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Posted to issues@hbase.apache.org by "Phabricator (Updated) (JIRA)" <ji...@apache.org> on 2011/12/01 00:35:41 UTC
[jira] [Updated] (HBASE-4463) Run more aggressive compactions
during off peak hours
[ https://issues.apache.org/jira/browse/HBASE-4463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Phabricator updated HBASE-4463:
-------------------------------
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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