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Posted to issues@hbase.apache.org by "Doug Meil (JIRA)" <ji...@apache.org> on 2011/07/27 22:36:10 UTC
[jira] [Commented] (HBASE-4143) HTable.doPut(List) should check the
writebuffer lengh every so often
[ https://issues.apache.org/jira/browse/HBASE-4143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13071982#comment-13071982 ]
Doug Meil commented on HBASE-4143:
----------------------------------
Changed HTable.doPut for periodic check of in-loop writebuffer length, and javadoc comment in HTableIterface.
I ran TestHTableUtil locally because that uses the put(List) method, and the tests passed.
> 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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