WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] RAID10 Array

Hi!

> Can you suggest a way I could benchmark all these things? I've never
> benchmarked Hard Drives before..
As mentioned in my previous mail -- use (for example) fio to do benchmarks.  
Before you start with benchmarking I suggest to read the following slides:
http://www.pgcon.org/2009/schedule/attachments/123_pg-benchmarking-2.pdf
There are many very clever hints in this document. Getting benchmarking
right is very hard and giving general statements about performance is
(close to) impossible... ;-)
Just one more thing: You cannot compare local benchmarks to benchmarks of
iSCSI/AoE targets. Devices connected to your local bus have a way lower
latency! This results in lower throughput mainly. RAID0 on local disks
gives way higher throughput in terms of MBps than network storage. Therefor
"IOPS" were invented... ;-)

Feel free to ask, if you need more specific hints on how to conduct
benchmarks... I have recently done some work in this area.

-- Adi

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>