[OpenAFS] Some questions about volume statistics

[Thomas Sesselmann]

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Hello,

i can get much info about the volume usage by 'vos examine <volumename> -=
extended'.

Example:
- -----------------------------------------------------------------------=
---------------------------
u.myuser                            536872895 RW   27845951 K used 298450=
 files On-line
    crb.kip.uni-heidelberg.de /vicepa
    RWrite  536872895 ROnly          0 Backup  536872897
    MaxQuota   35000000 K
    Creation    Fri May 11 10:45:09 2007
    Copy        Wed May 30 17:13:44 2007
    Backup      Fri Jun 15 00:02:25 2007
    Last Update Fri Jun 15 10:59:20 2007
    19535 accesses in the past day (i.e., vnode references)

                      Raw Read/Write Stats
          |-------------------------------------------|
          |    Same Network     |    Diff Network     |
          |----------|----------|----------|----------|
          |  Total   |   Auth   |   Total  |   Auth   |
          |----------|----------|----------|----------|
Reads     |       98 |       98 |        1 |        1 |
Writes    |     6052 |     6052 |        4 |        4 |
          |-------------------------------------------|

                   Writes Affecting Authorship
          |-------------------------------------------|
          |   File Authorship   | Directory Authorship|
          |----------|----------|----------|----------|
          |   Same   |   Diff   |    Same  |   Diff   |
          |----------|----------|----------|----------|
0-60 sec  |      318 |        0 |     3567 |        0 |
1-10 min  |       10 |        0 |      149 |        0 |
10min-1hr |        8 |        0 |        6 |        0 |
1hr-1day  |        8 |        0 |       15 |        0 |
1day-1wk  |        8 |        0 |        5 |        0 |
> 1wk     |      496 |        0 |        4 |        0 |
          |-------------------------------------------|

    RWrite: 536872895     Backup: 536872897
    number of sites -> 1
       server crb.kip.uni-heidelberg.de partition /vicepa RW Site
- -----------------------------------------------------------------------=
---------------------------

I can't understand the values :(

1. 19535 accesses =3D 98 reads + 1 read + 6052 writes + 4 writes + X
   X are lookup accesses ?

2. What is a 'Diff Network' for AFS?
   We have more subnets and the fileservers are typically in a other subn=
et.
   So this doesn't mean a different subnet, what else?

3. What is an Authorship for AFS?
   The Unix owner of an file? (The AFS-ACLs doesn't know an authorship.?)


I hope someone can explain this for me, because the two lines in the docu=
mentation is too few for me:
# The table labeled Raw Read/Write Stats table summarizes the number of t=
imes the volume has been accessed for reading or writing.
# The table labeled Writes Affecting Authorship table contains informatio=
n on writes made to files and directories in the specified volume.



thanks and best regards

Thomas Sesselmann

- --
Dipl.-Inf. Thomas Sesselmann
Kirchhoff-Institut f=FCr Physik
Universit=E4t Heidelberg
INF227 / D-69120 Heidelberg
Tel.:   +49/6221/54-9132
E-Mail: Thomas.Sesselmann@kip.uni-heidelberg.de
gpg-key: 0x9392E54B  or finger -l tsesselm@ix.urz.uni-heidelberg.de

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