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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3638) Cache the iFile index files in memory to reduce seeks during map output serving
Date Wed, 25 Jun 2008 17:08:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608115#action_12608115
] 

Owen O'Malley commented on HADOOP-3638:
---------------------------------------

I'd suggest setting an upper bound on the size of the cache and treat it as LRU cache.

> Cache the iFile index files in memory to reduce seeks during map output serving
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-3638
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3638
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>             Fix For: 0.19.0
>
>
> The iFile index files can be cached in memory to reduce seeks during map output serving.

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