Re: [Beowulf] Green Cluster?

2008-07-23 Thread fkruggel
Thanks for your suggestions. Let me be more specific. I would like to have nodes automatically wake up when needed and go to sleep when idle for some time. My ganglia logs tell me that there is considerable idle time on our cluster. The issue is that I would like to have the cluster adapt *automati

[Beowulf] Green Cluster?

2008-07-19 Thread fkruggel
Hi All, I am wondering whether there is any mechanism to automatically power down nodes (e.g., ACPI S3) when idle for some time, and automatically wake up when requested (e.g., by WOL, some cluster scheduler, ssh). I imagine that I could cut down power & cooling on our system by more than 50%. An