs1@test-20101111000001
 test_source1/fs1/sub
-test_source1/fs1/sub@test-1
+test_source1/fs1/sub@test-20101111000001
 test_source2
 test_source2/fs2
 test_source2/fs2/sub
-test_source2/fs2/sub@test-1
+test_source2/fs2/sub@test-20101111000001
 test_source2/fs3
 test_source2/fs3/sub
 test_target1
 """)
 
         with self.subTest("second snapshot, no changes, empty snapshot"):
-            node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-2", 0)
+            node.consistent_snapshot(node.selected_datasets(property_name="autobackup:test", exclude_paths=[], exclude_received=False, exclude_unchanged=False, min_change=200000), "test-20101111000002", 0)
             r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
             self.assertEqual(r, """
 test_source1
 test_source1/fs1
-test_source1/fs1@test-1
+test_source1/fs1@test-20101111000001
-test_source1/fs1@test-2
+test_source1/fs1@test-20101111000002
 test_source1/fs1/sub
-test_source1/fs1/sub@test-1
+test_source1/fs1/sub@test-20101111000001
-test_source1/fs1/sub@test-2
+test_source1/fs1/sub@test-20101111000002
 test_source2
 test_source2/fs2
 test_source2/fs2/sub
-test_source2/fs2/sub@test-1
+test_source2/fs2/sub@test-20101111000001
-test_source2/fs2/sub@test-2
+test_source2/fs2/sub@test-20101111000002
 test_source2/fs3
 test_source2/fs3/sub
 test_target1
@@ -74,12 +74,12 @@ test_target1
     def test_consistent_snapshot_prepostcmds(self):
         logger = LogStub()
         description = "[Source]"
-        node = ZfsNode("test", logger, description=description, debug_output=True)
+        node = ZfsNode(snapshot_time_format="test", hold_name="test", logger=logger, description=description, debug_output=True)
 
         with self.subTest("Test if all cmds are executed correctly (no failures)"):
             with OutputIO() as buf:
                 with redirect_stdout(buf):
-                    node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-1",
+                    node.consistent_snapshot(node.selected_datasets(property_name="autobackup:test", exclude_paths=[], exclude_received=False, exclude_unchanged=False, min_change=1), "test-1",
                                              0,
                                              pre_snapshot_cmds=["echo pre1", "echo pre2"],
                                              post_snapshot_cmds=["echo post1 >&2", "echo post2 >&2"]
@@ -95,7 +95,7 @@ test_target1
             with OutputIO() as buf:
                 with redirect_stdout(buf):
                     with self.assertRaises(ExecuteError):
-                        node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-1",
+                        node.consistent_snapshot(node.selected_datasets(property_name="autobackup:test", exclude_paths=[], exclude_received=False, exclude_unchanged=False, min_change=1), "test-1",
                                                  0,
                                                  pre_snapshot_cmds=["echo pre1", "false", "echo pre2"],
                                                  post_snapshot_cmds=["echo post1", "false", "echo post2"]
@@ -112,7 +112,7 @@ test_target1
                 with redirect_stdout(buf):
                     with self.assertRaises(ExecuteError):
                         #same snapshot name as before so it fails
-                        node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-1",
+                        node.consistent_snapshot(node.selected_datasets(property_name="autobackup:test", exclude_paths=[], exclude_received=False, exclude_unchanged=False, min_change=1), "test-1",
                                                  0,
                                                  pre_snapshot_cmds=["echo pre1", "echo pre2"],
                                                  post_snapshot_cmds=["echo post1", "echo post2"]
@@ -126,10 +126,19 @@ test_target1
 
 
     def test_getselected(self):
+
+        # should be excluded by property
+        shelltest("zfs create test_source1/fs1/subexcluded")
+        shelltest("zfs set autobackup:test=false test_source1/fs1/subexcluded")
+
+        # should be excluded by being unchanged
+        shelltest("zfs create test_source1/fs1/unchanged")
+        shelltest("zfs snapshot test_source1/fs1/unchanged@somesnapshot")
+
         logger = LogStub()
         description = "[Source]"
-        node = ZfsNode("test", logger, description=description)
+        node = ZfsNode(snapshot_time_format="test-%Y%m%d%H%M%S", hold_name="zfs_autobackup:test", logger=logger, description=description)
-        s = pformat(node.selected_datasets(exclude_paths=[], exclude_received=False))
+        s = pformat(node.selected_datasets(property_name="autobackup:test", exclude_paths=[], exclude_received=False, exclude_unchanged=True, min_change=1))
         print(s)
 
         # basics
@@ -137,16 +146,11 @@ test_target1
  (local): test_source1/fs1/sub,
  (local): test_source2/fs2/sub]""")
 
-        # caching, so expect same result after changing it
-        subprocess.check_call("zfs set autobackup:test=true test_source2/fs3", shell=True)
-        self.assertEqual(s, """[(local): test_source1/fs1,
- (local): test_source1/fs1/sub,
- (local): test_source2/fs2/sub]""")
 
     def test_validcommand(self):
         logger = LogStub()
         description = "[Source]"
-        node = ZfsNode("test", logger, description=description)
+        node = ZfsNode(snapshot_time_format="test-%Y%m%d%H%M%S", hold_name="zfs_autobackup:test", logger=logger, description=description)
 
         with self.subTest("test invalid option"):
             self.assertFalse(node.valid_command(["zfs", "send", "--invalid-option", "nonexisting"]))
@@ -156,7 +160,7 @@ test_target1
     def test_supportedsendoptions(self):
         logger = LogStub()
         description = "[Source]"
-        node = ZfsNode("test", logger, description=description)
+        node = ZfsNode(snapshot_time_format="test-%Y%m%d%H%M%S", hold_name="zfs_autobackup:test", logger=logger, description=description)
         # -D propably always supported
         self.assertGreater(len(node.supported_send_options), 0)
 
@@ -164,7 +168,7 @@ test_target1
         logger = LogStub()
         description = "[Source]"
         # NOTE: this could hang via ssh if we dont close filehandles properly. (which was a previous bug)
-        node = ZfsNode("test", logger, description=description, ssh_to='localhost')
+        node = ZfsNode(snapshot_time_format="test-%Y%m%d%H%M%S", hold_name="zfs_autobackup:test", logger=logger, description=description, ssh_to='localhost')
         self.assertIsInstance(node.supported_recv_options, list)
 
 

zfs_autobackup/ExecuteNode.py

@@ -1,8 +1,8 @@
 import os
 import select
 import subprocess
-from zfs_autobackup.CmdPipe import CmdPipe, CmdItem
+from .CmdPipe import CmdPipe, CmdItem
-from zfs_autobackup.LogStub import LogStub
+from .LogStub import LogStub
 
 try:
     from shlex import quote as cmd_quote

zfs_autobackup/Thinner.py

@@ -1,6 +1,6 @@
 import time
 
-from zfs_autobackup.ThinnerRule import ThinnerRule
+from .ThinnerRule import ThinnerRule
 
 
 class Thinner:

zfs_autobackup/ZfsAutobackup.py

@@ -2,21 +2,19 @@ import argparse
 import sys
 import time
 
-from zfs_autobackup import compressors
+from . import compressors
-from zfs_autobackup.ExecuteNode import ExecuteNode
+from .ExecuteNode import ExecuteNode
-from zfs_autobackup.Thinner import Thinner
+from .Thinner import Thinner
-from zfs_autobackup.ZfsDataset import ZfsDataset
+from .ZfsDataset import ZfsDataset
-from zfs_autobackup.LogConsole import LogConsole
+from .LogConsole import LogConsole
-from zfs_autobackup.ZfsNode import ZfsNode
+from .ZfsNode import ZfsNode
-from zfs_autobackup.ThinnerRule import ThinnerRule
+from .ThinnerRule import ThinnerRule
-
-
 
 
 class ZfsAutobackup:
     """main class"""
 
-    VERSION = "3.1"
+    VERSION = "3.1.1-beta1"
     HEADER = "zfs-autobackup v{} - (c)2021 E.H.Eefting (edwin@datux.nl)".format(VERSION)
 
     def __init__(self, argv, print_arguments=True):
@@ -38,10 +36,10 @@ class ZfsAutobackup:
         parser.add_argument('--keep-target', metavar='SCHEDULE', type=str, default="10,1d1w,1w1m,1m1y",
                             help='Thinning schedule for old target snapshots. Default: %(default)s')
 
-        parser.add_argument('backup_name', metavar='backup-name',
+        parser.add_argument('backup_name', metavar='BACKUP-NAME', default=None, nargs='?',
                             help='Name of the backup (you should set the zfs property "autobackup:backup-name" to '
                                  'true on filesystems you want to backup')
-        parser.add_argument('target_path', metavar='target-path', default=None, nargs='?',
+        parser.add_argument('target_path', metavar='TARGET-PATH', default=None, nargs='?',
                             help='Target ZFS filesystem (optional: if not specified, zfs-autobackup will only operate '
                                  'as snapshot-tool on source)')
 
@@ -63,15 +61,16 @@ class ZfsAutobackup:
                                  'default)s)')
         parser.add_argument('--allow-empty', action='store_true',
                             help='If nothing has changed, still create empty snapshots. (same as --min-change=0)')
-        parser.add_argument('--ignore-replicated', action='store_true',
-                            help='Ignore datasets that seem to be replicated some other way. (No changes since '
-                                 'lastest snapshot. Useful for proxmox HA replication)')
 
+        parser.add_argument('--ignore-replicated', action='store_true', help=argparse.SUPPRESS)
+        parser.add_argument('--exclude-unchanged', action='store_true',
+                            help='Exclude datasets that have no changes since any last snapshot. (Useful in combination with proxmox HA replication)')
+        parser.add_argument('--exclude-received', action='store_true',
+                            help='Exclude datasets that have the origin of their autobackup: property as "received". '
+                                 'This can avoid recursive replication between two backup partners.')
         parser.add_argument('--strip-path', metavar='N', default=0, type=int,
                             help='Number of directories to strip from target path (use 1 when cloning zones between 2 '
                                  'SmartOS machines)')
-        # parser.add_argument('--buffer', default="",  help='Use mbuffer with specified size to speedup zfs transfer.
-        # (e.g. --buffer 1G) Will also show nice progress output.')
 
         parser.add_argument('--clear-refreservation', action='store_true',
                             help='Filter "refreservation" property. (recommended, safes space. same as '
@@ -106,11 +105,11 @@ class ZfsAutobackup:
         parser.add_argument('--zfs-compressed', action='store_true',
                             help='Transfer blocks that already have zfs-compression as-is.')
 
-        parser.add_argument('--test', action='store_true',
+        parser.add_argument('--test','--dry-run', '-n', action='store_true',
-                            help='dont change anything, just show what would be done (still does all read-only '
+                            help='Dry run, dont change anything, just show what would be done (still does all read-only '
                                  'operations)')
-        parser.add_argument('--verbose', action='store_true', help='verbose output')
+        parser.add_argument('--verbose','-v', action='store_true', help='verbose output')
-        parser.add_argument('--debug', action='store_true',
+        parser.add_argument('--debug','-d', action='store_true',
                             help='Show zfs commands that are executed, stops after an exception.')
         parser.add_argument('--debug-output', action='store_true',
                             help='Show zfs commands and their output/exit codes. (noisy)')
@@ -121,25 +120,40 @@ class ZfsAutobackup:
 
         parser.add_argument('--resume', action='store_true', help=argparse.SUPPRESS)
         parser.add_argument('--raw', action='store_true', help=argparse.SUPPRESS)
-        parser.add_argument('--exclude-received', action='store_true',
-                            help=argparse.SUPPRESS)  # probably never needed anymore
 
-        #these things all do stuff by piping zfs send/recv IO
+        # these things all do stuff by piping zfs send/recv IO
         parser.add_argument('--send-pipe', metavar="COMMAND", default=[], action='append',
                             help='pipe zfs send output through COMMAND (can be used multiple times)')
         parser.add_argument('--recv-pipe', metavar="COMMAND", default=[], action='append',
                             help='pipe zfs recv input through COMMAND (can be used multiple times)')
-        parser.add_argument('--compress', metavar='TYPE', default=None, choices=compressors.choices(), help='Use compression during transfer, zstd-fast recommended. ({})'.format(", ".join(compressors.choices())))
+        parser.add_argument('--compress', metavar='TYPE', default=None, nargs='?', const='zstd-fast',
-        parser.add_argument('--rate', metavar='DATARATE', default=None, help='Limit data transfer rate (e.g. 128K. requires mbuffer.)')
+                            choices=compressors.choices(),
-        parser.add_argument('--buffer', metavar='SIZE', default=None, help='Add zfs send and recv buffers to smooth out IO bursts. (e.g. 128M. requires mbuffer)')
+                            help='Use compression during transfer, defaults to zstd-fast if TYPE is not specified. ({})'.format(
+                                ", ".join(compressors.choices())))
+        parser.add_argument('--rate', metavar='DATARATE', default=None,
+                            help='Limit data transfer rate (e.g. 128K. requires mbuffer.)')
+        parser.add_argument('--buffer', metavar='SIZE', default=None,
+                            help='Add zfs send and recv buffers to smooth out IO bursts. (e.g. 128M. requires mbuffer)')
 
+        parser.add_argument('--snapshot-format', metavar='FORMAT', default="{}-%Y%m%d%H%M%S",
+                            help='Snapshot naming format. Default: %(default)s')
+        parser.add_argument('--property-format', metavar='FORMAT', default="autobackup:{}",
+                            help='Select property naming format. Default: %(default)s')
+        parser.add_argument('--hold-format', metavar='FORMAT', default="zfs_autobackup:{}",
+                            help='Hold naming format. Default: %(default)s')
 
+        parser.add_argument('--version', action='store_true',
+                            help='Show version.')
 
         # note args is the only global variable we use, since its a global readonly setting anyway
         args = parser.parse_args(argv)
 
         self.args = args
 
+        if args.version:
+            print(self.HEADER)
+            sys.exit(255)
+
         # auto enable progress?
         if sys.stderr.isatty() and not args.no_progress:
             args.progress = True
@@ -159,6 +173,11 @@ class ZfsAutobackup:
         self.log = LogConsole(show_debug=self.args.debug, show_verbose=self.args.verbose, color=sys.stdout.isatty())
         self.verbose(self.HEADER)
 
+        if args.backup_name==None:
+            parser.print_usage()
+            self.log.error("Please specify BACKUP-NAME")
+            sys.exit(255)
+
         if args.resume:
             self.warning("The --resume option isn't needed anymore (its autodetected now)")
 
@@ -176,6 +195,10 @@ class ZfsAutobackup:
         if args.compress and args.zfs_compressed:
             self.warning("Using --compress with --zfs-compressed, might be inefficient.")
 
+        if args.ignore_replicated:
+            self.warning("--ignore-replicated has been renamed, using --exclude-unchanged")
+            args.exclude_unchanged = True
+
     def verbose(self, txt):
         self.log.verbose(txt)
 
@@ -288,12 +311,12 @@ class ZfsAutobackup:
     def get_send_pipes(self, logger):
         """determine the zfs send pipe"""
 
-        ret=[]
+        ret = []
 
         # IO buffer
         if self.args.buffer:
             logger("zfs send buffer        : {}".format(self.args.buffer))
-            ret.extend([ ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m"+self.args.buffer ])
+            ret.extend([ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m" + self.args.buffer])
 
         # custom pipes
         for send_pipe in self.args.send_pipe:
@@ -302,27 +325,26 @@ class ZfsAutobackup:
             logger("zfs send custom pipe   : {}".format(send_pipe))
 
         # compression
-        if self.args.compress!=None:
+        if self.args.compress != None:
             ret.append(ExecuteNode.PIPE)
-            cmd=compressors.compress_cmd(self.args.compress)
+            cmd = compressors.compress_cmd(self.args.compress)
             ret.extend(cmd)
             logger("zfs send compression   : {}".format(" ".join(cmd)))
 
         # transfer rate
         if self.args.rate:
             logger("zfs send transfer rate : {}".format(self.args.rate))
-            ret.extend([ ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m16M", "-R"+self.args.rate ])
+            ret.extend([ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m16M", "-R" + self.args.rate])
-
 
         return ret
 
     def get_recv_pipes(self, logger):
 
-        ret=[]
+        ret = []
 
         # decompression
-        if self.args.compress!=None:
+        if self.args.compress != None:
-            cmd=compressors.decompress_cmd(self.args.compress)
+            cmd = compressors.decompress_cmd(self.args.compress)
             ret.extend(cmd)
             ret.append(ExecuteNode.PIPE)
             logger("zfs recv decompression : {}".format(" ".join(cmd)))
@@ -335,10 +357,10 @@ class ZfsAutobackup:
 
         # IO buffer
         if self.args.buffer:
-            #only add second buffer if its usefull. (e.g. non local transfer or other pipes active)
+            # only add second buffer if its usefull. (e.g. non local transfer or other pipes active)
-            if self.args.ssh_source!=None or self.args.ssh_target!=None or self.args.recv_pipe or self.args.send_pipe or self.args.compress!=None:
+            if self.args.ssh_source != None or self.args.ssh_target != None or self.args.recv_pipe or self.args.send_pipe or self.args.compress != None:
                 logger("zfs recv buffer        : {}".format(self.args.buffer))
-                ret.extend(["mbuffer", "-q", "-s128k", "-m"+self.args.buffer,  ExecuteNode.PIPE ])
+                ret.extend(["mbuffer", "-q", "-s128k", "-m" + self.args.buffer, ExecuteNode.PIPE])
 
         return ret
 
@@ -350,8 +372,8 @@ class ZfsAutobackup:
         :type source_node: ZfsNode
         """
 
-        send_pipes=self.get_send_pipes(source_node.verbose)
+        send_pipes = self.get_send_pipes(source_node.verbose)
-        recv_pipes=self.get_recv_pipes(target_node.verbose)
+        recv_pipes = self.get_recv_pipes(target_node.verbose)
 
         fail_count = 0
         count = 0
@@ -391,7 +413,8 @@ class ZfsAutobackup:
                                               no_send=self.args.no_send,
                                               destroy_incompatible=self.args.destroy_incompatible,
                                               send_pipes=send_pipes, recv_pipes=recv_pipes,
-                                              decrypt=self.args.decrypt, encrypt=self.args.encrypt, zfs_compressed=self.args.zfs_compressed )
+                                              decrypt=self.args.decrypt, encrypt=self.args.encrypt,
+                                              zfs_compressed=self.args.zfs_compressed)
             except Exception as e:
                 fail_count = fail_count + 1
                 source_dataset.error("FAILED: " + str(e))
@@ -417,20 +440,6 @@ class ZfsAutobackup:
         for source_dataset in source_datasets:
             source_dataset.thin(skip_holds=True)
 
-    def filter_replicated(self, datasets):
-        if not self.args.ignore_replicated:
-            return datasets
-        else:
-            self.set_title("Filtering already replicated filesystems")
-            ret = []
-            for dataset in datasets:
-                if dataset.is_changed(self.args.min_change):
-                    ret.append(dataset)
-                else:
-                    dataset.verbose("Ignoring, already replicated")
-
-            return ret
-
     def filter_properties_list(self):
 
         if self.args.filter_properties:
@@ -462,6 +471,19 @@ class ZfsAutobackup:
             if self.args.test:
                 self.warning("TEST MODE - SIMULATING WITHOUT MAKING ANY CHANGES")
 
+            #format all the names
+            property_name = self.args.property_format.format(self.args.backup_name)
+            snapshot_time_format = self.args.snapshot_format.format(self.args.backup_name)
+            hold_name = self.args.hold_format.format(self.args.backup_name)
+
+            self.verbose("")
+            self.verbose("Selecting dataset property : {}".format(property_name))
+            self.verbose("Snapshot format            : {}".format(snapshot_time_format))
+
+            if not self.args.no_holds:
+                self.verbose("Hold name                  : {}".format(hold_name))
+
+
             ################ create source zfsNode
             self.set_title("Source settings")
 
@@ -470,20 +492,20 @@ class ZfsAutobackup:
                 source_thinner = None
             else:
                 source_thinner = Thinner(self.args.keep_source)
-            source_node = ZfsNode(self.args.backup_name, self, ssh_config=self.args.ssh_config,
+            source_node = ZfsNode(snapshot_time_format=snapshot_time_format, hold_name=hold_name, logger=self, ssh_config=self.args.ssh_config,
                                   ssh_to=self.args.ssh_source, readonly=self.args.test,
                                   debug_output=self.args.debug_output, description=description, thinner=source_thinner)
-            source_node.verbose(
+
-                "Selects all datasets that have property 'autobackup:{}=true' (or children of datasets that have "
-                "'autobackup:{}=child')".format(
-                    self.args.backup_name, self.args.backup_name))
 
             ################# select source datasets
             self.set_title("Selecting")
 
-            #Note: Before version v3.1-beta5, we always used exclude_received. This was a problem if you wanto to replicate an existing backup to another host and use the same backupname/snapshots.
+            # Note: Before version v3.1-beta5, we always used exclude_received. This was a problem if you wanted to
+            # replicate an existing backup to another host and use the same backupname/snapshots. However, exclude_received
+            # may still need to be used to explicitly exclude a backup with the 'received' source to avoid accidental
+            # recursive replication of a zvol that is currently being received in another session (as it will have changes).
             exclude_paths = []
-            exclude_received=self.args.exclude_received
+            exclude_received = self.args.exclude_received
             if self.args.ssh_source == self.args.ssh_target:
                 if self.args.target_path:
                     # target and source are the same, make sure to exclude target_path
@@ -491,25 +513,24 @@ class ZfsAutobackup:
                     exclude_paths.append(self.args.target_path)
                 else:
                     self.warning("Source and target are on the same host, excluding received datasets from selection.")
-                    exclude_received=True
+                    exclude_received = True
 
-
+            source_datasets = source_node.selected_datasets(property_name=property_name,exclude_received=exclude_received,
-            selected_source_datasets = source_node.selected_datasets(exclude_received=exclude_received,
+                                                                     exclude_paths=exclude_paths,
-                                                                     exclude_paths=exclude_paths)
+                                                                     exclude_unchanged=self.args.exclude_unchanged,
-            if not selected_source_datasets:
+                                                                     min_change=self.args.min_change)
+            if not source_datasets:
                 self.error(
                     "No source filesystems selected, please do a 'zfs set autobackup:{0}=true' on the source datasets "
                     "you want to select.".format(
                         self.args.backup_name))
                 return 255
 
-            # filter out already replicated stuff?
-            source_datasets = self.filter_replicated(selected_source_datasets)
-
             ################# snapshotting
             if not self.args.no_snapshot:
                 self.set_title("Snapshotting")
-                source_node.consistent_snapshot(source_datasets, source_node.new_snapshotname(),
+                snapshot_name=time.strftime(snapshot_time_format)
+                source_node.consistent_snapshot(source_datasets, snapshot_name,
                                                 min_changed_bytes=self.args.min_change,
                                                 pre_snapshot_cmds=self.args.pre_snapshot_cmd,
                                                 post_snapshot_cmds=self.args.post_snapshot_cmd)
@@ -524,7 +545,7 @@ class ZfsAutobackup:
                     target_thinner = None
                 else:
                     target_thinner = Thinner(self.args.keep_target)
-                target_node = ZfsNode(self.args.backup_name, self, ssh_config=self.args.ssh_config,
+                target_node = ZfsNode(snapshot_time_format=snapshot_time_format, hold_name=hold_name, logger=self, ssh_config=self.args.ssh_config,
                                       ssh_to=self.args.ssh_target,
                                       readonly=self.args.test, debug_output=self.args.debug_output,
                                       description="[Target]",

zfs_autobackup/ZfsDataset.py

@@ -1,8 +1,8 @@
 import re
 import time
 
-from zfs_autobackup.CachedProperty import CachedProperty
+from .CachedProperty import CachedProperty
-from zfs_autobackup.ExecuteNode import ExecuteError
+from .ExecuteNode import ExecuteError
 
 
 class ZfsDataset:
@@ -112,7 +112,7 @@ class ZfsDataset:
         """true if this dataset is a snapshot"""
         return self.name.find("@") != -1
 
-    def is_selected(self, value, source, inherited, exclude_received, exclude_paths):
+    def is_selected(self, value, source, inherited, exclude_received, exclude_paths, exclude_unchanged, min_change):
         """determine if dataset should be selected for backup (called from
         ZfsNode)
 
@@ -122,6 +122,12 @@ class ZfsDataset:
             :type source: str
             :type inherited: bool
             :type exclude_received: bool
+            :type exclude_unchanged: bool
+            :type min_change: bool
+
+            :param value: Value of the zfs property ("false"/"true"/"child"/"-")
+            :param source: Source of the zfs property ("local"/"received", "-")
+            :param inherited: True of the value/source was inherited from a higher dataset.
         """
 
         # sanity checks
@@ -135,28 +141,40 @@ class ZfsDataset:
             raise (Exception(
                 "{} autobackup-property has illegal value: '{}'".format(self.name, value)))
 
+        # non specified, ignore
+        if value == "-":
+            return False
+
+        # only select childs of this dataset, ignore
+        if value == "child" and not inherited:
+            return False
+
+        # manually excluded by property
+        if value == "false":
+            self.verbose("Excluded")
+            return False
+
+        # from here on the dataset is selected by property, now do additional exclusion checks
+
         # our path starts with one of the excluded paths?
         for exclude_path in exclude_paths:
             if self.name.startswith(exclude_path):
                 # too noisy for verbose
-                self.debug("Excluded (in exclude list)")
+                self.debug("Excluded (path in exclude list)")
                 return False
 
-        # now determine if its actually selected
+        if source == "received":
-        if value == "false":
+            if exclude_received:
-            self.verbose("Excluded (disabled)")
+                self.verbose("Excluded (dataset already received)")
+                return False
+
+        if exclude_unchanged and not self.is_changed(min_change):
+            self.verbose("Excluded (unchanged since last snapshot)")
             return False
-        elif value == "true" or (value == "child" and inherited):
+
-            if source == "local":
+        self.verbose("Selected")
-                self.verbose("Selected")
+        return True
-                return True
+
-            elif source == "received":
-                if exclude_received:
-                    self.verbose("Excluded (dataset already received)")
-                    return False
-                else:
-                    self.verbose("Selected")
-                    return True
 
     @CachedProperty
     def parent(self):
@@ -296,21 +314,21 @@ class ZfsDataset:
         if min_changed_bytes == 0:
             return True
 
+
         if int(self.properties['written']) < min_changed_bytes:
             return False
         else:
             return True
 
     def is_ours(self):
-        """return true if this snapshot is created by this backup_name"""
+        """return true if this snapshot name has format"""
-        if re.match("^" + self.zfs_node.backup_name + "-[0-9]*$", self.snapshot_name):
+        try:
-            return True
+            test = self.timestamp
-        else:
+        except ValueError as e:
+            self.error(str(e))
             return False
 
-    @property
+        return True
-    def _hold_name(self):
-        return "zfs_autobackup:" + self.zfs_node.backup_name
 
     @property
     def holds(self):
@@ -322,30 +340,26 @@ class ZfsDataset:
 
     def is_hold(self):
         """did we hold this snapshot?"""
-        return self._hold_name in self.holds
+        return self.zfs_node.hold_name in self.holds
 
     def hold(self):
         """hold dataset"""
         self.debug("holding")
-        self.zfs_node.run(["zfs", "hold", self._hold_name, self.name], valid_exitcodes=[0, 1])
+        self.zfs_node.run(["zfs", "hold", self.zfs_node.hold_name, self.name], valid_exitcodes=[0, 1])
 
     def release(self):
         """release dataset"""
         if self.zfs_node.readonly or self.is_hold():
             self.debug("releasing")
-            self.zfs_node.run(["zfs", "release", self._hold_name, self.name], valid_exitcodes=[0, 1])
+            self.zfs_node.run(["zfs", "release", self.zfs_node.hold_name, self.name], valid_exitcodes=[0, 1])
 
     @property
     def timestamp(self):
         """get timestamp from snapshot name. Only works for our own snapshots
         with the correct format.
         """
-        time_str = re.findall("^.*-([0-9]*)$", self.snapshot_name)[0]
-        if len(time_str) != 14:
-            raise (Exception("Snapshot has invalid timestamp in name: {}".format(self.snapshot_name)))
 
-        # new format:
+        time_secs = time.mktime(time.strptime(self.snapshot_name, self.zfs_node.snapshot_time_format))
-        time_secs = time.mktime(time.strptime(time_str, "%Y%m%d%H%M%S"))
         return time_secs
 
     def from_names(self, names):

zfs_autobackup/ZfsNode.py

@@ -6,20 +6,24 @@ import subprocess
 import sys
 import time
 
-from zfs_autobackup.ExecuteNode import ExecuteNode
+from .ExecuteNode import ExecuteNode
-from zfs_autobackup.Thinner import Thinner
+from .Thinner import Thinner
-from zfs_autobackup.CachedProperty import CachedProperty
+from .CachedProperty import CachedProperty
-from zfs_autobackup.ZfsPool import ZfsPool
+from .ZfsPool import ZfsPool
-from zfs_autobackup.ZfsDataset import ZfsDataset
+from .ZfsDataset import ZfsDataset
-from zfs_autobackup.ExecuteNode import ExecuteError
+from .ExecuteNode import ExecuteError
 
 
 class ZfsNode(ExecuteNode):
     """a node that contains zfs datasets. implements global (systemwide/pool wide) zfs commands"""
 
-    def __init__(self, backup_name, logger, ssh_config=None, ssh_to=None, readonly=False, description="",
+    def __init__(self, snapshot_time_format, hold_name, logger, ssh_config=None, ssh_to=None, readonly=False,
+                 description="",
                  debug_output=False, thinner=None):
-        self.backup_name = backup_name
+
+        self.snapshot_time_format = snapshot_time_format
+        self.hold_name = hold_name
+
         self.description = description
 
         self.logger = logger
@@ -54,7 +58,7 @@ class ZfsNode(ExecuteNode):
         if self.__thinner is not None:
             return self.__thinner.thin(objects, keep_objects)
         else:
-            return ( keep_objects, [] )
+            return (keep_objects, [])
 
     @CachedProperty
     def supported_send_options(self):
@@ -129,8 +133,9 @@ class ZfsNode(ExecuteNode):
                         bytes_left = self._progress_total_bytes - bytes_
                         minutes_left = int((bytes_left / (bytes_ / (time.time() - self._progress_start_time))) / 60)
 
-                        self.logger.progress("Transfer {}% {}MB/s (total {}MB, {} minutes left)".format(percentage, speed, int(
+                        self.logger.progress(
-                            self._progress_total_bytes / (1024 * 1024)), minutes_left))
+                            "Transfer {}% {}MB/s (total {}MB, {} minutes left)".format(percentage, speed, int(
+                                self._progress_total_bytes / (1024 * 1024)), minutes_left))
 
             return
 
@@ -158,11 +163,8 @@ class ZfsNode(ExecuteNode):
     def debug(self, txt):
         self.logger.debug("{} {}".format(self.description, txt))
 
-    def new_snapshotname(self):
+    def consistent_snapshot(self, datasets, snapshot_name, min_changed_bytes, pre_snapshot_cmds=[],
-        """determine uniq new snapshotname"""
+                            post_snapshot_cmds=[]):
-        return self.backup_name + "-" + time.strftime("%Y%m%d%H%M%S")
-
-    def consistent_snapshot(self, datasets, snapshot_name, min_changed_bytes, pre_snapshot_cmds=[], post_snapshot_cmds=[]):
         """create a consistent (atomic) snapshot of specified datasets, per pool.
         """
 
@@ -214,9 +216,7 @@ class ZfsNode(ExecuteNode):
                 except Exception as e:
                     pass
 
-
+    def selected_datasets(self, property_name, exclude_received, exclude_paths, exclude_unchanged, min_change):
-
-    def selected_datasets(self, exclude_received, exclude_paths):
         """determine filesystems that should be backed up by looking at the special autobackup-property, systemwide
 
            returns: list of ZfsDataset
@@ -227,7 +227,7 @@ class ZfsNode(ExecuteNode):
         # get all source filesystems that have the backup property
         lines = self.run(tab_split=True, readonly=True, cmd=[
             "zfs", "get", "-t", "volume,filesystem", "-o", "name,value,source", "-H",
-            "autobackup:" + self.backup_name
+            property_name
         ])
 
         # The returnlist of selected ZfsDataset's:
@@ -251,7 +251,9 @@ class ZfsNode(ExecuteNode):
                 source = raw_source
 
             # determine it
-            if dataset.is_selected(value=value, source=source, inherited=inherited, exclude_received=exclude_received, exclude_paths=exclude_paths):
+            if dataset.is_selected(value=value, source=source, inherited=inherited, exclude_received=exclude_received,
+                                   exclude_paths=exclude_paths, exclude_unchanged=exclude_unchanged,
+                                   min_change=min_change):
                 selected_filesystems.append(dataset)
 
         return selected_filesystems

zfs_autobackup/ZfsPool.py

@@ -1,4 +1,4 @@
-from zfs_autobackup.CachedProperty import CachedProperty
+from .CachedProperty import CachedProperty
 
 
 class ZfsPool():

zfs_autobackup/__init__.py

@@ -3,7 +3,7 @@
 
 def cli():
     import sys
-    from zfs_autobackup.ZfsAutobackup import ZfsAutobackup
+    from .ZfsAutobackup import ZfsAutobackup
 
     zfs_autobackup = ZfsAutobackup(sys.argv[1:], False)
     sys.exit(zfs_autobackup.run())

zfs_autobackup/compressors.py

@@ -35,6 +35,12 @@ COMPRESS_CMDS = {
         'dcmd': 'zstdmt',
         'dargs': [ '-dc' ],
     },
+    'zstd-adapt': {
+        'cmd': 'zstdmt',
+        'args': [ '--adapt' ],
+        'dcmd': 'zstdmt',
+        'dargs': [ '-dc' ],
+    },
     'xz': {
         'cmd': 'xz',
         'args': [],