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https://issues.apache.org/jira/browse/HBASE-14082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14642890#comment-14642890
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Ted Yu commented on HBASE-14082:
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In the above scenario, secondary replicas get excluded from current parser.
I think this is acceptable - there haven't been many deployments with read
replica enabled.
I only know of one such deployment.
> Add replica id to JMX metrics names
> -----------------------------------
>
> Key: HBASE-14082
> URL: https://issues.apache.org/jira/browse/HBASE-14082
> Project: HBase
> Issue Type: Improvement
> Components: metrics
> Reporter: Lei Chen
> Assignee: Lei Chen
> Attachments: HBASE-14082-v1.patch
>
>
> Today, via JMX, one cannot distinguish a primary region from a replica. A
> possible solution is to add replica id to JMX metrics names. The benefits may
> include, for example:
> # Knowing the latency of a read request on a replica region means the first
> attempt to the primary region has timeout.
> # Write requests on replicas are due to the replication process, while the
> ones on primary are from clients.
> # In case of looking for hot spots of read operations, replicas should be
> excluded since TIMELINE reads are sent to all replicas.
> To implement, we can change the format of metrics names found at
> {code}Hadoop->HBase->RegionServer->Regions->Attributes{code}
> from
> {code}namespace_<namespace>_table_<tablename>_region_<regionname>_metric_<metricname>{code}
> to
> {code}namespace_<namespace>_table_<tablename>_region_<regionname>_replicaid_<replicaid>_metric_<metricname>{code}
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