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Posted to hdfs-issues@hadoop.apache.org by "Ivan Kelly (JIRA)" <ji...@apache.org> on 2013/07/19 18:46:51 UTC

[jira] [Commented] (HDFS-4265) BKJM doesn't take advantage of speculative reads

    [ https://issues.apache.org/jira/browse/HDFS-4265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713827#comment-13713827 ] 

Ivan Kelly commented on HDFS-4265:
----------------------------------

+1 for the patch.
                
> BKJM doesn't take advantage of speculative reads
> ------------------------------------------------
>
>                 Key: HDFS-4265
>                 URL: https://issues.apache.org/jira/browse/HDFS-4265
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>            Reporter: Ivan Kelly
>            Assignee: Rakesh R
>         Attachments: 001-HDFS-4265.patch
>
>
> BookKeeperEditLogInputStream reads entry at a time, so it doesn't take advantage of the speculative read mechanism introduced by BOOKKEEPER-336.

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