Kolab numbers.

[Luca Villani]

Alle 16:16, giovedì 8 aprile 2004, Bo Thorsen ha scritto:


> > Clustering is a must in an HA scenario.
> >
> > Let me explain a possible failover architecture.
>
> ... and clustering is not the same as failover.

Yes.
But failover is a clustering consequence.
Due to clustering impossibility I had described a failover scenario (failover 
is the only must I have).



> > In this scenario, can cyrus work on an Intermezzo shared storage? I
> > know it don't work on NFS...
>
> I think you hit the only possible problem nail spot on here.

Google is our friend:

http://www.irbs.net/internet/info-cyrus/0112/0151.html
http://asg.web.cmu.edu/archive/message.php?mailbox=archive.info-cyrus&msg=5093

The second link involve NDB raid too... :-)


> I can't answer that question for you. When you do figure out if it's
> possible or not, please mail the info here. That will be very useful for all
> of us. 

We will test a single server in later weeks...
If this work fine, then we will start failover scenario tests.
And I will mail you all the results...



> > And in this scenario (cyrus working on top of a network shared
> > storage), why can't I running two *separate* server working toghether?
>
> Now you're getting very close to what we plan on doing. We don't have any
> failover involved in the multilocation setup, but each of the servers
> will have a full replication of the other machines. But we will still
> maintain a master server, which makes our future solution a bit different
> still.

I understand.



> I stand by my promise. You will not be able to bring Kolab down with 300
> users. No matter if that's 300 2MB per mail senders.

Ok.
But if somewath goes wrong, you will *MUST* pay me some beers... ;-)



> But you might want to have very high performing network cards :-)

We would done all the job on two HP DL380, with legacy network cards.



-- 
Luca Villani                Wireless Solutions S.p.A.  -  Dada Group
NOC Manager                 Europe HQ: via Castiglione 25, 40124 Bologna Italy
http://www.wseurope.com     Tel: +39 051 2966826     Fax: +39 051 2966800
GPG public key available    Mobile: +39 348 5298542  UIN: 76272621