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https://issues.apache.org/jira/browse/BOOKKEEPER-1068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16024723#comment-16024723
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Hudson commented on BOOKKEEPER-1068:
------------------------------------
FAILURE: Integrated in Jenkins build bookkeeper-master #1760 (See
[https://builds.apache.org/job/bookkeeper-master/1760/])
BOOKKEEPER-1068: Expose ByteBuf in LedgerEntry to avoid data copy (eolivelli:
rev 7b1eec47092d0de6776c5a89575dbfc678165ee7)
* (edit)
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/DigestManager.java
* (edit)
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerHandleAdv.java
* (edit)
bookkeeper-server/src/test/java/org/apache/bookkeeper/client/ClientUtil.java
* (edit)
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/PendingReadOp.java
* (edit)
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerEntry.java
* (edit)
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerHandle.java
* (edit)
bookkeeper-server/src/main/java/org/apache/bookkeeper/client/LedgerFragmentReplicator.java
> Expose ByteBuf in LedgerEntry to avoid data copy
> ------------------------------------------------
>
> Key: BOOKKEEPER-1068
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-1068
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Matteo Merli
> Assignee: Matteo Merli
> Fix For: 4.5.0
>
>
> To avoid copying the entries payloads when writing/reading on a ledger and
> having to allocate a lot of byte[] on the JVM heap, we need to accept Netty
> ByteBuf buffer.
> By passing a ByteBuf, an application can use a pooled buffer, pointing to
> direct memory, to the {{LedgerHandle.addEntry()}} and have the same buffer
> forwarded on the connection sockets to the bookies.
> The same thing on the read side, {{LedgerEntry}} exposes an additional
> {{getEntryBuffer()}} method that can be used to get the underlying buffer and
> possibly forward that to some other connection, with zero-copy behavior
> (excluding getting data in-out of the kernel).
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