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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7162) Prefix Compression - Trie data block encoding; hbase-common and hbase-server changes
Date Wed, 21 Nov 2012 04:21:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13501696#comment-13501696
] 

Enis Soztutar commented on HBASE-7162:
--------------------------------------

bq. Turns out that (in our scenario) 60% of the time was spent is just allocating ByteBuffer
to back the decoded KeyValues where it would have been sufficient to just create a KV interface
that points to an existing buffer for the key and existing buffer for the value.
Does 60% include just the allocation, or allocation + deserialization/copy. I was also thinking
along the lines of keeping just the pointers to the block cache for KV's, and only deserializing
them to the socket buffers. 
                
> Prefix Compression - Trie data block encoding; hbase-common and hbase-server changes
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-7162
>                 URL: https://issues.apache.org/jira/browse/HBASE-7162
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.96.0
>            Reporter: stack
>            Assignee: Matt Corgan
>             Fix For: 0.96.0
>
>         Attachments: HBASE-4676-common-and-server-v8.patch, HBASE-4676-common-and-server-v9.patch,
HBASE-7162-common-and-server-v10.patch
>
>
> These are the hbase-common and hbase-server changes for hbase-4676 Prefix Compression
- Trie data block encoding.

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