SLAC Site Report Chuck Boeheim Assistant Director SLAC Computer Services

6/30/1999Chuck Boeheim/SCS2 Supported Systems w AIX 4 – <114 No new AIX systems being purchased Candidate for future phase out w Solaris Current recommended desktop system Solaris 7 needs AFS client; schedule deployment around BaBar run schedule w Linux RH >130 Using Transarc AFS 3.5

6/30/1999Chuck Boeheim/SCS3 AFS Entirely at AFS 3.5 AFS 3.5 server on Solaris 2.6 AFS 3.5 client on Solaris, AIX, Linux, NT Servers now largely stable Had long period of intensive work with Transarc Clients stable except E1000 Performance Generally improved by 3.5 Severe congestion on SMP servers

6/30/1999Chuck Boeheim/SCS4 AFS Utilization Curve

6/30/1999Chuck Boeheim/SCS5 BaBar Computing

6/30/1999Chuck Boeheim/SCS6 HPSS/OOFS w HPSS has been deployed as a tape management system for BaBar HPSS does NOT manage disk pools w OOFS developed to migrate/retrieve objectivity databases using HPSS w Issue about manpower needed to operate w Issue what to do about general staging needs

6/30/1999Chuck Boeheim/SCS7 Adventures With Autoclient w How to cheaply manage 320 system images? w Autoclient from Sun: System boots via net from server / mounted r/o from server /etc mounted r/w from server /usr/vice/cache, /tmp, swap local w Ratio of one server per 50 clients

6/30/1999Chuck Boeheim/SCS8 Autoclient Results w Systems did install on boot w Quick recoveries after outage w Uncertain if this makes upgrades easier w Single point of failure for 50 systems w Some odd behavior with cachefs w Evaluating approach now, working with Sun Product Manager