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https://issues.apache.org/jira/browse/HBASE-13916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14588327#comment-14588327
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Anoop Sam John commented on HBASE-13916:
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When hasArray is true, the array() API has to return a single byte[] where
whole data bytes available. So when the MBB contain more than one on heap
buffer we have no single array backing whole data.
> Create MultiByteBuffer
> ----------------------
>
> Key: HBASE-13916
> URL: https://issues.apache.org/jira/browse/HBASE-13916
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver, Scanners
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 2.0.0
>
> Attachments: HBASE-13916.patch
>
>
> This is an aggregation of N ByteBuffers. The block when served directly by
> block cache buckets memory, we have the block data split across multiple byte
> buffers. This aggregate type (like ByteBuffer) will serve the HFileBlock data.
> This jira wil just provide the new data structure
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