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https://issues.apache.org/jira/browse/BOOKKEEPER-137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204696#comment-13204696
]
Hudson commented on BOOKKEEPER-137:
-----------------------------------
Integrated in bookkeeper-trunk #353 (See
[https://builds.apache.org/job/bookkeeper-trunk/353/])
BOOKKEEPER-137: Do not create Ledger index files until absolutely
necessary. (ivank)
ivank :
Files :
* /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/FileInfo.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/JournalChannel.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/LedgerCache.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/LedgerDescriptor.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/proto/BookieServer.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/main/java/org/apache/bookkeeper/util/LocalBookKeeper.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/BookieJournalTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/BookieLayoutVersionTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/client/BookieRecoveryTest.java
*
/zookeeper/bookkeeper/trunk/bookkeeper-server/src/test/java/org/apache/bookkeeper/test/BaseTestCase.java
> Do not create Ledger index files until absolutely necessary.
> ------------------------------------------------------------
>
> Key: BOOKKEEPER-137
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-137
> Project: Bookkeeper
> Issue Type: Bug
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Fix For: 4.1.0
>
> Attachments: BOOKKEEPER-137.diff, BOOKKEEPER-137.diff,
> BOOKKEEPER-137.diff, BOOKKEEPER-137.diff, BOOKKEEPER-137.diff
>
>
> This is an optimization to speed up the case where we have many ledgers and
> are writing to them at random (a benchmark case we currently have).
> Currently, we create the ledger index file and write the first 1k of it to
> disk immediately. With a lot of ledgers being randomly written to, this means
> a lot of random writes on the ledger disk. This fix postpones the creation of
> the index file and writing of the first 1k until the first flush of the
> ledger.
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