[
https://issues.apache.org/jira/browse/CASSANDRA-2034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13094699#comment-13094699
]
Patricio Echague commented on CASSANDRA-2034:
---------------------------------------------
I fixed the test.
If I'm not wrong,
{code}
for (InetAddress host : hosts)
{
Message msg = new Message(host,
StorageService.Verb.REPLICATION_FINISHED, new byte[0],
MessagingService.version_);
MessagingService.instance().sendRR(msg,
FBUtilities.getBroadcastAddress());
}
{code}
sends 5 messages but some of them (4) are caught by a local SinkManager
implementation(for testing purposes) and not processed.
And since you added a wait for the callbacks to be processed before exiting, I
had to add a force shutdown (for testing purposes) in order to make the test
complete successfully.
> 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.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
