1 / 14

HEP Computing Status

This computing cluster at Sheffield University consists of interactive and batch clusters, equipped with self-built Linux boxes, AMD Athlon XP CPUs, and ample RAM. The cluster is used for various scientific research projects, making use of software such as Geant4, ROOT, and Atlas 10.0.1.

erush
Télécharger la présentation

HEP Computing Status

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HEP Computing Status Sheffield University Matt Robinson Paul Hodgson Andrew Beresford

  2. Interactive Cluster • 30 self built linux boxes • AMD Athlon XP cpu’s, 256/512 meg ram • OS Scientific Linux 303 • 100 megabit network • Use NIS for authentication, NFS mount /home etc • System install using kickstart + post install scripts • Separate backup machine • 15 Laptops mostly dual boot • Some MAC’s and one Windows Box • 3 Disk servers mounted as /data1 /data2 etc (few TB)

  3. Batch Cluster • 100 cpu farm Athlon XP 2400/2800 • OS Scientific Linux 303 • NFS mounted /home and /data • OpenPBS batch system for job submission • Gigabit Backbone with 100 MBit to worker nodes • Disk server provides 1.3 TB as /data Raid5 • Entire cluster assembled in house from OEM components for less than 50k • Hard part was finding air-conditioned room with sufficient power

  4. Cluster Usage

  5. Software • PAW, CERNLIB etc • Geant4 • ROOT • Atlas 10.0.1 • FLUKA • ANSYS, LS-DYNA

  6. Comments - Issues • Have tightened up security in last year • Strict firewall policy, limited machine exemption • Blocking scripts prevent ssh access after 3 authentication failures within 1 hour • Cheap disks allow construction of large disk arrays • Very happy with SL3 for desktop machines • Use FC3 for Laptops – 2.6 kernel

  7. The Sheffield LCG Cluster

  8. Division of Hardware 162 x AMD Opteron 250 (2.4 GHz) 4 GB RAM/box (2 GB/CPU) 72 GB U320 10K RPM local SCSI disk Currently running 32 bit SL303 for maximum compatibility with grid. ~2.5 TB storage for experiments. Middleware: 2.4.0 Probably the most purple cluster in the grid.

  9. Looking Sinister

  10. Status

  11. Usage so far • We can take quite a bit more.

  12. Monitoring • Ganglia with modified webfrontend to present queue information

  13. Installation • Service nodes connected to VPN and Internet • PXE Installation via VPN allows complete control of dhcpd and named • RedHat kickstart + post install script • ssh servers not exposed • RGMA always the hardest part • Stumbled across routing rules. • WN install takes about 30 minutes, can do up to 40 simultaneously.

  14. Matt Robinson: Future plans • Keep up with middleware updates • Increase available storage as required in ~3-4 TB steps • Fix things that break • Try not to mess anything up by screwing around • Look toward operating with 64 bit OS.

More Related