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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2613) Take advantage of HDFS caching to improve MTTR
Date Wed, 02 Apr 2014 16:43:24 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13957868#comment-13957868
] 

Eric Newton commented on ACCUMULO-2613:
---------------------------------------

It is not unusual to have a metadata tablet on half the nodes of a cluster.

> Take advantage of HDFS caching to improve MTTR
> ----------------------------------------------
>
>                 Key: ACCUMULO-2613
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2613
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Sean Busbey
>            Priority: Critical
>             Fix For: 1.7.0
>
>
> Hadoop 2.3.0 added [HDFS caching|http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/CentralizedCacheManagement.html].
> We should use this for small internal use tables (like !METADATA) and we should probably
have a configurable option to use it for tables, with a stern warning that it should only
be enabled on small tables that will be frequently used.



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