CMS-ARDA Workshop 15/09/2003

CMS/LCG-0 architecture

Many authors…

15/09/2003CMS-ARDA Workshop 2P.Capiluppi

CMS/LCG-N testbed• CMS/LCG-0 is a CMS-wide testbed based on the LCG pilot

distribution (LCG-0), owned by CMS– Red Hat 7.3 (7.3.2 with CERN kernel recommended)– Components from VDT 1.1.6 and EDG 1.4.X (LCG pilot)– Components from DataTAG (GLUE schemas and info providers)– Virtual Organization Management: VOMS – RLS in place of the replica catalogue (uses rlscms by CERN/IT!)– Monitoring: GridICE by DataTAG– R-GMA (as BOSS transport layer for specific tests)

• Dynamic: install+test new components useful to CMS• Support (outside CMS)

– DataTAG WP4– LCG Experiment Integration and Support (EIS) team

• Currently configured as a CMS RC and producing data for PCP

It allows us to do our software integration while LCG-1 is not out!!!

15/09/2003CMS-ARDA Workshop 3P.Capiluppi

CMS/LCG-0 sitesSite Installed Monitored PCP-ready UI

CERN PCP/data

CNAF CMKIN only PCP/sub

Bari PCP/sub

Bologna CNAF UI

Bristol

Brunel Tools devel

Imperial College Tools devel

Islamabad-NCP

E.Polytechnique PCP/sub

Milano (EDT)

Legnaro Padova PCP/sub

NCU/Taiwan

US Iowa SE only ~170 CPU’s

15/09/2003CMS-ARDA Workshop 4P.Capiluppi

MCRunjob+ImpalaLiteor CMSProd

CMS/LCG-0 as a CMS Regional Center

Site Manager startsan assignment

RefDBPhys.Group asks foran official dataset

User starts aprivate production

Production Managerdefines assignments

DAG

job job

job

job

JDL

shellscripts

DAGMan(MOP)

LocalBatch Manager

LCGScheduler

Computer farm

CMSLCG-0

User’s Site (or grid UI) Resources

ChimeraVDL

Virtual DataCatalogue

Planner

USCMStestbed

15/09/2003CMS-ARDA Workshop 5P.Capiluppi

SECE

CMS software

CMS/LCG-0 PCP setup

BOSSDB

WorkloadManagement

System

JDL

RefDB

parameters

data registration

Job output filteringRuntime monitoring

input

dat a

lo

cat i

on

Push data or info

Pull info

UICMSProd/

MCRunbjob+BOSS

cmsrls

CE

CMS software

CE

CMS software

CE

WN

SECE

CMS software

SE

SE

SE

UI

BOSSDB

SE

SE

SE

CERNSE

cmsrls

Data replication

LFN

Job management

15/09/2003CMS-ARDA Workshop 6P.Capiluppi

Outcomes• 4 UI’s testing different production tools

– McRunjob/ImpalaLite (Bari, Bologna)• complex! But consistent with “official” environment

– CMSProd (Padova, Ecole Poly.)• simple!

• Testbed is quite stable– 500 Kevts “heavy” CMKIN (8h/job(250 evts); ~20 GB)– 500 Kevts CMSIM in production (350 Kevts/week; ~320 GB)

• Operates as a CMS Regional Centers– need to interact with existing environment, e.g.:

• not grid-aware comm. to/from RefDB: e-mail• not grid-aware data transfer tools: SRB bridge at CERN

– much more consistent architecture if we had only grid components!

• Only production services (no user analysis)