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https://issues.apache.org/jira/browse/HBASE-11874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117404#comment-14117404
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Anoop Sam John commented on HBASE-11874:
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We deal with key as single buffer in HFileWriter and DBEs. A Cell coming in
would make us to recreate the key and copy rk, cf, qualifier, ts and type
bytes.
One way to solve this copy is to make a new Interface which contains
getKeyArray(), getKeyOffset(), getKeyLength() APIs. The impls like KeyValue,
where we have single buffer for the key can implement this Interface. In Writer
we can directly get the key when Cell is instance of this new interface. Else
we can make the key. We can have a util API in CellUtil to make the key from
Cell.
> Support Cell to be passed to StoreFile.Writer rather than KeyValue
> ------------------------------------------------------------------
>
> Key: HBASE-11874
> URL: https://issues.apache.org/jira/browse/HBASE-11874
> Project: HBase
> Issue Type: Sub-task
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 0.99.0
>
>
> This is the in write path and touches StoreFile.Writer, HFileWriter ,
> HFileDataBlockEncoder and different DataBlockEncoder impl.
> We will have to avoid KV#getBuffer() KV#getKeyOffset/Length() calls.
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