Not sure how much this has improved with the cpu-scaling work in 2.x, but in general faster processors are much better than more processors.
Peak performance has been in the range of 4-8 cores, with performance dropping after that due to lock contention. 12 cores/node should still be fine, but certainly a faster-per-core quad core is likely preferable to a hex-core CPU. OSS nodes need a good IO/memory subsystem most. Bull used some large NUMA machines, but there are additional complications using eg, multiple IB HCAs for performance, so generally the 2-socket range is optimal. Kevin On Dec 6, 2011, at 11:57 PM, Oleg Drokin wrote: > Hello! > > On Dec 6, 2011, at 3:44 PM, Sebastian Gutierrez wrote: >> Is there any recommendations on whether or not to use 6core Intel CPUs for >> the Lustre OSS or MDS nodes? > > While on MDs you do want to have as powerful machine as you can since there > is only one, > I think cpu is not a bottleneck on OSSes. > Of course you still can install faster CPUs on OSSes, but I think your money > would be better spent on memory instead. > > Bye, > Oleg > -- > Oleg Drokin > Senior Software Engineer > Whamcloud, Inc. > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss Confidentiality Notice: This e-mail message, its contents and any attachments to it are confidential to the intended recipient, and may contain information that is privileged and/or exempt from disclosure under applicable law. If you are not the intended recipient, please immediately notify the sender and destroy the original e-mail message and any attachments (and any copies that may have been made) from your system or otherwise. Any unauthorized use, copying, disclosure or distribution of this information is strictly prohibited. _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
