[Neglected to ask Richard about hsi action item, perhaps he could follow up with the status? I think I missed at least one name of those at SLAC too] ATLAS SCCS Planning 17Jan2007 ----------------------------- 9am, SCCS Conf Rm A, to call in +1 510 665 5437, press 1, 3935# Present: Stephen, Booker, Charlie, Chuck, Gordon, Wei, Richard Agenda: 1. DQ2 Status/Web Proxy Running fine but BNL had problems. They cannot get the data out of Tier-2s. The current rate is very low and data is accumulating. Will run out of space soon. Alexei wants to do a test of replicating data to SLAC. Not sure which space we have for the 10% (which would be about 400GB). Things that we produce data at 200GB/day. Could we provide the space for the test by stopping production if that is needed? Could also remove the 700GB of data is that we could move that elsewhere. Have quite a lot of space on one of the work. 2. Tier-2 Hardware One of the next things on the list to get ordered. Also need to find power for it. Evidence from the last week is that we are fairly certain we can find power but not sure exactly where it will be till it arrives. Did have the experience of a breaker blowing due to a mistake of not taking account of dual power supplies failing over from one site to the other. Looks like the logic of where we connect things has not been shown to be wrong but it is close to the limit. Work is going on to install more power. Actively working on unplugging and unracking the oldest servers to save space and power. Will probably turn off the shire machines. Next are the toris and nomas, would still run them if had the power and cooling. Also still looking for external solutions, like Sun's Black Box (200kW of stuff in standard racks in a shipping container). Also looking at water cooled racks. It has 2 inch water pipes and normal voltage. THere will be 6509 Cisco switch in the container with a 10G connect in. Racks are front-to-back. The heat exchangers are right up to the top of the racks so safety is a bit worried. The cost isn't very different than installations in building 50. Would only put CPUs there not storage. It is not space designed for people. Will need to write a plan for access to it. Sun are making four for their Beta program and we can only have one. Have also officially accepted the low-bid for water cooled racks in the computing building but not sure how long it will take to get them in. The Sun Black Boxes should start to become available in July. This would be a drain on Substation 7 which has 3MW spare. What is more critical is that it would be a drain on the chilled water. We cannot tap into the pipes as they go into the building (next to where the container would be) but after the water has gone up to the fourth floor and come back down to the first floor where existing access is there (which was there for adding auxiliary chilled water, not getting it out). A lot of worry about the thin water pipes underground. Should talk about options for if the pipes fail (rent a chiller or use fires hoses?). Need to renew quotes as they existing ones are quite old. Might align more with the Kavli purchase which could save some money. Two weeks delivery is what is quoted just now. Not sure if this can be sole source or not. 3. HPSS/gsiftp/xrootd Agreed that gsiftp is the easier way to go. So should try to get that working to see if we really need to go to a full SRM solution. With this solution we can put all the xrootd servers behind the firewall. Would introduce a single point of failure though. We need to transfer 1TB/day and a machine should be able to handle that. Machines 18,19,20 have been used to setup a test xrootd cluster. Need to write some code to get the gsiftp module working. Expect it will be weeks before we can test this. Booker is working on this with Andy's help. May have a better idea of how much work is involved. 4. AOB - Networking Meetings Not sure we would have heard about them if Charlie hadn't forwarded the mail. - wLCG Meeting at CERN Next Week http://indico.cern.ch/conferenceDisplay.py?confId=3738 Action Items: ------------- 070117 Stephen Email Wei archived dataset at SLAC for moving 061213 Booker Talk to AndyH (and others) about moving SRM interface forward 070103 Can plug in a gsiftp module for HPSS 6.2, DPM and dCache. Wei told AndyH but sure if it is useful. We are running HPSS 5.1 though. 070110 Will have a meeting tomorrow afternoon 070117 Done. 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.