third-party-mirrors/zfs_autobackup
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Edwin Eefting 2024-09-24 15:21:31 +02:00
parent cc1e7c24b1
commit a6680ee205
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1 changed files with 6 additions and 5 deletions
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zfs_autobackup/ZfsDataset.py
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@ -1119,10 +1119,9 @@ class ZfsDataset:
"""
# determine common and start snapshot
### 1: determine common and start snapshot
target_dataset.debug("Determining start snapshot")
source_common_snapshot = self.find_common_snapshot(target_dataset, guid_check=guid_check)
# start_snapshot = self.find_start_snapshot(source_common_snapshot, also_other_snapshots)
incompatible_target_snapshots = target_dataset.find_incompatible_snapshots(source_common_snapshot, raw)
# let thinner decide whats obsolete on source after the transfer is done, keeping the last snapshot as common.
@ -1130,13 +1129,15 @@ class ZfsDataset:
if self.our_snapshots:
source_obsoletes = self.thin_list(keeps=[self.our_snapshots[-1]])[1]
### 2: Determine possible target snapshots
# start with snapshots that already exist, minus imcompatibles
if target_dataset.exists:
possible_target_snapshots = [snapshot for snapshot in target_dataset.snapshots if snapshot not in incompatible_target_snapshots]
else:
possible_target_snapshots = []
#Add all snapshots from the source, starting after the common snapshot if it exists
# add all snapshots from the source, starting after the common snapshot if it exists
if source_common_snapshot:
source_snapshot=self.find_next_snapshot(source_common_snapshot )
else:
@ -1153,14 +1154,14 @@ class ZfsDataset:
possible_target_snapshots.append(target_snapshot)
source_snapshot = self.find_next_snapshot(source_snapshot)
#Now the thinner can decide which snapshots we want on the target, by looking at the whole picture:
### 3: Let the thinner decide what it wants by looking at all the possible target_snaphots at once
if possible_target_snapshots:
(target_keeps, target_obsoletes)=target_dataset.zfs_node.thin_list(possible_target_snapshots, keep_snapshots=[possible_target_snapshots[-1]])
else:
target_keeps = []
target_obsoletes = []
#Create a list of all the target snapshots we want, that don't exist yet
### 4: Look at what the thinner wants and create a list of snapshots we still need to transfer
target_transfers=[]
for target_keep in target_keeps:
if not target_keep.exists: