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https://issues.apache.org/jira/browse/HBASE-14496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14947858#comment-14947858
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Vladimir Rodionov commented on HBASE-14496:
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The existing patch enhances ExploringCompactionPolicy by adding controllable
compaction delay feature. New config option was introduced:
*hbase.hstore.compaction.delay* (in seconds). Default, 0 - no delay.
> 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
> Attachments: HBASE-14496.v1.patch
>
>
> 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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