Re: [CentOS] Question about iostat output

Pascal Robert wrote:

Hello,

We are planning to moving most of our servers to ESX but before buying our SAN, we want to do some I/O stats to see if iSCSI is enough or if we have to go with FC. So I found a plugin for Nagios that can log I/O stats with iostat. So far it's fine with single disk/one partition servers, but on our Oracle Database 10g server, we have two drives in RAID 1 (/dev/sda) and 4 other drives in RAID 10 (/dev/sdb). When I query iostat, I get :

I much prefer iostat -x, provides much more information, iostat by itself to me is pretty useless.

I don't even trust i/o stat on my bigger systems I query their performance from the array directly where I can get much better performance information where it really counts.

nate