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From Doug Cutting <cutt...@apache.org>
Subject Re: Question on DFS block placement and 'what is a rack' wrt DFS block placement
Date Tue, 12 Feb 2008 21:25:40 GMT
Jason Venner wrote:
> Is disk arm contention (seek) a problem in a 6 disk configuration as 
> most likely all of the disks would be serving /local/ and /dfs/?

It should not be.  MapReduce i/o is is sequential, in chunks large 
enough that seeks should not dominate.


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