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1. File System Layout
2. Details
3. IBRIX Quota Tutorial
4. How to check your quota
5. Apply for more quota

1. File System Layout


The Diagram below shows the directory tree stucture of the Ibrix file system
mounted as /uscms and /uscms_data:


/uscms
├── METADATA
├── home
│   ├── user_1
│   │   ├── nobackup -> /uscms_data/d1/user_1
│   │   ├── private
│   │   └── work
│   ├── user_2
│   │   ├── nobackup -> /uscms_data/d1/user_2
│   │   ├── private
│   │   └── work
│    .
│    .
│   └── user_n
│       ├── nobackup -> /uscms_data/d1/user_n
│       ├── private
│       └── work
├── physics_grp
│   ├── grp_1
│   │   ├── code
│   │   ├── nobackup -> /uscms_data/d1/grp_1
│   │   └── work
│   ├── grp_2
│   │   ├── code
│   │   ├── nobackup -> /uscms_data/d1/grp_2
│   │   └── work 
│    .
│    .
│   └── grp_n
│       ├── code
│       ├── nobackup -> /uscms_data/d1/grp_n
│       └── work
├── prod
└── ups


/uscms_data
├── d1
│   ├── user_1
│   ├── user_2
│    .
│    .
│   ├── user_n
│   ├── grp_1

│   ├── grp_2
│    .
│    .
│   ├── grp_n
│   └── grid_home
├── d2
│    .
│    .


2. Details:

      /uscms file system contains user home, group and products areas.

      Initial 2GB quota hard limit on individual users uid in this file system. Soft limits set and working on daily scripts to notify users they have reached their soft limit.

      File system located on LSI fiber attached, highly redundant raid array.

      “nobackup” link in user home area and individual physics group areas points to non-backed up data file system(s) (see details below). Files and data that are re-creatable or that do not require backups should be stored in this area.

      Physics group project areas follow the same directory structure as  individual user areas. As of February 8 2005 we have the following physics and detector groups: cmsfnal, cmsjtmet, cmsmuon,  cmspxl,  cmstb04, lpceg, lpcmuon, lpcsimu, lpctrk

      Physics group quotas are based on group ID's (GID)  initially set 5GB.  We no longer use the shared physics group uid's for these areas.
      Disk managers are part of these new groups.

      Backup of this file system done with TIBS. This layout enables tibs to make one separate backup for each user area.

      METADATA, ups and prod areas are not write accessible by all users.

      /uscms_data contains one or more separate file systems named d1-dn.

      Contains a directory for each user and physics group.

      Individual user quotas are initially set to 5GB.

      Physics group gid quotas are initially set to what is used now on NFS mounted disk (~250GB)

      Any disk mounted under /uscms_data is by definition non-backed up storage

      /uscms_data/d1/grid_home includes the Open Science Grid VO group accounts that jobs run under. These group accounts have a 30GB quota limit in this file system. Eventually the shared data, application and tmp disk areas will also be included in the /uscms_data/d1 file system.

3. IBRIX Quota Tutorial

4. How to check your quota

All the uaf nodes have the following 2 commands configured to check your current user or group quota:

ibrix_uquota
gives (fs_ibrix01 corresponds to /uscms and fs_ibrix02 corresponds to /uscms_data/d1)

This rsh session is using DES encryption for all data transmissions.
Authenticated wenzel/cms/farm@FNAL.GOV
Account ibrix: authorization for wenzel/cms/farm@FNAL.GOV for execution of
               /usr/krb5/k5arc/scripts/my_quota successful
Changing uid to ibrix (1343)
Name             : wenzel
 UID              : 1915
 FileSystem       : fs_ibrix01
 Megabytes used   : 14
 Megabytes soft   : 2000
 Megabytes hard   : 2048
 Megabytes grace  : none
 Files     used   : 278
 Files     soft   : 0
 Files     hard   : 0
 Files     grace  : none
 FileSystem       : fs_ibrix02
 Megabytes used   : 34116
 Megabytes soft   : 81000
 Megabytes hard   : 81920
 Megabytes grace  : none
 Files     used   : 6912
 Files     soft   : 0
 Files     hard   : 0
 Files     grace  : none

ibrix_gquota <group>

e.g. ibrix_gquota lpctrk

results in:

This rsh session is using DES encryption for all data transmissions.
Authenticated wenzel/cms/farm@FNAL.GOV
Account ibrix: authorization for wenzel/cms/farm@FNAL.GOV for execution of
               /usr/krb5/k5arc/scripts/group_quota successful
Changing uid to ibrix (1343)
Name             : lpctrk
 UID              : 9636
 FileSystem       : fs_ibrix01
 Megabytes used   : 1
 Megabytes soft   : 5000
 Megabytes hard   : 5120
 Megabytes grace  : none
 Files     used   : 4
 Files     soft   : 0
 Files     hard   : 0
 Files     grace  : none
 FileSystem       : fs_ibrix02
 Megabytes used   : 1
 Megabytes soft   : 255000
 Megabytes hard   : 256000
 Megabytes grace  : none
 Files     used   : 1
 Files     soft   : 0
 Files     hard   : 0
 Files     grace  : none



 
 
 

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Last modified: June 14, 2005