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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2467) Concurrent flushers in HLog sync using HDFS-895
Date Tue, 20 Apr 2010 22:49:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12859109#action_12859109
] 

Jean-Daniel Cryans commented on HBASE-2467:
-------------------------------------------

But at a lower level somehow you still have to wait for another thread to finish before writing
your own stuff in the block right? So what you're telling me is that 895 basically takes the
grouping at a lower level? 

> Concurrent flushers in HLog sync using HDFS-895
> -----------------------------------------------
>
>                 Key: HBASE-2467
>                 URL: https://issues.apache.org/jira/browse/HBASE-2467
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hbase-2467.txt
>
>
> HDFS-895 changes hflush() to be able to run concurrently from multiple threads, where
flushes can be concurrent with further writes to the same file.
> We need to rip out/amend the group commit code a bit to take advantage of this.

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