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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, 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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