Re: [CentOS] 3ware performance in CentOS

2008-06-30 Thread Florin Andrei
Jim Perrin wrote: Nope. This is just a long-standing performance thing. You can tune ext3 to perform better, but on a 3ware card xfs will win, hands down. Well, after performing more mental ruminations on this subject, restoring the database in case of a crash might be a pain, so I may have

RE: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Ross S. W. Walker
Florin Andrei wrote: > John R Pierce wrote: > > > > of course, XFS can also fail spectacularly.ext3fs fully journals all > > metadata updates. I'm sure this is a major portion of the performance > > differences on writes. > > Actually, I've used XFS since the days it was released as a po

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Florin Andrei
John R Pierce wrote: of course, XFS can also fail spectacularly.ext3fs fully journals all metadata updates. I'm sure this is a major portion of the performance differences on writes. Actually, I've used XFS since the days it was released as a port to Linux (and even before that, on Ir

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Joshua Baker-LePain
On Fri, 20 Jun 2008 at 10:34am, John R Pierce wrote Jim Perrin wrote: Nope. This is just a long-standing performance thing. You can tune ext3 to perform better, but on a 3ware card xfs will win, hands down. of course, XFS can also fail spectacularly.ext3fs fully journals all metadata up

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread John R Pierce
Jim Perrin wrote: Nope. This is just a long-standing performance thing. You can tune ext3 to perform better, but on a 3ware card xfs will win, hands down. of course, XFS can also fail spectacularly.ext3fs fully journals all metadata updates. I'm sure this is a major portion of the per

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Jim Perrin
On Fri, Jun 20, 2008 at 12:55 PM, Florin Andrei <[EMAIL PROTECTED]> wrote: >> Anyway, I did a test with the 2.6.18-93.el5.bz444759 kernel and there's no >> difference: 65 minutes, 27 MB/s. Looks like it doesn't matter which kernel I >> use, at least for this simple test with dd. No. Since you're

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Joshua Baker-LePain
On Fri, 20 Jun 2008 at 9:55am, Florin Andrei wrote Florin Andrei wrote: Anyway, I did a test with the 2.6.18-93.el5.bz444759 kernel and there's no difference: 65 minutes, 27 MB/s. Looks like it doesn't matter which kernel I use, at least for this simple test with dd. I wonder if a test clo

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Florin Andrei
Florin Andrei wrote: Anyway, I did a test with the 2.6.18-93.el5.bz444759 kernel and there's no difference: 65 minutes, 27 MB/s. Looks like it doesn't matter which kernel I use, at least for this simple test with dd. I wonder if a test closer to real life, such as reading/writing stuff from

Re: [CentOS] 3ware performance in CentOS

2008-06-20 Thread Johnny Hughes
Jim Perrin wrote: On Thu, Jun 19, 2008 at 1:55 PM, Florin Andrei <[EMAIL PROTECTED]> wrote: Have a look at these pages: http://www.bofh-hunter.com/2008/06/13/3ware-performance-in-centos/ https://bugzilla.redhat.com/show_bug.cgi?id=444759 I'm comparing the default 5.1 64bit kernel with the patc

Re: [CentOS] 3ware performance in CentOS

2008-06-19 Thread Florin Andrei
Joshua Baker-LePain wrote: That's the wrong patched kernel. You'd need to be using one of the kernels in -- kernel-2.6.18-93.el5.bz444759.x86_64.rpm. (facepalm) Thanks for setting me right. Anyway, I did a test with the 2.6.18-93.el5.bz444759 kerne

Re: [CentOS] 3ware performance in CentOS

2008-06-19 Thread Jim Perrin
On Thu, Jun 19, 2008 at 4:05 PM, Ruslan Sivak <[EMAIL PROTECTED]> wrote: > > How would I know if I'm affected by this bug? I'm using the 9690SA > controller. > Russ Mostly, if you're using the stock 3w9xxx module that comes in centos, you're affected. If you're using the 3ware driver from 3ware/

Re: [CentOS] 3ware performance in CentOS

2008-06-19 Thread Ruslan Sivak
Jim Perrin wrote: On Thu, Jun 19, 2008 at 1:55 PM, Florin Andrei <[EMAIL PROTECTED]> wrote: Have a look at these pages: http://www.bofh-hunter.com/2008/06/13/3ware-performance-in-centos/ https://bugzilla.redhat.com/show_bug.cgi?id=444759 I'm comparing the default 5.1 64bit kernel with the p

Re: [CentOS] 3ware performance in CentOS

2008-06-19 Thread Jim Perrin
On Thu, Jun 19, 2008 at 1:55 PM, Florin Andrei <[EMAIL PROTECTED]> wrote: > Have a look at these pages: > > http://www.bofh-hunter.com/2008/06/13/3ware-performance-in-centos/ > https://bugzilla.redhat.com/show_bug.cgi?id=444759 > > I'm comparing the default 5.1 64bit kernel with the patched one pos

Re: [CentOS] 3ware performance in CentOS

2008-06-19 Thread Joshua Baker-LePain
On Thu, 19 Jun 2008 at 10:55am, Florin Andrei wrote Have a look at these pages: http://www.bofh-hunter.com/2008/06/13/3ware-performance-in-centos/ https://bugzilla.redhat.com/show_bug.cgi?id=444759 I'm comparing the default 5.1 64bit kernel with the patched one posted in the bug report (kerne

Re: [CentOS] 3ware performance in CentOS

2008-06-19 Thread Akemi Yagi
On Thu, Jun 19, 2008 at 10:55 AM, Florin Andrei <[EMAIL PROTECTED]> wrote: > Have a look at these pages: > > http://www.bofh-hunter.com/2008/06/13/3ware-performance-in-centos/ > https://bugzilla.redhat.com/show_bug.cgi?id=444759 > > I'm comparing the default 5.1 64bit kernel with the patched one po