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From Shirley Cohen <sco...@cs.utexas.edu>
Subject dfs i/o stats
Date Mon, 29 Sep 2008 23:42:36 GMT
Hi,

I would like to measure the disk i/o performance of our hadoop  
cluster. However, running iostat on 16 nodes is rather cumbersome.  
Does dfs keep track of any stats like the number of blocks or bytes  
read and written? From scanning the api, I found a class called  
"org.apache.hadoop.fs.FileSystem.Statistics" that could be relevant.  
Does anyone know if this is what I'm looking for?

Thanks,

Shirley

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