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From Harsh J <qwertyman...@gmail.com>
Subject Re: Scheduler in Hadoop MR
Date Tue, 14 Dec 2010 17:42:36 GMT
On Thu, Dec 9, 2010 at 4:06 AM, Allen Wittenauer
<awittenauer@linkedin.com> wrote:
>
> On Dec 7, 2010, at 6:47 PM, Harsh J wrote:
>>> 1 - When we've two JobTrackers running simultaneously, each JobTracker is
>>> running in a separate process?
>>
>> You can't run simultaneous JobTrackers for the same data-cluster
>> AFAIK; only one JT process can exist. Did you mean jobs?
>
>        Sure you can.
>
>        Configure the task trackers to talk to specific job trackers.   This does,
however, have a very negative impact on data locality.

Ah, so multiple JTs can use a common HDFS cluster? Or did you mean
different clusters entirely, co-existing?

>
>



-- 
Harsh J
www.harshj.com

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