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https://issues.apache.org/jira/browse/HBASE-3209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930352#action_12930352
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HBase Review Board commented on HBASE-3209:
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Message from: "Nicolas" <[email protected]>
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trunk/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
<http://review.cloudera.org/r/1192/#comment6095>
I know. I'm a whitespace ASBO. sorry :(
trunk/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
<http://review.cloudera.org/r/1192/#comment6092>
we can work on fine-tuning this. +50% was a safe cover for us and worked
fine because we pre-split regions. Really, you probably don't need the pad
because the summation algorithm will operate on at least 3 storefiles, so
(assuming roughly even flush sizes) you get +100% pad from that.
trunk/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
<http://review.cloudera.org/r/1192/#comment6091>
s/are meet/have met/
- Nicolas
> New Compaction Heuristic
> ------------------------
>
> Key: HBASE-3209
> URL: https://issues.apache.org/jira/browse/HBASE-3209
> Project: HBase
> Issue Type: Improvement
> Reporter: Nicolas Spiegelberg
> Assignee: Nicolas Spiegelberg
>
> We have a whole bunch of compaction awesome in our internal 0.89 branch.
> Porting this to 0.90:
> 1) don't unconditionally compact 4 files. have a min threshold
> 2) intelligently upgrade minors to majors
> 3) new compaction algo (derived in HBASE-2462 )
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