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https://issues.apache.org/jira/browse/BOOKKEEPER-664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13801527#comment-13801527
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Hudson commented on BOOKKEEPER-664:
-----------------------------------
SUCCESS: Integrated in bookkeeper-trunk #409 (See
[https://builds.apache.org/job/bookkeeper-trunk/409/])
BOOKKEEPER-664: Compaction increases latency on journal writes (ivank via
sijie) (sijie: rev 1534503)
* /zookeeper/bookkeeper/trunk/CHANGES.txt
* /zookeeper/bookkeeper/trunk/bookkeeper-server/conf/bk_server.conf
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/Bookie.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/EntryLogger.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/GarbageCollectorThread.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/InterleavedLedgerStorage.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/conf/ServerConfiguration.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/CompactionTest.java
> Compaction increases latency on journal writes
> ----------------------------------------------
>
> Key: BOOKKEEPER-664
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-664
> Project: Bookkeeper
> Issue Type: Bug
> Components: bookkeeper-server
> Affects Versions: 4.2.1
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Fix For: 4.2.2, 4.3.0
>
> Attachments:
> 0001-BOOKKEEPER-664-branch-4.2-Compaction-increases-laten.patch,
> 0001-BOOKKEEPER-664-branch-4.2-Compaction-increases-laten.patch,
> 0001-BOOKKEEPER-664-branch-4.2-Compaction-increases-laten.patch,
> 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.patch,
> 0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ.patch,
> 0001-BOOKKEEPER-664-Compaction-increases-latency-on-journ_trunk.patch,
> 0002-BOOKKEEPER-664-trunk-Compaction-increases-latency-on.patch, bench.png,
> BOOKKEEPER-664.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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