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https://issues.apache.org/jira/browse/BOOKKEEPER-565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13836750#comment-13836750
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Hudson commented on BOOKKEEPER-565:
-----------------------------------
SUCCESS: Integrated in bookkeeper-trunk #459 (See
[https://builds.apache.org/job/bookkeeper-trunk/459/])
BOOKKEEPER-565: Make an option to separate storing entry log files from index
files. (sijie via ivank) (ivank: rev 1547123)
* /zookeeper/bookkeeper/trunk/CHANGES.txt
*
/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/BookieShell.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/bookie/LedgerDirsManager.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/ReadOnlyEntryLogger.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/BookieInitializationTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/CompactionTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/CreateNewLogTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/EntryLogTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/LedgerCacheTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/TestLedgerDirsManager.java
> Make an option to separate storing entry log files from index files.
> --------------------------------------------------------------------
>
> Key: BOOKKEEPER-565
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-565
> Project: Bookkeeper
> Issue Type: Sub-task
> Components: bookkeeper-server
> Reporter: Sijie Guo
> Assignee: Sijie Guo
> Fix For: 4.3.0
>
> Attachments: BOOKKEEPER-565.diff
>
>
> Currently, the add operation will go throughput ledger storage first and
> journal later. the latency of an add operation would be affected by two
> parts, one is ledger disk and the other one is journal disk. And flushing
> ledger index files might cause random i/o, which would affect adding entries
> to ledger storage in a higher workload.
> there are several ideas to resolve this problem, one is aggregate the
> per-file index into several files to make flushing more sequential.
> this jira is a simple solution to separate the disks to avoid disk
> contention. it is a straightforward way w/ less risk, but not a perfect way
> which might waste an extra disk and bandwidth.
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