topic Re: disk throughput in Operating System - Linux

disk throughput

someone_4 — Fri, 18 Apr 2003 15:13:41 GMT

Hello,
Can someone tell me how can i meausre disk thouhgput on linux 7.2? I looked at bonnie but I dont think that it is going to do what i need it to do.

Thanks
Richard

Re: disk throughput

Vinit Adya — Fri, 18 Apr 2003 15:54:25 GMT

Hi Richard,

I dont fully understand your question.

Basic disk performance could be measured by
iostat

man iostat explains it in detail

Re: disk throughput

Ramkumar Devanathan — Fri, 18 Apr 2003 16:15:11 GMT

hi Richard,

Look at the features that the new OVPA Ver. 4(Performance agent) for linux offers. I don't know if it has been released.

i believe you can achieve what you want through it.

otherwise, you may try downloading and installing the beta version. speak to your HP contact person.

- ramd.

Re: disk throughput

Bill Douglass — Fri, 18 Apr 2003 20:00:37 GMT

What are you looking for? Bonnie can give you max throughput for your system. You can also do a quick-and-dirty

time dd if=/dev/zero of=/path/to/mounted/disk bs=1024k count=1000

Divide the file size by the time it takes to write to get a rough est. of bytes/sec.

If you want to profile your system, sar -b will give you stats on blocks/sec. You can collect info at 5 minute intervals over the course of a work day to get info. CHeck out the sar, sa1 and sa2 man pages.

Re: disk throughput

Michael Steele_2 — Fri, 18 Apr 2003 23:52:30 GMT

I think its all in the process of being ported over and not 'really' available until 9.0 with Advanced Server. My notes indicate only vmstat is available but I can't even find a man page for it for 7.2.

(* IDE controllers?? *)

Here's an 8.0 link though:

http://www.redhat.com/docs/manuals/linux/RHL-8.0-Manual/admin-primer/s1-resource-tools.html

Here's a 9.0 link:

http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/admin-primer/s1-resource-rhlspec.html

Re: disk throughput

Bill Douglass — Sat, 19 Apr 2003 00:39:56 GMT

Michael, iostat, vmstat and sar have been available at least since 7.1 (I don't have anything older to check):

piggy:/home/bdouglas> cat /etc/redhat-release
Red Hat Linux release 7.1 (Seawolf)
piggy:/home/bdouglas> rpm -q -f /usr/bin/vmstat
procps-2.0.7-8
piggy:/home/bdouglas> rpm -q -f /usr/bin/iostat
sysstat-3.3.5-3
piggy:/home/bdouglas> rpm -q -f /usr/bin/sar
sysstat-3.3.5-3

Or did I misunderstand your question?