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https://issues.apache.org/jira/browse/HBASE-14496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14948013#comment-14948013
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Hadoop QA commented on HBASE-14496:
-----------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12765489/HBASE-14496.v1.patch
against master branch at commit 7e30436e3fa84525b85b05b9e23cb01b2ada7c12.
ATTACHMENT ID: 12765489
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 2 new
or modified tests.
{color:green}+1 hadoop versions{color}. The patch compiles with all
supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.7.0
2.7.1)
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 protoc{color}. The applied patch does not increase the
total number of protoc compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 checkstyle{color}. The applied patch does not increase the
total number of checkstyle errors
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn post-site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/15908//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/15908//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/15908//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/15908//console
This message is automatically generated.
> Compaction improvements: Delayed compaction in RatioBasedCompactionPolicy
> -------------------------------------------------------------------------
>
> 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 for RatioBasedCompactionPolicy 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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