[OpenAFS] ubik problem in a mixed IBM AFS/OpenAFS environment

[Nicolescu, Edward L]

Jimmy,

thanks. I was wrongly expecting my two-server scenario to unfold as if 
I had only the two of them mentioned in CellServDB, not three... My
oversight...

On another hand, it would be nice to have an algorithm allowing the 
selection of a sync-site even when 2 out of the 3 db servers go down.

Thanks again.

Edward

> -----Original Message-----
> From: jimmy@e.kth.se [mailto:jimmy@e.kth.se]
> Sent: Monday, May 10, 2004 5:30 AM
> To: Nicolescu, Edward L
> Cc: openafs-info@openafs.org
> Subject: Re: [OpenAFS] ubik problem in a mixed IBM AFS/OpenAFS
> environment
> 
> 
> "Nicolescu, Edward L" <edward@bnl.gov> writes:
> 
> > Hi everybody,
> > 
> > here is the problematic configuration:
> > 
> > 2 afs db servers,
> 
> You have 3 DB-servers at the current timne.
> 
> rafs01.rcf.bnl.gov
> rafs02.rcf.bnl.gov
> rafs03.rcf.bnl.gov
> 
> Do you want to disable 1 or 2 of them ?
> 
> > as expected, given the lower ip address. However, shutting 
> down the db
> > server processes on the IBM AFS machine,
> > causes the other one to loose its ability to act as a sync 
> site. This should
> > not happen as the lowered ip machine
> 
> if you have 2 or 3  VLDB-servers configured and take down 1 
> or 2 of them
> the last one will refuse to be sync-site, this is how it should work.
> 
> If you want only 1 DB-server which i do NOT recommend, you 
> have to tell
> that server by editing the cellservdb that it is alone.
> 
> > should be able to cast a 1/2 vote in its favor and break 
> the tie. But this
> > doesn't happen in the above configuration.
> > 
> > Any ideas ? If needed, I can provide related udebug and 
> rxdebug output.
> > Thanks.
> 
> not necessary:
> 
> http://www.pdc.kth.se/cgi-bin/survey/ubik?130.199.6.52+130.199
.6.69+130.199.6.51

/Jimmy