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

• Unless mentioned, the size is for a typical T2 with ~500 CPU’s
• Site admin's are requested to create the space tokens, but namespace directories can be left to atlas production if the top directory is properly set up. (Of course they are welcome to create them by themselves).

space token	voms group to be associated	space to be reserved	namespace directory(-ies) 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: