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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2015/10/07 01:08:26 UTC
[jira] [Commented] (HBASE-14117) Check DBEs where fields are being
read from Bytebuffers but unused.
[ https://issues.apache.org/jira/browse/HBASE-14117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14945968#comment-14945968 ]
stack commented on HBASE-14117:
-------------------------------
What else is to be done here? If it is speculative benefit, move it out as subtask of the parent issue?
> Check DBEs where fields are being read from Bytebuffers but unused.
> -------------------------------------------------------------------
>
> Key: HBASE-14117
> URL: https://issues.apache.org/jira/browse/HBASE-14117
> Project: HBase
> Issue Type: Sub-task
> Reporter: ramkrishna.s.vasudevan
> Assignee: Jingcheng Du
>
> {code}
> public Cell getFirstKeyCellInBlock(ByteBuff block) {
> block.mark();
> block.position(Bytes.SIZEOF_INT);
> int keyLength = ByteBuff.readCompressedInt(block);
> // TODO : See if we can avoid these reads as the read values are not getting used
> ByteBuff.readCompressedInt(block);
> {code}
> In DBEs many a places we read the integers just to skip them. This JIRA is to see if we can avoid this and rather go position based, as per a review comment in HBASE-12213.
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