ATLAS Computing @ RZG

Status

Stefan Kluth, 05.12.05

Operation: hardware

Repeated disk failures in fileservers

more than 25% (Maxtor 7Y250M)

Suppliers investigated the problem

12 new disks on loan in mpp-fs4 (ATLAS)

2 disks died (firmware problem, not heat!)

12 Seagate 250 GB “24x7” disks ordered

put into fileserver to test different brand

Now have complete exchange of disks

MaxLine III 300 GB disks shipments received

Hardware: new file servers

Need to increase disk capacity

pledge 20 TB to WLCG for 2006

RZG Technology for now

SATA RAID (16 x 500 GB) with headnodes

cost 11,2 k€ / 8 TB today

schedule for middle 2006 (MAGIC buys now)

new 300 GB disks give some relief

out-of-service server comes back

ca. 20% capacity gain

LCG @ MPI/RZG

Basic installation ready

Thanks to Ariel, Alberto and Denis!

interface LCG ↔ SGE + afs

CHEP 2006 contribution accepted

Tests with MAGIC and ATLAS successful

jobs submitted by hand using “edg-job-submit”

Installed servers at RZG

For ATLAS do site qualification now

Munich ATLAS Tier-2/3

Collaboration of MPI/RZG/LMU/LRZ

build and operate one average ATLAS Tier-2

add 0.5 of Tier-2 as Tier-3 in same system

physically at RZG and LRZ in Garching

Logically one federation (Munich Tier-2)

MOU in preparation

plan to sign this year

MPI/ATLAS signs WLCG MOU

LMU/ATLAS needs BMBF for WLCG MOU

Local Procurement

Procurement through four accounts?

little planning

heterogeneous infrastructure

double (or no) purchases

Should go via ATLAS Computing

have a chance to plan and coordinate

save money medium term

less work for admins

Summary

Hard disk failures resolved

12 MaxLine III failures: no heat problem

full exchange of Maxtor disks

12 Seagate disks will confirm

LCG@RZG basic install ready

site qualification now

Planning for Munich Tier-2 centre

MOU MPI/RZG/LMU/LRZ prepared

2005-01-28T10:35:58