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https://issues.apache.org/jira/browse/HBASE-14082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14639875#comment-14639875
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Lei Chen commented on HBASE-14082:
----------------------------------
If an existing parser uses exact-string matching or order-sensitive key-value
matching, it may not be backwards compatible.
For example, If we have 2 regions, one primary and one secondary
{{namespace_default_table_sales_region_00000000000000000000000000000000_metric_storeCount}}
{{namespace_default_table_sales_region_11111111111111111111111111111111_metric_storeCount}}
becomes
{{namespace_default_table_sales_region_00000000000000000000000000000000_metric_storeCount}}
{{namespace_default_table_sales_region_11111111111111111111111111111111_replicaid_1_metric_storeCount}}
Since I'm not familiar with any existing parser, please correct me if I made
any false assumption.
> 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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