[OpenAFS] Re: Upgrade plan - any gotchas?
Tue, 13 Dec 2005 09:07:53 -0500 (EST)
Christopher D. Clausen wrote:
> What do you mean by "Primary"? Do you only have one AFS DB server for
> your cell? Most cells run at least 3 AFS DB servers (just look through
> the CellServDB file.)
> When you say "second," what do you mean?
I have two DB/PTS/file servers; the "primary" has IP xx.12, the second
> You probably want at least three VLDB, PTS, (and possibly BackupDB, if
> you use that) servers total. (So that two are up at any given time.)
> Ubik (syncronization protocol that AFS uses) grants an extra vote to the
> server with the lowest IP address, and if the server you take down has
> the lowest, you might not reach quorum and bad things can happen.
Okay - I will set up a third VLDB/PTS server.
>> 5. Copy /usr/afs/db, /usr/afs/etc/, and /usr/afs/local from the old
>> system partition to the new one. Mount /vicepa same as on the old
> You should NOT copy /usr/afs/db. These DBs will auto replicate from the
> other server and there is no need to pre-populate that directory. In
> fact, doing so may cause problems. And you can have all kinds of issues
> if you copy the sysid file from another server (this might be better
> now, but in general copying unique identifiers is NOT a good idea.)
> Also be aware that different servers may have different NetRestrict or
> NetAllow files and you don't want to copy them.
In this case, tho, I am not copying from another server but from the old
installation of the *same* server. Under those circumstances, don't I
want the sysid file to be the same?
> From: "ted creedon" <firstname.lastname@example.org>
> Don't forget that upserver and upclient re-populate the /usr/afs/etc
> directories automatically.
This machine is the update server, however - will it get repopulated or
will it depopulate the others?
System Administrator, Dept of Mathematics
Cornell University, Ithaca, NY, USA