Atlas:StorageRequirements

Introduction

• Information only for T2s.
• Information only for DPM for the moment.
• There is still an uncertainty with ATLASGROUPDISK
• Atlas official requirements in http://indico.cern.ch/materialDisplay.py?contribId=1&materialId=slides&confId=37181

but contents are not final yet.

• There is a technical limitation in DPM. Atlas has contacted DPM developpers to know when proper implementation is available.

2008

The size is for a typical T2 with ~500 CPU’s

space token	group associated	space to be reserved	namespace to be created
ATLASDATADISK	/atlas/Role=production	*	/home/atlas/atlasdatadisk # group: atlas/Role=production user::rwx group::rwx #effective:rwx group:atlas/Role=production:rwx #effective:rwx mask::rwx other::r-x default:user::rwx default:group::rwx default:group:atlas/Role=production:rwx default:mask::rwx default:other::r-x
ATLASMCDISK	/atlas/Role=production	15TB (60TB for 100% AOD)*	/home/atlas/atlasmcdisk writable only to atlas/Role=production
ATLASPRODDISK	/atlas/Role=production	2TB*	/home/atlas/atlasproddisk writable only to atlas/Role=production

ATLASDATADISK

• Estimation of size comes later
• group associated with the space token: /atlas/Role=production
• namespace to be created: /home/atlas/atlasdatadisk
• namespace acl:

# group: atlas/Role=production
user::rwx
group::rwx              #effective:rwx
group:atlas/Role=production:rwx         #effective:rwx
mask::rwx
other::r-x
default:user::rwx
default:group::rwx
default:group:atlas/Role=production:rwx
default:mask::rwx
default:other::r-x

ATLASMCDISK

• 15TB for a typical T2 with ~500 CPU’s and ~100 TB disk
• 60TB for a T2 requesting for 100% AOD.
• The size may increase in case D1PD comes in this space.
• Namespace ACL:

# group: atlas/Role=production user::rwx group::rwx #effective:r-x group:atlas/Role=production:rwx #effective:rwx mask::rwx other::r-x default:user::rwx default:group::rwx default:group:atlas/Role=production:rwx default:mask::rwx default:other::r-x

ATLASPRODDISK

• 2TB for a typical T2 with ~500 CPU’s (the size is to be re-visited)

ATLASGROUPDISK

• 6TB for a typical T2 with ~500 CPU’s and ~100 TB disk
• The size may decrease in case D1PD goes into ATLASMCDISK.

ATLASUSERDISK

• 5TB for a typical T2 with ~500 CPU’s and ~100 TB disk

 # file: lcg-se01.icepp.jp:/dpm/icepp.jp/home/atlas/atlasuserdisk
 # owner: /DC=ch/DC=cern/OU=Organic Units/OU=Users/CN=ueda/CN=482702/CN=I Ueda
 # group: atlas/Role=production
 user::rwx
 group::rwx              #effective:rwx
 group:atlas:rwx         #effective:rwx
 group:atlas/Role=lcgadmin:rwx           #effective:rwx
 group:atlas/Role=production:rwx         #effective:rwx
 mask::rwx
 other::r-x
 default:user::rwx
 default:group::rwx
 default:group:atlas/Role=lcgadmin:rwx
 default:group:atlas/Role=production:rwx
 default:mask::rwx
 default:other::r-x