Open AFS on Computer

1
Open AFS on Computer Media Service (CMS)

• Daniela-Maria Pusinelli

AFS Cell at CMS - 1 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
2
Installation of AFS Cell

• successfull installation of test cell
  rz.hu-berlin.de from 2005 until 2006
• in November of 2006 production cell
  cms.hu-berlin.de was established
• 3 Kerberos (Heimdal) and Datenbank server
• 3 File server are configured
• all servers are running under Debian Etch
• all volumes are on SAN storage disks of 500 gb
• actually there are about 60 gb used

AFS Cell at CMS - 2 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
3
Users of Cell cms.hu-berlin.de /1

• there is an optional offer for all users with an
  CMS account for a separat user volume in AFS Cell
• everytime a new user of CMS gets an UNIX account
  he will get an AFS account and volume too
• UNIX ID is equal to ID in protection data base
• an adum script will transfer the passwd from UNIX
  account to AFS account
• authentification of users is managed by kerberos
• AFS-Token via klog or via integrated PAM Login

AFS Cell at CMS - 3 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
4
Users of Cell cms.hu-berlin.de /2

• actually there are 27,221 users at CMS (nearly
  every student and staff member)
• everybody gets at first a volume of 500 mb quota,
  which will be extended if she/he is using it
• in the average there are 42 user a day

AFS Cell at CMS - 4 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
5
Data Backup

• every volume has RO copies on other File servers
• every day at 6.00 pm all volumes will be released
• the volume release takes between 30 and 60
  minutes
• hierarchical backup policy on seperate SAN
  Storage via AFS backup
• it realizes that we can restore all data with
  state from the day before

AFS Cell at CMS - 5 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
6
Data Backup

• backups will be written to directories linked to
  virtual tapes
• every half year backup of level 0 (summer
  winter)
• every 1. of month backup from month before will
  be overwritten
• every week backup of last week will be
  overwritten
• every day corresponding day of last week will be
  overwritten

AFS Cell at CMS - 6 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
7
Support of CMS

• Support for nearly every clients
• Debian, Ubuntu, RedHat, SuSe, Windows, Mac OS
• Support for individual installation in working
  groups

AFS Cell at CMS - 7 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
8
Software distribution via AFS Cell

• third party software is stored in the AFS Cell
• For example Matlab, Maple, Intel Compiler,
  Portland Group Compiler
• the responsible person from institut or working
  group is a member of a AFS group
• ISO Images are stored and may be mounted from AFS
  for installation of software

AFS Cell at CMS - 8 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli
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Summary

• ToDo
• Backup into Tivoli Storage System (via HSM)
• Split user space into different directories (
  ls )
• improve performance for data access
• analysis of NFS V4 versus AFS
• http//www.cms.hu-berlin.de/dl/systemservice/fil
  eservice/afs

AFS Cell at CMS - 9 AFS-Workshop TU Graz
2008 Daniela-Maria Pusinelli