[jira] [Commented] (HBASE-10487) Avoid allocating new KeyValue and according bytes-copying for appended kvs which don't have existing values

["Ted Yu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-10487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13897511#comment-13897511 ] 

Ted Yu commented on HBASE-10487:
--------------------------------

Integrated to trunk.

Patch doesn't apply cleanly on 0.98

Thanks for the patch, Honghua.

> Avoid allocating new KeyValue and according bytes-copying for appended kvs which don't have existing values
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-10487
>                 URL: https://issues.apache.org/jira/browse/HBASE-10487
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Feng Honghua
>            Assignee: Feng Honghua
>         Attachments: HBASE-10487-trunk_v1.patch
>
>
> in HRegion.append, new KeyValues will be allocated and do according bytes-copying no matter whether there are existing kv for the appended cells, we can improve here by avoiding the allocating of new KeyValue and according bytes-copying for kv which don't have existing(old) values by reusing the passed-in kv and only updating its timestamp to 'now'(its original timestamp is latest, so can be updated)



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