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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-5556) add some more NameNode cache statistics, cache pool stats
Date Fri, 22 Nov 2013 21:42:35 GMT

     [ https://issues.apache.org/jira/browse/HDFS-5556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HDFS-5556:
---------------------------------------

    Attachment: HDFS-5556.001.patch

* listCachePools now returns a list of CachePoolEntry objects, which contain CachePoolInfo
and CachePoolStats.  This is similar to how we handle listDirectives.

* CachePool now contains an implicit list of all the CacheDirective objects in that pool.
 Currently, this just makes deleting a cache pool faster.  In the future, this will be useful
for improving the cache replication monitor.

* rename some places where we were using the word "entry" but really we should be saying "directive"

* validate that we can't set negative CachePool weights.  Throw InvalidRequestException rather
than plain IOE when asked to do this.

* CacheReplicationMonitor#rescanCacheDirectives: fix invalid javadoc comment.

* add NameNode statistics for total cluster cache capacity and usage in bytes.

* CacheManager#processCacheReportImpl: since we no longer send the genstamp of cached blocks
on the wire in cache reports, there is no need to check it here.

> add some more NameNode cache statistics, cache pool stats
> ---------------------------------------------------------
>
>                 Key: HDFS-5556
>                 URL: https://issues.apache.org/jira/browse/HDFS-5556
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: 3.0.0
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-5556.001.patch
>
>
> Add some more NameNode cache statistics and also cache pool statistics.



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