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From "Bob Nilsen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8313) cassandra-stress: No way to pass in data center hint for DCAwareRoundRobinPolicy
Date Fri, 14 Nov 2014 15:23:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14212373#comment-14212373
] 

Bob Nilsen commented on CASSANDRA-8313:
---------------------------------------

Thanks for the help, Michael.

I believe the problem is that DCAwareRoundRobinPolicy() needs a 'DC1' hint in the constructor,
otherwise it'll pick a DC based on the order of the list returned by the cluster.

It would seem best (in my opinion) to let the user select the LoadBalancingPolicy (and any
arguments to pass to it) via command line options.

I'll do some more testing with the -node option and let you know what I find.

> cassandra-stress: No way to pass in data center hint for DCAwareRoundRobinPolicy
> --------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8313
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8313
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Bob Nilsen
>
> When using cassandra-stress in a multiple datacenter configuration, we need to be able
to behave like the applications do and send traffic to nodes co-located in the same data center.
> I can't for the life of me figure out how to pass in such a hint into the new cassandra-stress.
> And passing in a local node into "-node" doesn't help.  Apparently, cassandra-stress
will *guess* the data center based on the order of the list that it receives from the cluster.
> In my case, it seems to always pick 'DC2', no matter what I do.
> INFO  22:17:06 Using data-center name 'DC2' for DCAwareRoundRobinPolicy (if this is incorrect,
please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
> Could someone please add the ability to configure the DCAwareRoundRobinPolicy with a
data center hint?



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