Hi Bruce, No I did not specify the # of open mp threads on the recon-all cmd line. These run times were obtained by running one subject per core. for example cc2.8xlarge has 8 cores and so we ran 8 subjects at once; Thanks for the info about the # of open mp threads options; I will look into it.
One other note: Bruce, Nick did you improve the memory management in 5.2 ? On our local machine we noticed we can run 6 subjects simultaneously even though we only have 12gb of ram. I thought some of the them might crash since we only have 2gb per subject but no crashes so far over 30 subjects.. Mehul On Fri, Feb 1, 2013 at 7:12 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu>wrote: > Hi Mehul > > did you specify the # of open mp threads on the recon-all cmd line? > cheers > Bruce > > On Fri, 1 Feb 2013, Mehul Sampat wrote: > > Hi Folks, >> Just wanted to share our experience with running FS 5.2-beta on Amazon Web >> Services (AWS). >> Basically, AWS has multiple instance types >> (http://aws.amazon.com/ec2/**instance-types/<http://aws.amazon.com/ec2/instance-types/>) >> and we were trying to figure out >> the most cost-effective approach. >> >> We ran two subjects through FS 5.2-beta on M1 Large Instance (m1.large) >> and Cluster Compute Eight Extra Large Instance (cc2.8xlarge). (same >> subjects >> run on both instance). We expected cc2.8xlarge to be faster (but it is >> also >> more expensive: $2.4 per hour; 8 cores); The run-times we got: >> >> instance-type subject start-time end-time run-time >> m1.large subject-1 01:05:44 UTC 2013 15:40:45 UTC 2013 ~14hr-35mins >> m1.large subject-2 01:06:06 UTC 2013 15:08:45 UTC 2013 ~14hr-02mins >> cc2.8xlarge subject-1 01:26:38 UTC 2013 12:30:23 UTC 2013 ~11hr-04mins >> cc2.8xlarge subject-2 01:27:28 UTC 2013 12:19:08 UTC 2013 ~10hr-52mins >> >> Although m1.large is a few hours slower, it seems to be the more cost >> effective option since it is $0.24 per hour (2 cores). If you have run >> Freesurfer on AWS, do you have a similar experience ? Any suggestions to >> speed up the run-times on AWS would be very helpful. >> >> Thanks >> Mehul >> >> >> >> > > The information in this e-mail is intended only for the person to whom it > is > addressed. If you believe this e-mail was sent to you in error and the > e-mail > contains patient information, please contact the Partners Compliance > HelpLine at > http://www.partners.org/**complianceline<http://www.partners.org/complianceline>. > If the e-mail was sent to you in error > but does not contain patient information, please contact the sender and > properly > dispose of the e-mail. >
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