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https://issues.apache.org/jira/browse/IGNITE-7754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408016#comment-16408016
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Ivan Rakov commented on IGNITE-7754:
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Benchmark results: WAL compaction disabled
!screenshot-1.png|width=66%!
> WAL in LOG_ONLY mode doesn't execute fsync on checkpoint begin
> --------------------------------------------------------------
>
> Key: IGNITE-7754
> URL: https://issues.apache.org/jira/browse/IGNITE-7754
> Project: Ignite
> Issue Type: Bug
> Components: persistence
> Reporter: Ilya Lantukh
> Assignee: Ivan Rakov
> Priority: Critical
> Fix For: 2.5
>
> Attachments: image-2018-03-20-19-08-42-234.png, screenshot-1.png
>
>
> On checkpoint begin method IgniteWriteAheadLogManager.fsync(WALPointer ptr)
> will be called, but it won't actually perform fsync because mode isn't FSYNC.
> It might lead to LFS corruption if OS or hardware failed until checkpoint had
> been finished.
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