+--server-tuning
|   +--dd
|   +--fdtree
|   +--fs
|   +--loader
|   +--memcached
|   +--metadata
|   +--network
|   +--perflog
|   |   +--cron-perflog
|   |   +--sample-output
|   +--postgres
|   +--postmark
|   +--raid
|   +--ram
|   +--scaling
|   +--swap

Simple I/O testing using dd

==> io-performance <==

    http://serverfault.com/questions/219739/i-o-performance-benchmarking-linux
    I/O Performance Benchmarking Linux
    Fri, 7 Jan 2011 08:18:00 -0500
    
    For filesystem:
      Read test: dd if=/dev/zero of=/mount/test.dat bs=1M count=1024 oflag=direct
      Write test: dd if=/mount/test.dat of=/dev/null bs=1M count=1024 iflag=direct
    
      Note that even accessing a file, we are not using the buffer-cache.