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From "Vladimir Rodionov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14496) Compaction improvements: Delayed compaction
Date Sun, 27 Sep 2015 04:23:04 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vladimir Rodionov updated HBASE-14496:
--------------------------------------
    Summary: Compaction improvements: Delayed compaction  (was: Compaction improvements: delayed
compaction)

> Compaction improvements: Delayed compaction
> -------------------------------------------
>
>                 Key: HBASE-14496
>                 URL: https://issues.apache.org/jira/browse/HBASE-14496
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>
> Delayed compaction feature allows to specify maximum compaction delay for newly created
store files. Files will be eligible for compaction only if their age exceeds this delay. This
will allow to preserve new data in a block cache. For most applications, the newer the data
is the more frequently it is accessed. The frequent compactions of a new store files result
in high block cache churn rate and affects read performance and read latencies badly. 
> The configuration will be global, per table, per column family.



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