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https://issues.apache.org/jira/browse/HBASE-10487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Feng Honghua updated HBASE-10487:
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Description: 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) (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 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))
> Avoid allocating new KeyValue and according 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, 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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