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From Alicia Leong <lccali...@gmail.com>
Subject Re: Vnodes - HUNDRED of MapReduce jobs
Date Thu, 28 Mar 2013 14:09:27 GMT
Thanks Cem for your confirmation on this.

I guess, Login > Create Issue at
https://issues.apache.org/jira/browse/CASSANDRA




On Thu, Mar 28, 2013 at 9:40 PM, cem <cayiroglu@gmail.com> wrote:

> Hi Alicia ,
>
> Cassandra input format creates mappers as many as vnodes. It is a known
> issue. You need to lower the number of vnodes :(
>
> I have a simple solution for that and ready to write a patch. Should I
> create a ticket about that? I don't know the procedure about that.
>
>  Regards,
> Cem
>
>
> On Thu, Mar 28, 2013 at 2:30 PM, Alicia Leong <lccalicia@gmail.com> wrote:
>
>> Hi All,
>>
>> I have 3 nodes of Cassandra 1.2.3 & edited the cassandra.yaml for vnodes.
>>
>> When I execute a M/R job .. the console showed HUNDRED of Map tasks.
>>
>> May I know, is the normal since is vnodes?  If yes, this have slow the
>> M/R job to finish/complete.
>>
>>
>> Thanks
>>
>
>

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