Re: disk i/o performance problem

2007-06-02 Thread Douglas Allan Tutty
On Sat, Jun 02, 2007 at 12:12:50PM -0400, Roberto C. Sánchez wrote: > -T Perform timings of cache reads for benchmark and comparison pur- >poses. For meaningful results, this operation should be >repeated 2-3 times on an otherwise inactive system (no other >

Re: disk i/o performance problem

2007-06-02 Thread Roberto C . Sánchez
On Sat, Jun 02, 2007 at 12:08:06PM -0400, Douglas Allan Tutty wrote: > On Sat, Jun 02, 2007 at 11:58:00AM -0400, Roberto C. Sánchez wrote: > > On Sat, Jun 02, 2007 at 10:54:51AM -0400, Douglas Allan Tutty wrote: > > > On Thu, May 31, 2007 at 11:02:06PM -0400, WHIRLYCOTT wrote: > > > > Etch: (output

Re: disk i/o performance problem

2007-06-02 Thread Douglas Allan Tutty
On Sat, Jun 02, 2007 at 11:58:00AM -0400, Roberto C. Sánchez wrote: > On Sat, Jun 02, 2007 at 10:54:51AM -0400, Douglas Allan Tutty wrote: > > On Thu, May 31, 2007 at 11:02:06PM -0400, WHIRLYCOTT wrote: > > > Etch: (output of hdparm) > > > > > > /dev/sda: > > > Timing cached reads: 1588 MB i

Re: disk i/o performance problem

2007-06-02 Thread Roberto C . Sánchez
On Sat, Jun 02, 2007 at 10:54:51AM -0400, Douglas Allan Tutty wrote: > On Thu, May 31, 2007 at 11:02:06PM -0400, WHIRLYCOTT wrote: > > Etch: (output of hdparm) > > > > /dev/sda: > > Timing cached reads: 1588 MB in 2.00 seconds = 794.41 MB/sec > > Timing buffered disk reads: 176 MB

Re: disk i/o performance problem

2007-06-02 Thread Douglas Allan Tutty
On Thu, May 31, 2007 at 11:02:06PM -0400, WHIRLYCOTT wrote: > Etch: (output of hdparm) > > /dev/sda: > Timing cached reads: 1588 MB in 2.00 seconds = 794.41 MB/sec > Timing buffered disk reads: 176 MB in 3.03 seconds = 58.15 MB/sec > CentOS: (output of hdparm) > >

Re: disk i/o performance problem

2007-05-31 Thread Alex Samad
On Thu, May 31, 2007 at 11:02:06PM -0400, WHIRLYCOTT wrote: > Hi, I'm trying to track down a pretty apparent problem that I'm > having with disk i/o on an Etch box. Basically, I have two identical > machines. One is running Etch and one is running CentOS. The Etch > machine is really slow.

disk i/o performance problem

2007-05-31 Thread WHIRLYCOTT
Hi, I'm trying to track down a pretty apparent problem that I'm having with disk i/o on an Etch box. Basically, I have two identical machines. One is running Etch and one is running CentOS. The Etch machine is really slow. I'm trying to figure out why. Details are as follows: Etch: (