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From "Bryan Duxbury (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2597) [hbase] Performance - add a block cache
Date Mon, 14 Jan 2008 15:37:34 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12558634#action_12558634

Bryan Duxbury commented on HADOOP-2597:

I like this idea. We could implement it with a wrapper around MapFile, something like CachingMapFile.

> [hbase] Performance - add a block cache
> ---------------------------------------
>                 Key: HADOOP-2597
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2597
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: contrib/hbase
>            Reporter: Tom White
> A block cache would cache fixed size blocks (default 64k) of data read from HDFS by the
MapFile. It would help read performance for data close to recently read data (see Bigtable
paper, section 6). It would be configurable on a per-column family basis.

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