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https://issues.apache.org/jira/browse/HBASE-12719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HBASE-12719 started by Sean Busbey.
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> Add test WAL provider to quantify FSHLog overhead in the absence of HDFS.
> -------------------------------------------------------------------------
>
> Key: HBASE-12719
> URL: https://issues.apache.org/jira/browse/HBASE-12719
> Project: HBase
> Issue Type: Improvement
> Components: test, wal
> Reporter: Sean Busbey
> Assignee: Sean Busbey
> Priority: Minor
> Fix For: 2.0.0, 1.1.0
>
>
> Discussion in HBASE-5699 included showing the max throughput for our WAL
> benchmark (using the DisabledWALProvider) compared to when we are actually
> dealing with synchronization and talking with HDFS.
> What we can't see in that comparison is how much of the (sizable) gap is due
> to the coordination done in FSHLog to deal with multi-threading and how much
> of it is due to talking to HDFS.
> Make a test-only provider that we can use to isolate the cost for HDFS
> appends, HDFS flush, and file rolling.
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