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. The proper implementation is expected to be available in September?.

2008

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

space token	voms group to be associated	space to be reserved	namespace to be created
ATLASDATADISK	/atlas/Role=production	see below*	/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) see below*	/home/atlas/atlasmcdisk write permission only to atlas/Role=production
ATLASPRODDISK	/atlas/Role=production	2TB (see below*)	/home/atlas/atlasproddisk write permission only to atlas/Role=production
ATLASGROUPDISK	/atlas	6TB (see below*)	/home/atlas/atlasgroupdisk/phys-exotics write permission to atlas/Role=production, /atlas/phys-exotics/Role=production /home/atlas/atlasgroupdisk/phys-higgs write permission to atlas/Role=production, /atlas/phys-higgs/Role=production /home/atlas/atlasgroupdisk/phys-susy write permission to atlas/Role=production, /atlas/phys-susy/Role=production /home/atlas/atlasgroupdisk/phys-beauty write permission to atlas/Role=production, /atlas/phys-beauty/Role=production /home/atlas/atlasgroupdisk/phys-sm write permission to atlas/Role=production, /atlas/phys-sm/Role=production
ATLASUSERDISK	/atlas	5TB (see below*)	/atlas/user write permission to all ATLAS users
ATLASUSERDISK	/atlas/<locality>, <locality>=fr,ro,cn,jp,...	sites to decide	/atlas/<locality>/user write permission to local ATLAS users

ATLAS top directory

• below it is represented by /atlas. Each site should replace it according to their local structure.
  • eg. It is lapp-se01.in2p3.fr:/dpm/in2p3.fr/home/atlas for lapp.
• this top directory is recommended to be configured so that an ordinary user cannot create a file/directory directly underneath.
• the default ACL of this top directory is recommended to have write permission to /atlas/Role=production and /atlas/Role=lcgadmin.

ATLASDATADISK

• Estimation of size comes later
• group associated with the space token: /atlas/Role=production
• namespace to be created: /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)
• Namespace to be created and its ACL: /atlas/atlasproddisk, write permission only to /atlas/Role=production

# 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

ATLASGROUPDISK

• 6TB for a typical T2 with ~500 CPU’s and ~100 TB disk
• The size may decrease in case D1PD goes into ATLASMCDISK.
• namespaces to be created and their ACLs:
  • /atlas/atlasgroupdisk, write permission only to /atlas/Role=production
  • /atlas/atlasgroupdisk/phys-exotics, write permission to atlas/Role=production, /atlas/phys-exotics/Role=production
  • etc...

ATLASUSERDISK

• 5TB for a typical T2 with ~500 CPU’s and ~100 TB disk
• namespaces to be created and their ACLs: /atlas/user, write permission to all ATLAS users
• Usually, sites already have this namespace created by user analysis jobs so far.
• example commands
  • dpns-mkdir lcg-se01.icepp.jp:/dpm/icepp.jp/home/atlas/user
  • dpns-setacl -m g:atlas:rwx,m:rwx,d:g:atlas:r-x lcg-se01.icepp.jp:/dpm/icepp.jp/home/atlas/user
  • dpns-getacl /dpm/icepp.jp/home/atlas/user

# file: /dpm/icepp.jp/home/atlas/user # owner: root # group: atlas user::rwx group::rwx #effective:rwx group:atlas/Role=production:rwx #effective:rwx mask::rwx other::r-x default:user::rwx default:group::r-x default:group:atlas/Role=production:rwx default:mask::rwx default:other::r-x

ATLASLOCALGROUPDISK

• size to be decided by sites.
• the resources not included in the pledge.
• name space: /atlas/fr/user (or /atlas/ro/user, /atlas/cn/user, /atlas/jp/user, etc.)
• ACL: write permission only to /atlas/fr group (or /atlas/ro, /atlas/cn, /atlas/jp correspondingly)
• example ACL: