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https://issues.apache.org/jira/browse/HBASE-4463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phabricator updated HBASE-4463:
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Attachment: HBASE-4463.D471.2.patch
Karthik updated the revision "HBASE-4463 [jira] Run more aggressive compactions
during off peak hours".
Reviewers: JIRA, Kannan, nspiegelberg, mbautin, stack
Fixed Nicolas' comment about the time computation in the unit test.
Fixed Ted's comment about repeated compact selection line.
REVISION DETAIL
https://reviews.facebook.net/D471
AFFECTED FILES
src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactSelection.java
src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactionRequest.java
src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactSelection.java
> Run more aggressive compactions during off peak hours
> -----------------------------------------------------
>
> Key: HBASE-4463
> URL: https://issues.apache.org/jira/browse/HBASE-4463
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Karthik Ranganathan
> Assignee: Karthik Ranganathan
> Attachments: HBASE-4463.D471.1.patch, HBASE-4463.D471.2.patch
>
>
> The number of iops on the disk and the top of the rack bandwidth utilization
> at off peak hours is much lower than at peak hours depending on the
> application usage pattern. We can utilize this knowledge to improve the
> performance of the HBase cluster by increasing the compact selection ratio to
> a much larger value during off-peak hours than otherwise - increasing
> hbase.hstore.compaction.ratio (1.2 default) to
> hbase.hstore.compaction.ratio.offpeak (5 default). This will help reduce the
> average number of files per store.
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