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SLAC Computing Services Report: New Initiatives and System Updates

Get the latest updates on SLAC Computing Services, including new system purchases, Linux and Solaris updates, AFS support, Kerberos 5 switch, RT implementation, LSF platform usage, upcoming projects, Windows storage and backup strategies, and ongoing Windows system projects.

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SLAC Computing Services Report: New Initiatives and System Updates

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  1. SLAC Site Report Len Moss SLAC Computing Services Stanford Linear Accelerator Center

  2. Experiment Status • BaBar • New run startup delayed due to serious electrical accident in the Linac. • Ramping down Objectivity for data in favor of new xrootd format • Glast • Starting telescope assembly and cosmic ray testing in December • Planning 75 node cluster with 25 nodes and 25 TB of disk in 2005 Len Moss

  3. Storage Expansion Len Moss

  4. Processor Updates • Purchased ~300 Sun Fire 20Z systems, due this week • Dual 2.2 GHz Opterons, 2GB memory, 1 MB L2 cache • 36 GB SCSI drive, extra drive slot available • Power management via separate LAN and service processor • 256 systems for batch farm, replacing 256 Sun Netra T1s • Remainder for miscellaneous servers • Will run 32-bit RHEL 3 kernel • Replaced all power supplies on our Rackable Xeon systems • 384 systems taken off-site by vendor over long weekend power outage Len Moss

  5. Linux Status • Red Hat Enterprise 3 (RHEL3) rolled out to nearly all servers and about 75% of desktops • Trying to upgrade all remaining pre-RHEL3 systems, but… • BaBar needs RH 7.2 build capacity for some time • Lack of support from Fedora Legacy is serious concern • Will try to restrict RH 7.2 to a few servers Len Moss

  6. Linux Status, cont’d. • Weekly Red Hat phone meetings very useful • Have opened about 50 issues, currently about 16 active • Updates • Cron job to pull all updates from Red Hat Network • Use yum to update onsite systems • Provide RHN entitlements to update mobile and offsite systems • Starting to look at Scientific Linux, so far only for a few build and interactive servers Len Moss

  7. Solaris Status • Solaris • Solaris 9 on most Sun systems • 5 remaining Solaris 7 systems • Starting to downsize our Solaris batch farm • Will look at Solaris 10 soon Len Moss

  8. AFS Issues • Support • Agreement with Sine Nomine for AFS support on Linux and Solaris • Windows client support also available • Contributed support to Jeff Altman for work on Windows client • Future projects may include AFS device driver • Encryption • Recently turned on encryption for all clients except batch workers Len Moss

  9. Kerberos 5 • Recently switched to Heimdal Kerberos 5 KDCs on AFS DB servers • Fully K4 and AFS (kaserver) compatible • No problems at cutover – users never noticed • Clients still mostly AFS (klog, et al.) but… • Gradually rolling out PAM module • Most admin Perl scripts using Heimdal::Kadm5 • SLAC’s K5 realm info in DNS Len Moss

  10. Request Tracker (RT) • Replaced pure-email system with RT3 • Open source, support available from Best Practical • Web interface for admins, users still use email (for now) • MySQL backend, DB growing at ~0.5 MB/day • Average of ~25 new tickets per weekday • Interface and work flow can be extensively customized Len Moss

  11. Platform LSF • Now using LSF to manage a 64-node MPI cluster • Investigating LSF to manage Windows and Mac OSX clusters • Platform now has world-wide HEP terms available • Unit buy-in cost depends on total HEP licenses • Annual support depends on cluster size, but is tiered and capped Len Moss

  12. New Projects • KIPAC • Mac OSX cluster • 10 workers, managed by LSF, and 4 servers (see Chuck’s talk later this week) • Plan to buy a large SMP • Probably SGI Altix (Itanium, Suse Linux) • Research project: Huge Memory Machine • Pilot phase: 64-node AMD Opteron cluster with 0.5 to 1.0 TB of memory (see Chuck’s talk later this week) Len Moss

  13. Windows Storage • Windows storage at 8 TB and doubling every year (faster than Moore’s Law) • Quota’s implemented using Veritas StorageCentral • User space allocated in 500 MB chunks up to 2 GB • Initial group space set to 10 GB or 10% above current use • Group space will grow equally over time • Groups with larger needs can purchase additional space in TB chunks • Veritas CommandCentral procured to manage storage: • EMC CX600, Hitachi 9980, Sun 6120, EMC AX100, Emulex 9002 and 9802 HBAs • Brocade 3800 and 3900 switches Len Moss

  14. Windows Backup • Snapshot LUNs, Exchange 2003 and MS SQL storage to EMC AX100 SATA disk usingVeritas Storage Foundation and Flashsnap and MS VSS • Veritas NetBackup then archives to STK L180 LTO library • Expect to be able to recover by mounting a snapshot volume on the EMC AX100s, full recovery within 4 hours • Should be online by Q1 2005 Len Moss

  15. Other Windows Projects • Migrated AD from Windows 2000 to Windows 2003 • Using Thursby’s ADmitMac • Windows Dfs access for Mac OSX users • Uses Windows Kerberos authentication • Plan to implement SpySweeper EE anti-spyware for Windows desktops Len Moss

  16. Other Windows Projects, cont’d. • Investigating Windows XP SP2: • Currently blocked via GPO • Will probably treat more like a new OS rather than a Service Pack • Investigating Firewall Authenticated Bypass to manage systems that have the firewall applied • Windows questions? • Send mail to Brian Scott, btscott@slac.stanford.edu Len Moss

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