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https://issues.apache.org/jira/browse/IGNITE-17613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17607736#comment-17607736
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Maksim Timonin edited comment on IGNITE-17613 at 9/21/22 1:08 PM:
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There is a draft PR: [https://github.com/apache/ignite/pull/10261/files]
It contains:
# A commit for IGNITE-17645 (add last wal segment to SnapshotMetadata)
[https://github.com/apache/ignite/pull/10261/commits/582305821c197cda17e0bbb7a386f2c457fd93a5]
# Flag for create incremental snapshot
# Сheck that there is no gaps in WAL segments
(IgniteSnapshotManager#validateIncrementalSnapshotSegments,
IgniteSnapshotManager#validateCurrentSegments)
# Checks cache data (IgniteSnapshotManger#checkCacheData), binary meta
(IgniteSnapshotManager#checkBinaryMeta)
# draft of IncrementalSnapshotMetadata
# Entrypoint for creating incremental snapshot:
IgniteSnapshotManager#createIncrementalSnapshot
was (Author: timonin.maksim):
There is a draft PR: [https://github.com/apache/ignite/pull/10261/files]
It contains:
# A commit for IGNITE-17645 (add last wal segment to SnapshotMetadata)
[https://github.com/apache/ignite/pull/10261/commits/582305821c197cda17e0bbb7a386f2c457fd93a5]
# Flag for create incremental snapshot
# Some checks for snapshot: checking that there is no gaps in WAL segments
(IgniteSnapshotManager#validateIncrementalSnapshotSegments,
IgniteSnapshotManager#validateCurrentSegments)
# draft of IncrementalSnapshotMetadata
# Entrypoint for creating incremental snapshot:
IgniteSnapshotManager#createIncrementalSnapshot
> Create incremental snapshot
> ---------------------------
>
> Key: IGNITE-17613
> URL: https://issues.apache.org/jira/browse/IGNITE-17613
> Project: Ignite
> Issue Type: Sub-task
> Reporter: Maksim Timonin
> Assignee: Maksim Timonin
> Priority: Major
> Labels: IEP-89, ise
>
> Incremental snapshot is a lightweight alternative to full snapshot. It bases
> on the non-blocking Consistent Cut algorithm and provides a collection of WAL
> segments that hold logical changes since previous snapshot (full or
> incremental).
> Incremental snapshot should contain:
> * compacted WAL segments
> * meta file with Consistent Cut to restore on
> * binary_meta if it has changed since previous snapshot.
> Incremental snapshot is stored within full snapshot directory.
> Incremental snapshot before creation checks:
> * Base snapshot (at least its metafile) exists. Exists metafile for all
> incremental snapshots.
> * Validate that no misses in WAL segments since previous snapshot.
> * Check that new _ConsistentCutVersion_ is greater than version of previous
> snapshots.
> * Check that baseline topology and cacheGroups are the same (relatively to
> base snapshot).
> More info in IEP:
> [https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=211884314]
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