SiteReport

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• Site-Report
• Universität zu Köln

Dr. Stephan Wonczak Abteilung Systeme Zentrum für
Angewandte Informatik der Universität zu Köln
(ZAIK/RRZK)
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Contents

• Status of cell rrz.uni-koeln.de
• Servers
• Backup
• Apache and AFS
• Plans and activities

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AFS-Cell rrz.uni-koeln.de

• about 71600 Volumes
• about 56300 user-volumes
• about 12000 volumes (17 TB) picture
  archives(arachne-picture database, CEEC, )
• about 45000 AFS user entries
• about 1000 Clients

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AFS-cell rrz.uni-koeln.de

• 4 DB-servers
• afsdb1(openAFS 1.2.13, RHEL 3)
• lyra (openAFS 1.2.13, RHEL 3)
• agrippina (openAFS 1.2.13, RHEL 3)
• afs.thp (openAFS 1.2.13, RHEL 3)

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AFS-cell rrz.uni-koeln.de

• 9 file servers
• afsfs1 (openAFS 1.2.13, RHEL3)
• 8 x 512 GB (aa - ah)
• 4 x 128 GB (ba - bd)
• 2 x 256 GB (be, bf)
• afsfs2 (openAFS 1.2.13, RHEL3)
• 10 x 512 GB (aa ah)

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AFS-cell rrz.uni-koeln.de

• 9 file servers (continued)
• afsfs4 (openAFS 1.2.13, RHEL3)
• 2 GB (a), (unused)
• 2 x 512 GB (aa ab)
• afsfs5 (openAFS 1.4.4, RHEL3)
• 2 x 512 GB (aa ab)
• 8 x 128 GB (da - dg)

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AFS-cell rrz.uni-koeln.de

• 9 file servers (continued)
• arachnefs1 (openAFS 1.4.4, RHEL3)
• 12 x 512 GB (aa al)
• arachnefs2 (openAFS 1.4.7, RHEL5)
• 12 x 512 GB (aa al)

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AFS-cell rrz.uni-koeln.de

• 9 file servers (Fortsetzung)
• afs.thp (openAFS 1.2.13, RHEL3)
• 50 GB (a)
• agrippina (openAFS 1.2.13, RHEL3)
• 8 GB (a)
• lyra (openAFS 1.2.13, RHEL3)
• 4 GB (aa)

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AFS-cell rrz.uni-koeln.de

• Naming convention for vice-partitions
• a - z Discs w/o RAID or internal drives
• aa - az 250 GB/7K SATA SAN (RAID5)
• ba - bz 146 GB/10K FC SAN (RAID5)
• ca - cz 73 GB/15K FC SAN (RAID5)
• da - dz 146 GB/10K FC SAN (RAID51)
• These partitions are for our crown jewels. Disk
  space (RAID5) is mapped from two separate
  SAN-controllers, which is additionally mirrored
  (RAID1) on the host (afsfs5)

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AFS-cell rrz.uni-koeln.de

• AFS-versions (Clients)
• Transarc 3.4, 3.5, 3.6
• OpenAFS 1.2.xx, 1.3.xx, 1.4.x, 1.5.x
• Operating systems
• Solaris 5 bis Solaris 9
• Linux (mainly RHEL 3/4/5, other distributions to
  a lesser degree)
• Windows 2000, Windows XP (mainly 1.5.x-Clients)
• AIX, HP-UX, IRIX, OS-X ... (more or less
  everything ever supported by AFS/openAFS)

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AFS-cell rrz.uni-koeln.de

• Einige Eckdaten
• Kerberos 4 still in use (kaserver)
• Authentication usually via PAM, i.e. either Unix-
  or AFS-password
• Used packages with AFS-support
• OpenSSH
• Radius
• Pop/Imap
• Apache2 (mod_auth_pam)
• Sun GridEngine

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AFS-cell rrz.uni-koeln.de

• Backup-Strategy
• Not everything is backed up to tape
• Volumes with a name starting with 'H', are
  excepted from backup. Example picture archives
  (gt15 TB!)
• Special schedules for some of these volumes
• Full backup every 2 months, incremental in
  between
• 4 levels
• 2 times per week

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AFS and TSM Backup

• Several iterations
• Historically buta on AIX
• Until recently (4 months) butc on Linux
• Currently buta on linux
• Problems encountered
• buta was not stable on older versions of
  TSM/Linux
• butc was not stable on new versions of TSM/Linux
• Communication stalls in both cases

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Apache und AFS

• apache.init
• More than 100 apache-instances controlled by this
  script (gt20 of these completely in AFS)
• Improved version that controls netwoking, too
  (ifup/down of virtual interfaces)
• Available from/afs/rrz.uni-koeln.de/pub/rrzk/apa
  che.init/

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AFS-cell rrz.uni-koeln.de

• Activities and plans
• Upgrade to OpenAFS 1.4.x
• File servers (in progress) support for files
  bigger than 2 GB
• DB-serves (in preparation) support for
  supergroups (users really want this!)
• Switch from kaserver to Kerberos 5 (planned)
• Switch from NIS to LDAP (planned)

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AFS-cell rrz.uni-koeln.de

• Activities and plans
• Growing usage of AFS in institutes as shared
  Storage
• Acceptance is still spotty
• Problems arise mainly from Windows
  usersMS-Office / File Locking
• Re-Integration of external AFS-cells
• Institutes do no longer want to do the
  administration for themselves

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Thank you for listening!

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