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https://issues.apache.org/jira/browse/HBASE-10324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13870416#comment-13870416
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Ted Yu commented on HBASE-10324:
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After verifying that isDeferredLogFlush() and setDeferredLogFlush() are
deprecated in 0.96, I integrated patch v3 to 0.98.
Thanks for the patch, Honghua.
> refactor deferred-log-flush/Durability related interface/code/naming to align
> with changed semantic of the new write thread model
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-10324
> URL: https://issues.apache.org/jira/browse/HBASE-10324
> Project: HBase
> Issue Type: Improvement
> Components: Client, regionserver
> Reporter: Feng Honghua
> Assignee: Feng Honghua
> Fix For: 0.98.0, 0.99.0
>
> Attachments: 10324-trunk_v3.patch, HBASE-10324-trunk_v0.patch,
> HBASE-10324-trunk_v1.patch, HBASE-10324-trunk_v2.patch
>
>
> By the new write thread model introduced by
> [HBASE-8755|https://issues.apache.org/jira/browse/HBASE-8755], some
> deferred-log-flush/Durability API/code/names should be change accordingly:
> 1. no timer-triggered deferred-log-flush since flush is always done by async
> threads, so configuration 'hbase.regionserver.optionallogflushinterval' is no
> longer needed
> 2. the async writer-syncer-notifier threads will always be triggered
> implicitly, this semantic is that it always holds that
> 'hbase.regionserver.optionallogflushinterval' > 0, so deferredLogSyncDisabled
> in HRegion.java which affects durability behavior should always be false
> 3. what HTableDescriptor.isDeferredLogFlush really means is the write can
> return without waiting for the sync is done, so the interface name should be
> changed to isAsyncLogFlush/setAsyncLogFlush to reflect their real meaning
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