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https://issues.apache.org/jira/browse/CASSANDRA-2034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13094888#comment-13094888
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Hudson commented on CASSANDRA-2034:
-----------------------------------
Integrated in Cassandra #1063 (See
[https://builds.apache.org/job/Cassandra/1063/])
generate hints for replicas that timeout
patch by Patricio Echague and jbellis for CASSANDRA-2034
jbellis :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1163760
Files :
* /cassandra/trunk/CHANGES.txt
*
/cassandra/trunk/src/java/org/apache/cassandra/concurrent/CreationTimeAwareFuture.java
* /cassandra/trunk/src/java/org/apache/cassandra/db/RowMutation.java
* /cassandra/trunk/src/java/org/apache/cassandra/db/RowMutationVerbHandler.java
*
/cassandra/trunk/src/java/org/apache/cassandra/locator/AbstractReplicationStrategy.java
* /cassandra/trunk/src/java/org/apache/cassandra/net/CallbackInfo.java
* /cassandra/trunk/src/java/org/apache/cassandra/net/MessagingService.java
* /cassandra/trunk/src/java/org/apache/cassandra/net/ResponseVerbHandler.java
*
/cassandra/trunk/src/java/org/apache/cassandra/service/AbstractWriteResponseHandler.java
*
/cassandra/trunk/src/java/org/apache/cassandra/service/DatacenterSyncWriteResponseHandler.java
*
/cassandra/trunk/src/java/org/apache/cassandra/service/DatacenterWriteResponseHandler.java
*
/cassandra/trunk/src/java/org/apache/cassandra/service/IWriteResponseHandler.java
* /cassandra/trunk/src/java/org/apache/cassandra/service/StorageProxy.java
* /cassandra/trunk/src/java/org/apache/cassandra/service/StorageProxyMBean.java
* /cassandra/trunk/src/java/org/apache/cassandra/service/StorageService.java
*
/cassandra/trunk/src/java/org/apache/cassandra/service/WriteResponseHandler.java
* /cassandra/trunk/src/java/org/apache/cassandra/utils/ExpiringMap.java
* /cassandra/trunk/src/java/org/apache/cassandra/utils/FBUtilities.java
*
/cassandra/trunk/test/unit/org/apache/cassandra/service/ConsistencyLevelTest.java
* /cassandra/trunk/test/unit/org/apache/cassandra/service/RemoveTest.java
> Make Read Repair unnecessary when Hinted Handoff is enabled
> -----------------------------------------------------------
>
> Key: CASSANDRA-2034
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2034
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Patricio Echague
> Fix For: 1.0
>
> Attachments: 2034-formatting.txt, 2034-v16.txt, 2034-v17.txt,
> 2034-v18.txt, 2034-v19-rebased.txt, 2034-v19.txt, 2034-v20.txt, 2034-v21.txt,
> CASSANDRA-2034-trunk-v10.patch, CASSANDRA-2034-trunk-v11.patch,
> CASSANDRA-2034-trunk-v11.patch, CASSANDRA-2034-trunk-v12.patch,
> CASSANDRA-2034-trunk-v13.patch, CASSANDRA-2034-trunk-v14.patch,
> CASSANDRA-2034-trunk-v15.patch, CASSANDRA-2034-trunk-v2.patch,
> CASSANDRA-2034-trunk-v3.patch, CASSANDRA-2034-trunk-v4.patch,
> CASSANDRA-2034-trunk-v5.patch, CASSANDRA-2034-trunk-v6.patch,
> CASSANDRA-2034-trunk-v7.patch, CASSANDRA-2034-trunk-v8.patch,
> CASSANDRA-2034-trunk-v9.patch, CASSANDRA-2034-trunk.patch
>
> Original Estimate: 8h
> Remaining Estimate: 8h
>
> Currently, HH is purely an optimization -- if a machine goes down, enabling
> HH means RR/AES will have less work to do, but you can't disable RR entirely
> in most situations since HH doesn't kick in until the FailureDetector does.
> Let's add a scheduled task to the mutate path, such that we return to the
> client normally after ConsistencyLevel is achieved, but after RpcTimeout we
> check the responseHandler write acks and write local hints for any missing
> targets.
> This would making disabling RR when HH is enabled a much more reasonable
> option, which has a huge impact on read throughput.
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