Re: [Xen-users] HDD benchmarking

[Michael Schmidt <michael.schmidt@xxxxxxxxxx>]

Hi Andrew,

did you use LVM to provide diskspace to the DomUs, oder file-based-images?
With iostat (mostly included in package named sysstat) you can monitor 
the IOs and IO utilisation for each block device and partition.
If you need a benchmark to simulate random IOs, i can suggest you the 
tool sysbench (http://sysbench.sourceforge.net/).
Best Regards

Michael Schmidt

Am 11.05.10 16:07, schrieb Andrew Kilham:
> Hi,
>
> I currently have a server with two 15,000rpm SAS drives in RAID 1. I 
> am about to purchase a near identical server as I have run out of RAM 
> and HDD space in my first server, and I am interested in finding out 
> whether I can go for slower HDD's - ie I want to see if the HDD's in 
> my current server are maxed out.
> Is there any tool that I can use to benchmark/view the I/O stats of 
> the HDD's, not for a particular domain, but rather for the entire 
> physical server - ie I want to monitoring the physical HDD's instead 
> of a VM's HDD's. Can I do this through dom0? Can anyone tell me the 
> name of a program that can do this (CentOS 64bit)? And finally, is 
> there a way that I can tell the actual max throughput of my HDD's so I 
> can see how close to the limit they currently are?
> Cheers,
>
> Andrew
>
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