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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-61) [hbase] Create an HBase-specific MapFile implementation
Date Fri, 11 Apr 2008 21:06:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-61?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12588116#action_12588116
] 

Jim Kellerman commented on HBASE-61:
------------------------------------

I ran some performance tests today and the results were not pretty.

Doing 1,048,576 sequential writes through HBase onto the local file system achieved 3,620
writes per second.

Writing 1,048,576 records sequentially into a MapFile onto the local file system was slightly
better at 5,674 writes per second.


> [hbase] Create an HBase-specific MapFile implementation
> -------------------------------------------------------
>
>                 Key: HBASE-61
>                 URL: https://issues.apache.org/jira/browse/HBASE-61
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: io
>            Reporter: Bryan Duxbury
>            Priority: Minor
>
> Today, HBase uses the Hadoop MapFile class to store data persistently to disk. This is
convenient, as it's already done (and maintained by other people :). However, it's beginning
to look like there might be possible performance benefits to be had from doing an HBase-specific
implementation of MapFile that incorporated some precise features.
> This issue should serve as a place to track discussion about what features might be included
in such an implementation.

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