I believe they have always recommended an Active/Active cluster.

Paul Roubicheux sais the E2K3 clusters awesomely. 

-----Original Message-----
From: Schneider, Bryan D [mailto:[EMAIL PROTECTED] 
Sent: Friday, June 27, 2003 6:14 PM
To: Exchange Discussions
Subject: RE: Clustering... is it worth it?

You have the benefit of quick recovery in event of hardware failure on the
server (not likely typically). But, it is really nice for maintenance where
you have to apply patches, security updates, virus engine updates, service
packs, etc... You can failover in a matter of seconds and you have as much
time as you need to work on the server without interrupting users or
bouncing email.
 
On an active/active cluster we host 16,000 users, 2500 using Outlook and the
rest using OWA 2000. We can have both virtual machines running on one
quad-Xeon 700Mhz without users noticing much of a slowdown at all. Exchange
2003 with Windows 2003 runs more efficiently so far in our tests. However,
Microsoft is now recommending ACTIVE / PASSIVE so you have a fresh server to
failover to. 
 
You already have a key component - SAN - so I would cluster in a heartbeat.
We haven't had any issues - except for a corrupted db which we attributed to
the SAN. 
 
2003 promisses to make clustering better, but we haven't tested that yet.

        -----Original Message----- 
        From: William Lefkovics [mailto:[EMAIL PROTECTED] 
        Sent: Fri 6/27/2003 7:10 PM 
        To: Exchange Discussions 
        Cc: 
        Subject: Re: Clustering... is it worth it?
        
        

        But do consider revisiting this with 2003.
        
        With Microsoft running 16,000 users on an 8-node cluster now.
        Windows2003 and Exchange2003 of course.
        
        
        ----- Original Message -----
        From: "Martin Blackstone" <[EMAIL PROTECTED]>
        To: "Exchange Discussions" <[EMAIL PROTECTED]>
        Sent: Friday, June 27, 2003 5:04 PM
        Subject: RE: Clustering... is it worth it?
        
        
        > That's pretty much the argument against clustering.
        > In fact, many folks will tell you that Exchange needs much more
hand
        holding
        > in a cluster.
        >
        > -----Original Message-----
        > From: MSX dude [mailto:[EMAIL PROTECTED]
        > Sent: Friday, June 27, 2003 4:50 PM
        > To: Exchange Discussions
        > Subject: Clustering... is it worth it?
        >
        > Upper management here is inquiring about clustering our exchange
server.
        > We already have our PRIV, PUB and DIR on a SAN.  I don't see the
benefit.
        > If the server itself fails, I can rebuild it in an hour.  If the
database
        > corrupts it would have taken the cluster down too.
        >
        > I have searched the internet but all I find are vendors praising
        clustering
        > because they want to see you something.  Does anyone have any
links or
        > whitepapers are unbiased in their opinions?
        >
        
        
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