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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4143) HTable.doPut(List) should check the writebuffer lengh every so often
Date Wed, 27 Jul 2011 22:01:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072048#comment-13072048
] 

Andrew Purtell commented on HBASE-4143:
---------------------------------------

+1 on second patch.

I made just a documentation change because I wasn't convinced that really large RPCs didn't
have a place, but if the consensus is to change put(List<Put>) that makes sense to me.


> HTable.doPut(List) should check the writebuffer lengh every so often
> --------------------------------------------------------------------
>
>                 Key: HBASE-4143
>                 URL: https://issues.apache.org/jira/browse/HBASE-4143
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Doug Meil
>            Assignee: Doug Meil
>            Priority: Minor
>         Attachments: client_HBASE_4143.patch
>
>
> This came up on a dist-list conversation between Andy P., Ted Yu, and myself.  Andy noted
that extremely large lists passed into put(List) can cause issues.  Ted suggested that having
doPut check the write-buffer length every so often (5-10 records?) so the flush doesn't happen
only at the end, and I think that's good idea.
>  public void put(final List<Put> puts) throws IOException {
>     doPut(puts);
>   }
>   private void doPut(final List<Put> puts) throws IOException {
>     for (Put put : puts) {
>       validatePut(put);
>       writeBuffer.add(put);
>       currentWriteBufferSize += put.heapSize();
>     }
>     if (autoFlush || currentWriteBufferSize > writeBufferSize) {
>       flushCommits();
>     }
>   }
> Once this change is made, remove the comment in HBASE-4142 about large lists being a
performance problem.

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