centos sleeping causes cluster problems
 

Greetings,

We run CentOS 5.4 under the Rocks clustering middleware.

Every time the cluster machines go to sleep, they must be hard-rebooted lest the cluster become magnificently slow. I am trying to find every kind of "sleep" that they can do, so I can turn sleep off completely.

I've done the -powersave off -blank 0 in /etc/rc.something file

Is one of the bios power settings likely to help? I'm using S1 right now. S3 seemed to be worse.

Are there other ways Centos goes to sleep? Or Pentium 4s?

THANKS

lanzcc

ACPI maybe?
 

Have you tried to reconfigure acpid? Here are instructions for configuring acpid options. Notice the brief suggestion at the beginning regarding the Gnome option, if you happen to be working in the GUI world. Otherwise, some information at the bottom of the article seems to allow reconfiguration of power-influencing events without recompiling the kernel.

Also CentOS has man pages for acpid.