[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]


Hi Russell-

Can you give us a command to call (using bonnie++ binaries) that will give a more real-world test of filesystem and disk performance? I'd like to see how bonnie++ differs from hdparm in results.


On Sun, 1 Dec 2002 00:30, Thomas Kirk wrote:
 On Fri, Nov 29, 2002 at 05:07:16PM +0100, Nicolas Bougues wrote:
 > You should probably try to time the disk reads, not the buffer cache...
 > hdparm -t

 Yes the disk reads is a more realistic real world test :

  Timing buffer-cache reads:   128 MB in  1.23 seconds =104.07 MB/sec
 guf:~# hdparm -t /dev/sda5

hdparm is NOT a real world test!

In real world operation you use a file system not direct access to the device. Bonnie++ is one of many file system benchmarks that you can use to get
results that are more useful than hdparm.

If you want to look at the performance of a raw device then use zcav (part of
Bonnie++), it allows you to easily graph the varying performance across a

Reply to: