Add "checkpoint_volume" configuration option to creates checkpoints every specified number of bytes.

NEWS

@@ -9,6 +9,8 @@
  * Add "--repository" flag to the "rcreate" action to optionally select one configured repository to
    create.
  * Add "--progress" flag to the "transfer" action, new in Borg 2.0.0b5.
+ * Add "checkpoint_volume" configuration option to creates checkpoints every specified number of
+   bytes during a long-running backup, new in Borg 2.0.0b5.
 
 1.7.7
  * #642: Add MySQL database hook "add_drop_database" configuration option to control whether dumped

borgmatic/borg/create.py

@@ -337,6 +337,7 @@ def create_archive(
         expand_home_directories(location_config.get('exclude_patterns'))
     )
     checkpoint_interval = storage_config.get('checkpoint_interval', None)
+    checkpoint_volume = storage_config.get('checkpoint_volume', None)
     chunker_params = storage_config.get('chunker_params', None)
     compression = storage_config.get('compression', None)
     upload_rate_limit = storage_config.get('upload_rate_limit', None)
@@ -381,6 +382,7 @@ def create_archive(
         + make_pattern_flags(location_config, pattern_file.name if pattern_file else None)
         + make_exclude_flags(location_config, exclude_file.name if exclude_file else None)
         + (('--checkpoint-interval', str(checkpoint_interval)) if checkpoint_interval else ())
+        + (('--checkpoint-volume', str(checkpoint_volume)) if checkpoint_volume else ())
         + (('--chunker-params', chunker_params) if chunker_params else ())
         + (('--compression', compression) if compression else ())
         + upload_ratelimit_flags

borgmatic/config/schema.yaml

@@ -240,6 +240,16 @@ properties:
                     for details. Defaults to checkpoints every 1800 seconds (30
                     minutes).
                 example: 1800
+            checkpoint_volume:
+                type: integer
+                description: |
+                    Number of backed up bytes between each checkpoint during a
+                    long-running backup. Only supported with Borg 2+. See
+                    https://borgbackup.readthedocs.io/en/stable/faq.html
+                    for details. Defaults to only time-based checkpointing (see
+                    "checkpoint_interval") instead of volume-based
+                    checkpointing.
+                example: 1048576
             chunker_params:
                 type: string
                 description: |

tests/unit/borg/test_create.py

@@ -874,6 +874,47 @@ def test_create_archive_with_checkpoint_interval_calls_borg_with_checkpoint_inte
     )
 
 
+def test_create_archive_with_checkpoint_volume_calls_borg_with_checkpoint_volume_parameters():
+    flexmock(module.borgmatic.logger).should_receive('add_custom_log_levels')
+    flexmock(module.logging).ANSWER = module.borgmatic.logger.ANSWER
+    flexmock(module).should_receive('collect_borgmatic_source_directories').and_return([])
+    flexmock(module).should_receive('deduplicate_directories').and_return(('foo', 'bar'))
+    flexmock(module).should_receive('map_directories_to_devices').and_return({})
+    flexmock(module).should_receive('expand_directories').and_return(())
+    flexmock(module).should_receive('pattern_root_directories').and_return([])
+    flexmock(module.os.path).should_receive('expanduser').and_raise(TypeError)
+    flexmock(module).should_receive('expand_home_directories').and_return(())
+    flexmock(module).should_receive('write_pattern_file').and_return(None)
+    flexmock(module.feature).should_receive('available').and_return(True)
+    flexmock(module).should_receive('ensure_files_readable')
+    flexmock(module).should_receive('make_pattern_flags').and_return(())
+    flexmock(module).should_receive('make_exclude_flags').and_return(())
+    flexmock(module.flags).should_receive('make_repository_archive_flags').and_return(
+        (f'repo::{DEFAULT_ARCHIVE_NAME}',)
+    )
+    flexmock(module.environment).should_receive('make_environment')
+    flexmock(module).should_receive('execute_command').with_args(
+        ('borg', 'create', '--checkpoint-volume', '1024') + REPO_ARCHIVE_WITH_PATHS,
+        output_log_level=logging.INFO,
+        output_file=None,
+        borg_local_path='borg',
+        working_directory=None,
+        extra_environment=None,
+    )
+
+    module.create_archive(
+        dry_run=False,
+        repository='repo',
+        location_config={
+            'source_directories': ['foo', 'bar'],
+            'repositories': ['repo'],
+            'exclude_patterns': None,
+        },
+        storage_config={'checkpoint_volume': 1024},
+        local_borg_version='1.2.3',
+    )
+
+
 def test_create_archive_with_chunker_params_calls_borg_with_chunker_params_parameters():
     flexmock(module.borgmatic.logger).should_receive('add_custom_log_levels')
     flexmock(module.logging).ANSWER = module.borgmatic.logger.ANSWER