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https://issues.apache.org/jira/browse/BOOKKEEPER-664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747412#comment-13747412
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Hadoop QA commented on BOOKKEEPER-664:
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Testing JIRA BOOKKEEPER-664
Patch
[0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ_trunk.patch|https://issues.apache.org/jira/secure/attachment/12599405/0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ_trunk.patch]
downloaded at Thu Aug 22 09:51:30 UTC 2013
----------------------------
{color:green}+1 PATCH_APPLIES{color}
{color:green}+1 CLEAN{color}
{color:red}-1 RAW_PATCH_ANALYSIS{color}
. {color:green}+1{color} the patch does not introduce any @author tags
. {color:green}+1{color} the patch does not introduce any tabs
. {color:green}+1{color} the patch does not introduce any trailing spaces
. {color:green}+1{color} the patch does not introduce any line longer than
120
. {color:red}-1{color} the patch does not add/modify any testcase
{color:green}+1 RAT{color}
. {color:green}+1{color} the patch does not seem to introduce new RAT
warnings
{color:green}+1 JAVADOC{color}
. {color:green}+1{color} the patch does not seem to introduce new Javadoc
warnings
{color:green}+1 COMPILE{color}
. {color:green}+1{color} HEAD compiles
. {color:green}+1{color} patch compiles
. {color:green}+1{color} the patch does not seem to introduce new javac
warnings
{color:green}+1 FINDBUGS{color}
. {color:green}+1{color} the patch does not seem to introduce new Findbugs
warnings
{color:green}+1 TESTS{color}
. Tests run: 877
{color:green}+1 DISTRO{color}
. {color:green}+1{color} distro tarball builds with the patch
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{color:red}*-1 Overall result, please check the reported -1(s)*{color}
The full output of the test-patch run is available at
. https://builds.apache.org/job/bookkeeper-trunk-precommit-build/469/
> Compaction increases latency on journal writes
> ----------------------------------------------
>
> Key: BOOKKEEPER-664
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-664
> Project: Bookkeeper
> Issue Type: Bug
> Affects Versions: 4.2.1
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Fix For: 4.2.2, 4.3.0
>
> Attachments:
> 0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ_branch4.2.patch,
> 0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ-branch-4.2.patch,
> 0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ.patch,
> 0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ_trunk.patch
>
>
> Compaction writes to the journal to avoid data loss (see BOOKKEEPER-530).
> BOOKKEEPER-530 correctly identified that this may affect latency on the
> journal but we have observed this since in production. It is possible to
> avoid the journal completely, as twitter do in their github branch.
> Basically, we need to write to the entrylogger first, flush the entry log and
> then add to the index.
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