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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-236) Random read benchmark for DFS
Date Thu, 09 Jun 2011 14:30:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13046572#comment-13046572
] 

Kihwal Lee commented on HDFS-236:
---------------------------------

* Some test.io.randomread.* seem to deserve a spot in command line args. 
* The buffer size can be used as the read size in random reads. I see no reason to separate
the two in the random read mode.
* The default behavior is, one random reader operates on just one file out of N files. Since
it already has ability to limit the number of files that each reader can access, it might
be better to make it work on all N files by default.


> Random read benchmark for DFS
> -----------------------------
>
>                 Key: HDFS-236
>                 URL: https://issues.apache.org/jira/browse/HDFS-236
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>         Attachments: HDFS-236.patch, RndRead-TestDFSIO.patch
>
>
> We should have at least one  random read benchmark that can be run with rest of Hadoop
benchmarks regularly.
> Please provide benchmark  ideas or requirements.

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