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I wonder what it means to certify. Results are the same? Results are the same _and_ CPU performance is no worse? Results are the same, CPU performance is no worse and memory requirements are similar? Anyone know? -- Charles C. Young M.S. 43, Stanford Linear Accelerator Center P.O. Box 20450 Stanford, CA 94309 [log in to unmask] voice (650) 926 2669 fax (650) 926 2923 CERN GSM +41 76 487 2069 > -----Original Message----- > From: [log in to unmask] > [mailto:[log in to unmask]] On > Behalf Of Wei Yang > Sent: Thursday, April 12, 2007 6:01 PM > To: atlas-sccs-planning-l > Subject: Re: Notes of ATLAS SCCS meeting (April 11, 2007) > > I also get a e-mail from Frederick Luehring saying that 32bit > Athena and > SLC4 64bit are certified. So I think we are safe(?) to go > with RHEL4 64bit. > > Wei Yang | [log in to unmask] | 650-926-3338(O) > > > Gordon Watts wrote: > > Hi, > > > > At the software week before the one that just happened in Munich, > > there was a long report on performance issues on 64 bit machines. I > > suspect there was a recent update in Munich (I was not able > to attend). > > The results three months ago were quite bad - if you used a > normalized > > performance scale it looked like the 64 bit processors were more > > expensive for less power, actually (but not by much). And > the memory > > usage was as you report below. The general message seemed to be to > > stay away from 64 bit. > > > > You might look through the Munich agenda to see if there was an > > update (they had just setup a task force at the previous > workshop to > > address the 64 bit issue). I'm about half way through the > agenda -- if > > I find anything I'll let you know. David Quarrie is a good > person to > > contact about this issue as well. > > > > Cheers, > > Gordon. > > > > > >> -----Original Message----- > >> From: [log in to unmask] [mailto:owner- > >> [log in to unmask]] On Behalf Of Stephen J. > >> Gowdy > >> Sent: Wednesday, April 11, 2007 1:34 PM > >> To: Wei Yang > >> Cc: atlas-sccs-planning-l > >> Subject: Re: Notes of ATLAS SCCS meeting (April 11, 2007) > >> > >> We can run the 32-bit applications on the 64-bit OS. Although I get > > the > >> feeling most sites are using a 32-bit OS also. > >> > >> It is almost certain that 2GB is not enough for the 64-bit > > application. > >> The memory usage is doubled and the 30% gain in CPU is > therefore lost > >> (a few times) in memory cost. There is an effort kicking off to > > attempt > >> to > >> reduce the memory usage and try to understand why 64-bit > applications > >> is double (you expect some things to double, but not everything I > >> think). > >> Not > >> clear to me when the results from that will be available, certainly > > not > >> soon. > >> > >> On Wed, 11 Apr 2007, Wei Yang wrote: > >> > >>> [JohnB, Richard, Len, Wei, Randy, Booker] > >>> > >>> 1. DQ2 > >>> corrupted AOD data removed. This gave us a few days of trouble > >> free > >>> production until today. > >>> > >>> 2. Tier 2 hardware > >>> > >>> Storage arrived waiting for memfs machines to free power. Current > >> plan is to > >>> reinstall memfs machines and then move them to Building > 84. So Atlas > >> storage > >>> schedule depend on the schedule of memfs machines: > >>> > >>> a) 10Gb, 1Gb network cables ready from Build 50 to 84 > >>> b) JohnY reconnected console lines to all memfs machines > >>> c) Charlie is working on subnet and dhcp for the memfs > machines. To > >> be done > >>> today. > >>> d) Lance is working on kickstart configuration for memfs machines. > > To > >> be done > >>> today. > >>> e) Shirley will install OS, probably tomorrow. > >>> > >>> Randy or Wei will start a installation request in RT. > >>> > >>> Once Atlas storage is powered on, Lance will install > solaris 10 x86 > >> and ZFS > >>> on them. Wei will work on xrootd part. > >>> > >>> CPU nodes are also arriving/will arrive soon. Need to > decide OS (see > >> below) > >>> 3. Xrootd/srm > >>> > >>> No info. > >>> > >>> AOB > >>> > >>> Tier 2 web site: we will go with our own tech base and design. Wei > > e- > >> mailed > >>> Chip of TIS to go ahead with the plan. > >>> > >>> At today's F&O phone meeting, Wei asked what OS will ATLAS use. So > >> far, ATLAS > >>> uses SLC3/4 32bit. Working on 64 bit (Boston is using > SLC3 32 bit). > >> There are > >>> memory issues running (32bit or 64bit app) on 64 bit OS. Need > >> clarification > >>> about whether 2GB/core is enough for 64bit OS (with > memory problem). > >>> > >>> We can run SLC/RHEL 4 32bit. But the OS will be slow, and yet we > > have > >> to > >>> support another OS. > >>> > >>> > >>> > >>> Wei Yang | [log in to unmask] | 650-926-3338(O) > >>> > >>> 070321 Gordon Discuss perception of SLAC Tier-2 with external > > folk. > >>> 070404 no info > >>> 070411 no info > >>> > >>> 070321 Wei Send example new web page link to list > >>> 070404 done, no feedback > >>> 070411 Talked to T1/T2s. Will go with our own. E-mailed > >> Chip > >>> of TIS > >>> > >>> 061108 Richard Discuss with SLAC Security longterm approach to > > ATLAS > >> VO > >>> 061115 No information. > >>> 061213 Nothing happened yet. > >>> 070103 No information. > >>> 070110 Richard & BobC in Denver, Stephen will email them. > >>> 070124 Don't know the status. > >>> 070131 Don't believe this happened. > >>> 070207 Have not done this. Randy has talked to Heather, > >> didn't > >>> have any time to comment today but she is > aware about > >>> it. Will treat each VO as an enclave, if > you are using > >>> anonymous accounts need to be able to show how ran a > >> job > >>> and when. The main issue is that VOs are not legal > >>> entities and anyone can declare themselves > a VO. Would > >>> need to actually test that the required information > > can > >>> actually be found. > >>> 070221 No info. > >>> 070228 No info. > >>> 070314 No info. > >>> 070321 No info. > >>> 070404 No info > >>> 070411 no info > >>> > >> -- > >> /------------------------------------+-------------------------\ > >> |Stephen J. Gowdy, SLAC | CERN Office: 32-2-A22| > >> |http://www.slac.stanford.edu/~gowdy/ | CH-1211 Geneva 23 | > >> |http://calendar.yahoo.com/gowdy | Switzerland | > >> |EMail: [log in to unmask] | Tel: +41 22 767 5840 | > >> \------------------------------------+-------------------------/ >