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https://issues.apache.org/jira/browse/HBASE-11934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Enis Soztutar updated HBASE-11934:
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Fix Version/s: (was: 0.99.1)
0.99.0
> Support KeyValueCodec to encode non KeyValue cells.
> ---------------------------------------------------
>
> Key: HBASE-11934
> URL: https://issues.apache.org/jira/browse/HBASE-11934
> Project: HBase
> Issue Type: Sub-task
> Components: Performance, regionserver, Scanners
> Affects Versions: 0.99.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Critical
> Fix For: 0.99.0, 2.0.0
>
> Attachments: HBASE-11934.patch
>
>
> We have KeyValueCodec as the default RPC codec now. This can only encode
> KeyValue types and need to convert any non KV cell to KeyValue format. This
> is a expensive op.
> {code}
> // This is crass and will not work when KV changes. Also if passed a non-kv
> Cell, it will
> // make expensive copy.
> // Do not write tags over RPC
> KeyValue.oswrite((KeyValue) KeyValueUtil.ensureKeyValue(cell), this.out,
> false);
> {code}
> Now we want Cell to be in entire read path and don't want any copy until we
> write the cell to client.
> The optimization done in the DBE of avoiding copying of value bytes was also
> not getting real advantage bacause of this ensureKeyValue() call at the Codec.
> We can encode and write non KeyValue cells with KV serialization format and
> avoid the recreate.
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