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From "Ted Yu (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-4474) Use variable length format to store the memstoreTS
Date Wed, 12 Oct 2011 23:53:11 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu resolved HBASE-4474.
---------------------------

    Resolution: Duplicate

This has been covered in the latest patch for HBASE-2856
                
> Use variable length format to store the memstoreTS
> --------------------------------------------------
>
>                 Key: HBASE-4474
>                 URL: https://issues.apache.org/jira/browse/HBASE-4474
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Ted Yu
>             Fix For: 0.92.0
>
>
> HBASE-4344 introduced memstoreTS for KeyValues.
> The following suggestion was from Kannan:
> We should consider using variable length format to store the memstoreTS on disk. Also,
at the start of the flush, we can probably prune most of these timestamps to 0 since only
the ones that are higher than the current read point for all active scanners need to be maintained
at the fine grain level. So like often times, for a majority of the KVs, we might be able
to just write a 0. And hence, storing in varying width format would be an even bigger win.

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