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From rajgopalv <raja.f...@gmail.com>
Subject Multiple directories for hadoop
Date Mon, 17 Jan 2011 15:01:27 GMT

I have a doubt in configuring dfs.data.dir,

One of my slave has 4 500GB harddisks. They are mounted on different mount
points : /data1 /data2 /data3 /data4
How can i make use of all the 4 harddisks for hdfs data and local jobcahe ? 

if i give comma seperated values for dfs.data.dir, will the total data be
replicated on all the 4 disks? , or the total data will be shared on the 4
disks (without replication) ? 

And, how to increase the space for local jobcache? 
says hadoop.tmp.dir cannot be comma seperated.  But my mapreduce jobs will
eat a lot of jobcache in the local.

How should the configurartion be for the above scenario? 

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