AGLT2 Site Policies

Authentication and Authorization

Use of this Open Science Grid (OSG) site is subject to acceptance of the OSG User Acceptable Use Policy (AUP).

Access to AGLT2 resources is provided via GUMS/VOMS ("full-privilege") software and is restricted to OSG member VOs. Users are mapped to VO group accounts exclusively (may be more that one VO group account per VO: e.g., atlas has usatlas1, usatlas2, usatlas3 and usatlas4). No individual accounts are permitted.

Scheduling/Resource Allocation

AGLT2 consists of a mix of Opteron 285 processors and Intel Clovertown X5355 processors shared among OSG VO group accounts, with priority given to USATLAS and affiliated users. There are 236 job slots on the UM site currently. The Condor (V6.8.5) scheduler configuration allows 196 processors to be used simultaneously by the usatlas1 (Tier-2) accounts with opportunistic access to 40 more. As-available processors to be used by non-USATLAS OSG VO accounts may total up to 16 total jobs out of this total allocation.

Storage

Storage on AGLT2 is divided as follows:

$OSG_APP: Accessible on an 11TB NFS-exported volume, accessible on all cluster nodes
$OSG_DATA: Accessible on an 11TB NFS-exported volume, accessible on all cluster nodes
$OSG_WN_TMP: This is /tmp (~80GB) local filesystem on each compute node.

None of this storage is backed up. There are two jobs which run in cron to help clean up .gass_cache and $GLOBUS_LOCATION/tmp areas. The job submitters and data owners should backup any required data offsite and clean up any old files.