[
https://issues.apache.org/jira/browse/HBASE-20298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16423718#comment-16423718
]
Yu Li commented on HBASE-20298:
-------------------------------
+1 on the doc changes, thanks for taking care of this sir. [~stack]
>From checkstyle output, we need to remove unused imports (caused by change in
>this patch) from {{HRegionServer}}
> Doc change in read/write/total accounting metrics
> -------------------------------------------------
>
> Key: HBASE-20298
> URL: https://issues.apache.org/jira/browse/HBASE-20298
> Project: HBase
> Issue Type: Sub-task
> Components: documentation
> Reporter: stack
> Assignee: stack
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: HBASE-20298.master.001.patch,
> HBASE-20298.master.002.patch
>
>
> Doc the change wrought by the parent issue. Get it up into the refguide as
> part of the difference between old hbases and hbase2.
> The change confused me and took me a while to untangle.
> The read count is for reads that return a non-empty result now. In old
> hbase1, we'd increment the read-count even if an empty result. This makes
> reads look bad in YCSB runs when compared to hbase1 (see how
> totalRequestCount in hbase2 can be way above the sum of reads+writes; it is
> because it increments even if the row is not found).
> Let me get this into refguide otherwise poor old operators will be baffled.
> The release note on the parent is great; it just needs to be in our guide.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
