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https://issues.apache.org/jira/browse/HBASE-16302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashu Pachauri updated HBASE-16302:
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Fix Version/s: 1.3.1
1.4.0
2.0.0
Status: Patch Available (was: Open)
> age of last shipped op and age of last applied op should be histograms
> ----------------------------------------------------------------------
>
> Key: HBASE-16302
> URL: https://issues.apache.org/jira/browse/HBASE-16302
> Project: HBase
> Issue Type: Improvement
> Components: Replication
> Reporter: Ashu Pachauri
> Assignee: Ashu Pachauri
> Fix For: 2.0.0, 1.4.0, 1.3.1
>
> Attachments: HBASE-16302.patch.v0.patch
>
>
> Replication exports metric ageOfLastShippedOp as an indication of how much
> replication is lagging. But, with multiwal enabled, it's not representative
> because replication could be lagging for a long time for one wal group
> (something wrong with a particular region) while being fine for others. The
> ageOfLastShippedOp becomes a useless metric for alerting in such a case.
> Also, since there is no mapping between individual replication sources and
> replication sinks, the age of last applied op can be a highly spiky metric if
> only certain replication sources are lagging.
> We should use histograms for these metrics and use maximum value of this
> histogram to report replication lag when building stats.
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