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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-2838) Replication metrics
Date Tue, 27 Jul 2010 05:34:16 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jean-Daniel Cryans resolved HBASE-2838.

    Hadoop Flags: [Reviewed]
      Resolution: Fixed

Committed to trunk, thanks for reviewing Stack!

> Replication metrics
> -------------------
>                 Key: HBASE-2838
>                 URL: https://issues.apache.org/jira/browse/HBASE-2838
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.90.0
> Replication needs to publish metrics about its performance:
>  - WALEdits read, filtered, sent to slave clusters, applied on slaves
>  - size of batches sent/received
>  - ms spent on reading, sending, applying edits
> This can be done using HadoopMetrics.
> Also we need to publish information not related to performance:
>  - size of each HLog queues
>  - age of the last replicated edit in each queue
>  - time of last successful replication
> These informations can hardly be graphed, but we still need to represent them somehow.
It has to be accessible by web UI, shell, and other tools in general. I don't feel strongly
about creating a new public method on HRS's interface, and I'm not sure publishing those in
ZooKeeper is a good idea either (why add another indirection?). Still wondering about a better

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