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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/04/25 00:57:30 UTC

[jira] Updated: (HBASE-1011) Keep data in Memcache until specified TTL or memory pressure

     [ https://issues.apache.org/jira/browse/HBASE-1011?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-1011:
-------------------------

    Fix Version/s:     (was: 0.20.0)

Non-critical feature.  Moving out of 0.20.0.

> Keep data in Memcache until specified TTL or memory pressure
> ------------------------------------------------------------
>
>                 Key: HBASE-1011
>                 URL: https://issues.apache.org/jira/browse/HBASE-1011
>             Project: Hadoop HBase
>          Issue Type: New Feature
>            Reporter: Jonathan Gray
>
> In thinking about ways to improve random-read access, a very typical access pattern for web sites is to primarily be retrieving from new records but having a much larger total dataset in a given table.
> If you could specify a Memcache flush TTL, you could keep "past 24 hours" in memory and this would give you a sliding window updated on memcache flushes.  Must also adapt to regionserver memory pressure.

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