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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14314) Metrics for block cache should take region replicas into account
Date Fri, 04 Sep 2015 18:39:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14731217#comment-14731217

Enis Soztutar commented on HBASE-14314:

How does this play with the L1/L2 breakdown for the block cache?
This patch adds metrics to only some of the block cache metrics, and not all. For example,
there is no windowing for the primary hit count, hitCachingCount, etc. I was suggesting (offline)
that we should instead create another CacheStats for primary breakdown and L1 / L2 breakdown
and have an aggregating CacheStats that would keep the aggregate and also delegate to the
primary/secondary and L1/L2 breakdown CacheStats.  

> Metrics for block cache should take region replicas into account
> ----------------------------------------------------------------
>                 Key: HBASE-14314
>                 URL: https://issues.apache.org/jira/browse/HBASE-14314
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics, regionserver
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.3.0
>         Attachments: 14314-branch-1.txt, 14314-v1.txt, 14314-v2.txt, 14314-v3.txt, 14314-v4.txt,
> Currently metrics for block cache are aggregates in the sense that they don't distinguish
primary from secondary / tertiary replicas.
> This JIRA separates the block cache metrics for primary region replica from the aggregate.

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