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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-11870) Optimization : Avoid copy of key and value for tags addition in AC and VC
Date Mon, 01 Sep 2014 06:04:21 GMT
Anoop Sam John created HBASE-11870:
--------------------------------------

             Summary: Optimization : Avoid copy of key and value for tags addition in AC and
VC
                 Key: HBASE-11870
                 URL: https://issues.apache.org/jira/browse/HBASE-11870
             Project: HBase
          Issue Type: Improvement
          Components: Performance, security
    Affects Versions: 0.98.0
            Reporter: Anoop Sam John
            Assignee: Anoop Sam John


In AC and VC we have to add the per cell ACL tags/ visibility tags to Cells. We get KeyValue
objects and which need one backing array with key,value and tags. So in order to add a tag
we have to recreate buffer the and copy the entire key , value and tags.  We can avoid this
Create a new Cell impl which wraps the original Cell and fro the non tag parts just refer
this old buffer.
This will contain a byte[] state for the tags part.
Also we have to ensure we deal with Cells n write path not KV.




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