---------------------------------------------------------------------- H H PPP CCC UK NATIONAL HPC SERVICE H H P P C C -------------------------- HHHHH PPP C x x provided by H H P C C xx EPCC and H H P CCC x x CCLRC Daresbury Laboratory ---------------------------------------------------------------------- HPCx User Mailing 046 28 May 2004 ---------------------------------------------------------------------- Contents ** Service reopens on Phase 2 ** Phase 2 LL Configuration ** Early-use data ** Gromacs ---------------------------------------------------------------------- Greetings-- SERVICE REOPENS ON PHASE 2 HPCx will shortly reopen with 50 frames, that is 1600 processors. The acceptance test exercise is now complete, apart from the "stability trial", which will run from now over the next ten days. During this time we will be running a normal user service, so users should not be affected. For interest, the complete new platform gave a value of 6,118 Gflops for the Rmax value of the Linpack benchmark. The service can thus provide 6,118 AUs per hour, 146,832 AUs per day. ** The new platform gave 6,188 Gflops for the RMax value of Linpack, not 6,118 as I said before; that was a dictation error. Apologies. Phase 2 will thus provide 6,188 AUs per hour, or 148,512 AUs per day. The "official" list of HPC systems in the world is the Top500 List: http://www.top500.org A new edition comes out in June, and unfortunately we just missed the deadline for this. However, we think that it will show that the HPCx Phase 2 platform is currently the most powerful computing system in Europe. ** The figures for HPCx Phase 2 will after all appear in the next edition of the Top500 list. ---------------------------------------------------------------------- PHASE 2 LL CONFIGURATION This is the current configuration of the service. Changes may be made later as required. Production region: 40 frames, 1280 processors. ------------------ Jobs using >64 processors Maximum job length: 12 hours The production region will now support jobs which use 1280 processors. Development region: 9 frames, 288 processors ------------------- Jobs using <=64 processors Maximum job length: 6 hours During the day (09:00-18:00), 5 of the development frames will run 1-hour jobs only, with the other 4 being able to run the longer jobs as well. On Phase 1, only 1 hour jobs could run during the day. We hope this change will provide greater flexibility for users and increase the throughput of development jobs. Parallel/interactive: 1 frames, 32 processors. --------------------- Serial jobs: Will run on one of the support frames. 20 ------------ processors are available One of the development frames will be reserved for use of the "Using the HPCx Service" course next Friday, June 4. ---------------------------------------------------------------------- EARLY-USE DATA The filestore which was used during the early-use exercise was moved to /hpcx/tmpchkpt when Phase 1 was closed. At the time (Mailing 41, 28 April) I said this would be removed on 27 May. As it's 28 May today, please note that this directory tree is now due for removal. If you have anything you need there, you should copy it away immediately. ---------------------------------------------------------------------- GROMACS The newest Gromacs version 3.2.1 has been installed on the system. Users of the older Gromacs version 3.1.4 can access this here: /usr/local/packages/gromacs/g_3.2.1 New users to Gromacs should contact the helpdesk to arange access. ---------------------------------------------------------------------- Regards --John ---------------------------------------------------------------------- Earlier mailings: http://www.hpcx.ac.uk/support/notices/index.html To be removed from the mailing list: log into your website account, go to the "Update" page, and click the "Opt out of user emails" field; then click "Commit update". -- John Fisher j.fisher@epcc.ed.ac.uk HPCx User Administration and Helpdesk HPCx: http://www.hpcx.ac.uk Helpdesk: support@hpcx.ac.uk Phone: +44 131 650 5029 Fax: +44 131 650 6555