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Parallel DD performance:

* Copy the local-script.sh in ${mountpoint}/benchmark/ directory
* Edit it so the blocksize and count are as per the requirements

* Edit the launch-script.sh script to make sure paths, mountpoints etc are 
  alright.

* run 'lauch-script.sh'

* after the run, you can get the aggregated result by adding all the 3rd entry 
  in output.$(hostname) entries in 'output/' directory.

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iozone:

bash# iozone - +m iozone_cluster.config - t 62 - r ${block_size} - s \
      ${file_size} - +n - i 0 - i 1

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rdd: random dd - tool to do a sequence of random block-sized continuous 
     read writes starting at a random offset

gcc -pthread rdd.c -o rdd

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glfs-bm: tool to benchmark small file performance

gcc glfs-bm.c -lglusterfsclient -o glfs-bm