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Posted to issues@hbase.apache.org by "Feng Honghua (JIRA)" <ji...@apache.org> on 2014/02/08 12:45:19 UTC

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

     [ https://issues.apache.org/jira/browse/HBASE-10487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Feng Honghua updated HBASE-10487:
---------------------------------

    Description: in HRegion.append, a new KeyValue will be allocated no matter there is existing kv for the appended cell, 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)  (was: in HRegion.append, a new KeyValue will be allocated no matter there is existing kv for the appended cell, we can improve here by avoiding the allocating of new KeyValue for kv without existing value by reusing the passed-in kv and only update its timestamp to 'now'(its original timestamp is latest, so can be updated))
        Summary: Avoid allocating new KeyValue and bytes-copying for appended kvs which don't have existing(old) values  (was: Avoid allocating new KeyValue for appended kvs which don't have existing(old) values)

> Avoid allocating new KeyValue and bytes-copying for appended kvs which don't have existing(old) 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, a new KeyValue will be allocated no matter there is existing kv for the appended cell, 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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