Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-26 Thread Bill Davidsen
Mr. James W. Laferriere wrote: Hello Gabor , On Tue, 20 Jun 2006, Gabor Gombas wrote: On Tue, Jun 20, 2006 at 03:08:59PM +0200, Niccolo Rigacci wrote: Do you know if it is possible to switch the scheduler at runtime? echo cfq > /sys/block//queue/scheduler At least one can do a

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-20 Thread Gabor Gombas
On Tue, Jun 20, 2006 at 08:00:13AM -0700, Mr. James W. Laferriere wrote: > At least one can do a ls of the /sys/block area & then do an > automated > echo cfq down the tree . Does anyone know of a method to set a > default > scheduler ? RTFM: Documentation/kernel-

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-20 Thread Niccolo Rigacci
> At least one can do a ls of the /sys/block area & then do an > automated > echo cfq down the tree . Does anyone know of a method to set a > default > scheduler ? My be I didn't understand the question... You decide what schedulers are available at kernel compile

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-20 Thread Mr. James W. Laferriere
Hello Gabor , On Tue, 20 Jun 2006, Gabor Gombas wrote: On Tue, Jun 20, 2006 at 03:08:59PM +0200, Niccolo Rigacci wrote: Do you know if it is possible to switch the scheduler at runtime? echo cfq > /sys/block//queue/scheduler At least one can do a ls of the /sys/block area & t

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-20 Thread Gabor Gombas
On Tue, Jun 20, 2006 at 03:08:59PM +0200, Niccolo Rigacci wrote: > Do you know if it is possible to switch the scheduler at runtime? echo cfq > /sys/block//queue/scheduler Gabor -- - MTA SZTAKI Computer and Automation Research I

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-20 Thread Niccolo Rigacci
On Mon, Jun 19, 2006 at 05:05:56PM +0200, Gabor Gombas wrote: > > IMHO a much better fix is to use the cfq I/O scheduler during the > rebuild. Yes, changing the default I/O to DEFAULT_CFQ solve the problem very well, I get over 40 Mb/s resync speed with no lock-up at all! Thank you very much,

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-19 Thread Gabor Gombas
On Wed, Jun 14, 2006 at 10:46:09AM -0500, Bill Cizek wrote: > I was able to work around this by lowering > /proc/sys/dev/raid/speed_limit_max to a value > below my disk thruput value (~ 50 MB/s) as follows: IMHO a much better fix is to use the cfq I/O scheduler during the rebuild. The default an

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-17 Thread Niccolo Rigacci
On Thursday 15 June 2006 12:13, you wrote: > If this is causing a lockup, then there is something else wrong, just > as any single process should not - by writing constantly to disks - be > able to clog up the whole system. > > Maybe if you could get the result of > alt-sysrq-P I tried some kern

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-15 Thread Neil Brown
On Thursday June 15, [EMAIL PROTECTED] wrote: > On Wed, Jun 14, 2006 at 10:46:09AM -0500, Bill Cizek wrote: > > Niccolo Rigacci wrote: > > > > >When the sync is complete, the machine start to respond again > > >perfectly. > > > > > I was able to work around this by lowering > > /proc/sys/dev/rai

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-15 Thread Niccolo Rigacci
On Wed, Jun 14, 2006 at 10:46:09AM -0500, Bill Cizek wrote: > Niccolo Rigacci wrote: > > >When the sync is complete, the machine start to respond again > >perfectly. > > > I was able to work around this by lowering > /proc/sys/dev/raid/speed_limit_max to a value > below my disk thruput value (~

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-14 Thread Bill Cizek
Niccolo Rigacci wrote: Hi to all, I have a new IBM xSeries 206m with two SATA drives, I installed a Debian Testing (Etch) and configured a software RAID as shown: Personalities : [raid1] md1 : active raid1 sdb5[1] sda5[0] 1951744 blocks [2/2] [UU] md2 : active raid1 sdb6[1] sda6[0]