[CentOS] Correlate i/o with a process

[John R Pierce]

Mag Gam wrote:
> Hello:
>
> I have a server with 2 HBAs, and the users keeps complaining about 
> performance problems. My question is, how can I relate the process 
> with high I/O wait? Also, is it possible to see how much data is being 
> pushed thru by my 2 HBAs?

iostat (part of the sysstat package) will answer your 2nd question.

I dunno how to measure io wait time per process.  maybe IBM's NMON can 
do that, not sure, I haven't used it for a while.
http://www-941.haw.ibm.com/collaboration/wiki/display/WikiPtype/nmon