I have a cluster of 4 machines plus one machine to run nn & jt. I have heard that 5 or 6 is the magic #. I will see when I add the next batch of machines.

And it seems to running fine.

-Jogn

On Nov 26, 2009, at 11:38 AM, Yongqiang He <heyongqiang...@gmail.com> wrote:

I think it is definitely not a good idea to combine these two in production
environment.

Thanks
Yongqiang
On 11/26/09 6:26 AM, "Raymond Jennings III" <raymondj...@yahoo.com> wrote:

Do people normally combine these two processes onto one machine? Currently I have them on separate machines but I am wondering they use that much CPU processing time and maybe I should combine them and create another DataNode.







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