Re: [zfs-discuss] ZFS pegging the system

2009-07-17 Thread Louis-Frédéric Feuillette
On Thu, 2009-07-16 at 10:51 -0700, Jeff Haferman wrote: > We have a SGE array task that we wish to run with elements 1-7. > Each task generates output and takes roughly 20 seconds to 4 minutes > of CPU time. We're doing them on a machine with about 144 8-core nodes, > and we've divvied the

Re: [zfs-discuss] ZFS pegging the system

2009-07-17 Thread Scott Laird
Have each node record results locally, and then merge pair-wise until a single node is left with the final results? If you can do merges that way while reducing the size of the result set, then that's probably going to be the most scalable way to generate overall results. On Thu, Jul 16, 2009 at

[zfs-discuss] ZFS pegging the system

2009-07-16 Thread Jeff Haferman
We have a SGE array task that we wish to run with elements 1-7. Each task generates output and takes roughly 20 seconds to 4 minutes of CPU time. We're doing them on a machine with about 144 8-core nodes, and we've divvied the job up to do about 500 at a time. So, we have 500 jobs at a t