WLCG Tier1 Service Coordination Minutes - 5 April 2012

Attendance

Local: Massimo, Oliver, Alexandre, MariaG, Maarten, Stefan, AndreaS, Eva, IanF, MariaDZ, Ale, Stephane.

Remote: Burt, Jhen-Wei, IN2P3, RAL, Carlos (BNL), Andrew (Triumf), Andreas (KIT), Joel, Alexei.

Action list review

Release update

Data Management & Other Tier1 Service Issues

Other site news

• FNAL: testing EOS version 0.1.4-1 (they have deployed 0.1.2-2). Saw some of the load issues with FTS 2.2.8, but have not yet applied the patches.

CASTOR news

CERN operations and development

EOS news

xrootd news

• xroot v3.2.0 is available - see release notes

dCache news

StoRM news

FTS news

• FTS 2.2.8 EMI now running in production at: CERN on all the FTS servers (pilot, T2Export and T0Export), NDGF-T1, RAL-LCG2, Taiwan-LCG2, FZK-LCG2 (just yesterday, waiting confirmation everything is ok). Rollout to the T1s is ongoing.
• Summary of 2.2.8 rollout - https://svnweb.cern.ch/trac/glitefts/wiki/FTS228RolloutPlanning
  • Detailed FTS server deployment plan: https://docs.google.com/spreadsheet/ccc?key=0AthhzXLQok7XdFpUeDBfLXE2S1RDZE4zcHp6QWVpUFE .
  • Alessandro from CNAF requested to postpone their date for FTS upgrade towards the end of the required period 28-29.3. Ale confirmed that 4 hrs max. are enough.
  • CMS (Nicolo) said 3 GGUS tickets were opened with FTS 2.2.8 experience recently. The new functionality of 'resume' transfers requires a patch, now ready and being tested on the pilot system in order to use a less frequent check-point (now checking every second and overloading the system). The new EMI release in April will contain this patch.
• FTS 3 update by Oliver (slides on the agenda). Nxt demo on 21st March.

DPM news

• DPM 1.8.3, certification completed
  • Will be released for EMI-I on SL5
  • EPEL compatibility
  • synchronous GET for performance improvements
  • HTTP interface
  • Integration of gridPP admin toolkit
• First SL6 support expected with EMI-II (May 2012)
• DPM 1.8.2-3 (EMI release) in production
• DPM 1.8.2-3 (gLite release) in production
  • fast dpm-drain
  • filesystem selection algorithm configurable by admin
  • support for central banning (Argus)
  • Allow definition of the number of threads for DPM and SRM servers at startup time
  • https://savannah.cern.ch/patch/?5005
  • https://savannah.cern.ch/patch/?5006
• Periodic releases of new unstable components can be followed on the blog: https://svnweb.cern.ch/trac/lcgdm/blog
  • This covers NFSv4.1, WebDAV, Nagios, Catalogue synchronisation & 'perfsuite'.
  • Latest release: https://svnweb.cern.ch/trac/lcgdm/blog/unstable-release-1111

LFC news

• LFC 1.8.2-3 (EMI release) in production
• LFC 1.8.2-2 (gLite release) in production
  • fix for read-only replica operation (LHCb)
  • support for central banning (Argus)
  • https://savannah.cern.ch/patch/?5003
  • https://savannah.cern.ch/patch/?5004

LFC deployment

Site	Version	OS, n-bit	Backend	Upgrade plans
NDGF	1.7.4.7-1	Ubuntu 10.04 64-bit	MySQL	None
TRIUMF	1.7.3-1	SL5 64-bit	MySQL	None
BNL	1.8.0-1	SL5, 64-bit	Oracle	None
CERN	1.8.2-0	SLC5 64-bit	Oracle	all servers are SLC5 64-bit virtual machines
CNAF	1.8.0-1	SL5 64-bit	Oracle	24/4: upgrade to 1.8.2-2
KIT	1.7.4-7	SL5 64-bit	Oracle	Oracle backend migration pending
NL-T1	1.7.4-7	CentOS5 64-bit	Oracle
PIC	1.8.2-2	SL5 64-bit	Oracle
RAL	1.8.2-2	SL5 64-bit	Oracle	None
IN2P3	1.8.2-2	SL5 64-bit	Oracle 11g

Experiment issues

• Joel (LHCb) requests that deployment of new major versions of LFC is followed by this meeting, as there are still sites with very old versions.

WLCG Baseline Versions

• WLCG Baseline versions: table
• Recent updates:
  • CASTOR: bug fix release.
• WLCG Baseline versions: table
  • CernVM-FS: revised RPMs; fixed presentation bug in cvmfs_config chksetup. The default maximum number of open files has been increased from 32k to 64k.
  • StoRM: fixed some bugs in BE and FE; fixed bugs in YAIM related to publication of GLUE information.
  • VOBOX: complete overhaul of the proxy renewal facility that fixes several bugs and adds new features.

Status of open GGUS tickets

Review of recent / open SIRs and other open service issues

• 2012-03-20 GGUS unreachable from several sites: https://twiki.cern.ch/twiki/bin/view/LCG/VoUserSupport#SIRGGUSunreachable20120320

Conditions data access and related services

Database services

• Experiment reports:
  • ALICE: ntr
  • ATLAS: Increased the number of sessions for ATLAS LFC.
  • CMS: ntr
  • LHCb: ntr

• Site reports:

• From Carlos (BNL):
  • Via different functional tests between client and a test database server it was observed that the Session Data Unit (SDU) negotiation between client and database server could not be be grater 8*1024 SDU size in 11G (11.2.0.3) if the DEFAULT_SDU_SIZE parameter in the sqlnet.ora is set in the GRID_HOME as stated in different oracle documentation for this database release.
  • After following up this with Oracle Support SR(3-5430820151) and providing different tests scenarios, oracle support acknowledged that the information presented is not accurate and this parameter should be set via sqlnet.ora file in the database DB_HOME, oracle support based this advise on oracle's internal documentation.
  • After changing the location of the sqlnet.ora file as advised and doing some functional tests the negotiation between client database and server database for this SDU parameter it was observed values grater than 8*1024 up to 32*1024.

AOB

-- AndreaSciaba - 04-Apr-2012