ADC Operation NL

Introduction

This page is summarizing the current setup/configuration of the NL cloud of the ATLAS Distributed Computing (ADC).

Apart from that, it also logs the used-to-happen issues during the day-to-day operation works.

Sites

combined Tier1 center:

Country	Institute	GOC site name
Netherlands	NIKHEF	NIKHEF-ELPROD
Netherlands	SARA	SARA-MATRIX

Tier2 centers:

Country	Institute	GOC site name
Russia	ITEP	ITEP
Russia	IHEP	RU-PROTVINO-IHEP
Russia	JINR	JINR-LCG2
Russia	PNPI	RU-PNPI
Russia	SINP	SINP
Russia	RRC-KI	RRC-KI
Ireland	CST	CSTCDIE
Turkey	ULAKBIM	TR-10-ULAKBIM

Data Management Services

• Storage Resource Manager v2.2: deployed on each site as common interface to storage elements
• gLite File Transfer Service (FTS): deployed at SARA serving the T1-T1 and T1-T2 data transfers to the sites of the NL cloud
• LCG File Catalog Service (LFC): deployed at SARA for cataloging grid files stored on the sites of the NL cloud

Data locations among SARA and NIKHEF

Daily operation logs

Date	Actions	Remarks
9 Oct. 2008	requests cosmic and 1beam reprocessed ESD to NIKHEF-ELPROD_DATADISK	needed by NIKHEF physics group
10 Oct. 2008	NL Tier2s become on-line again for MC production	FTS performance issue at SARA fixed

Useful links

• ADC eLog entries concerning NL cloud
• DDM operation wiki
• DDM browser
• SRM space usage monitor
• Data transfer dashboard (T0-T1, T1-T1)
• Data transfer dashboard (T1-T2)
• PanDA monitor

Trouble shooting logs

Sept. 2008 - huge transfer backlog from T2s to SARA

Problem fixed by running the FTS admin tool to slim down the FTS job history db table.

=== Sept. 2008 - SRM request timeout reading data from SARA A cron job fixing orphan file issue of dCache loads PNFS server so it was stopped. Also observe a broken network switch involving 4 new dCache node. The problematic network switch has been replaced. A broken dCache node is also replaced.