Site-Report Universität zu Köln
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AFS-Workshop 2008 Dr. Stephan Wonczak [email protected] © 2008 ZAIK/RRZK 1 Dr. Stephan Wonczak Abteilung Systeme Zentrum für Angewandte Informatik der Universität zu Köln (ZAIK/RRZK) Site-Report Universität zu Köln
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Site-Report Universität zu Köln. Dr. Stephan Wonczak Abteilung Systeme Zentrum für Angewandte Informatik der Universität zu Köln (ZAIK/RRZK). Contents. Status of cell rrz.uni-koeln.de Servers Backup Apache and AFS Plans and activities. AFS-Cell rrz.uni-koeln.de. about 71600 Volumes - PowerPoint PPT Presentation
Transcript of Site-Report Universität zu Köln
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 1
Dr. Stephan Wonczak
Abteilung Systeme
Zentrum für Angewandte Informatik der Universität zu Köln (ZAIK/RRZK)
Site-ReportUniversität zu Köln
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 2
Contents
Status of cell rrz.uni-koeln.de
Servers
Backup
Apache and AFS
Plans and activities
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 3
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
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 4
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)
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 5
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)
AFS-Workshop 2008
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© 2008 ZAIK/RRZK 6
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)
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 7
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)
AFS-Workshop 2008
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© 2008 ZAIK/RRZK 8
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)
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 10
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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Dr. Stephan Wonczak
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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 (>15 TB!)
Special schedules for some of these volumes
Full backup every 2 months,
incremental in between:
4 levels
2 times per week
AFS-Workshop 2008
Dr. Stephan Wonczak
© 2008 ZAIK/RRZK 13
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 (>20 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/apache.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 users:
MS-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!
これで終わります。
