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From "Ivan Rakov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-7754) WAL in LOG_ONLY mode doesn't execute fsync on checkpoint begin
Date Mon, 19 Mar 2018 12:15:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-7754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16404698#comment-16404698
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Ivan Rakov commented on IGNITE-7754:
------------------------------------

Pull request (3656) contains dirty fix to measure performance impact. Please, don't merge.

> 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
>
>
> 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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