-- JamieShiers - 28 Sep 2006

SC4 Combined Action List

Actions preparing for Q3/Q4 (CMS CSA06 etc.)

General actions

  • Site monitoring of local services - to be discussed in detail at September 15 SC Tech Day
  • Tools to monitor transfer activities on FTS channels; provide access to FTS logs (Gavin, Paolo) ( Temporary solution being tested )
  • Improve the performance and reliability of the gLite Resource Broker (critical path for CMS CSA06)
  • Support multiple priority levels for grid batch jobs (critical path for LHCB distributed analysis)

ATLAS Actions

Request Date Due Date Action Requestor Target Responsible Contact More Info Status

CMS Actions

Request Date Due Date Action Requestor Target Responsible Contact More Info Status
17 August   Transfer rates into CERN Michael Ernst James Casey, Olof Barring     See below In Progress

ALICE Actions

Request Date Due Date Action Requestor Target Responsible Contact More Info Status
27 June 10 July end points for T1-T2 Latchezar Betev ALICE T2s Patricia Mendez Patricia.Mendez@cernNOSPAMPLEASE.ch - Pending - focus first on Tier0 - Tier1 issues (7 August)

LHCb Actions

Request Date Due Date Action Requestor Target Responsible Contact More Info Status
27 June 30 June ROOT/POOL data access to SEs Umberto Marconi LHCb sites Nick Brook / Umberto Marconi Nick.Brook@cernNOSPAMPLEASE.ch, Umberto.Marconi@cernNOSPAMPLEASE.ch See below Problem only seen at SARA/NIKHEF & IN2P3
27 June 30 June ROOT/POOL data access to SEs Umberto Marconi NIKHEF/SARA Nick Brook / Umberto Marconi Nick.Brook@cernNOSPAMPLEASE.ch, Umberto.Marconi@cernNOSPAMPLEASE.ch - There is a specific network-related issue at NIKHEF/SARA which prevents jobs on worker nodes at NIKHEF accessing data on SEs at SARA. Following GDB of July 5th, proposed that this is followed up by negotiation between site, experiment and appropriate developers. July 19th. As temporary measure, NIKHEF is not used by LHCb for reconstruction, but only for simulation production. Discussions with dCache developers suggest a solution could be in beta shortly.
27 June July VO boxes Umberto Marconi CNAF Nick Brook / Umberto Marconi Nick.Brook@cernNOSPAMPLEASE.ch, Umberto.Marconi@cernNOSPAMPLEASE.ch Available at all sites except CNAF Pending but not a show-stopper Updated 3 July
27 June prior to October COOL and 3D database services Umberto Marconi all sites Nick Brook / Umberto Marconi Nick.Brook@cernNOSPAMPLEASE.ch, Umberto.Marconi@cernNOSPAMPLEASE.ch - July 24 Pending - more details of precise services by site to be provided

ROOT/POOL data access to SE problem

The problem is with the client library of dcache that checks only the first 56 CAs. If your are unlucky (your CA is beyond these first 56 CAs) any interaction with the dcache server is not authenticated and fails. This problem has been experienced at IN2P3 and NIKHEF. LHCb want to have assured everywhere the possibility of accessing data directly from SE (without copying them to local disk on the WN)

Update 3 July - a fix for this is scheduled for gLite 3.0.2

Update 19 July - As IN2P3 moved to gsidcap that is not supported by ROOT until recently, LHCb will use the disk endpoint there temporarily

Update 25 July - This is not supported by ROOT in the AA until next release. LHCb will need to re-build our applications. Although not advertised the Lyon disk SE does support insecure dcap. Our "hack" to use this failed - currently under investigation by LHCb

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Topic revision: r3 - 2007-02-14 - FlaviaDonno
 
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