I have worked in the past 5 months with Win2K3 and E2k3 clustering both
Active/Active and Active/Passive the issues which you talk about have in
large part gone. However we choose to go with Active/Passive because of
lic. Issue. In active/active one needs one more lic for win2k3 and E2k3
Ent but in A/P the second lic for E2k3 is not needed. We have had a
stable cluster for 60 days now (having installed the 120 day version of
E2K3) and were able to do it for $4800.00 above what the cost of having
no cluster would have been. 

I have listened to all arguments made for not clustering or why cluster
so on.... I am happy, my boss is happy, CTO is happy as well as the CEO
that we did it! An argument that WINS every other.


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dean Cunningham
Sent: Thursday, October 02, 2003 9:16 PM
To: Exchange Discussions
Subject: RE: Exchange 2003 & Clustering

Related , but totally unreleated to the thread, just some food for
thought :-)

The interesting thing about clustering, is more:

What are you trying to achieve?

Availability, ok, why? what are your business requirements?

Is it:

a) the organisation *really* can't do without email for a day.
b) I can't do without my diary for a day because it causes embarrassment
for me not knowing what meetings I am at and who my contacts are
c) something else

I worked for a company that needed b).
We looked at SANS and clusters and alike, priced it up and picked
ourselves off the floor. Scary price but , could still justify it.
We looked at other threats to the availability of exchange that a
cluster may not be able to eliminate, virii, power or infrastructure
failure (hmmm NY blackout springs to mind) and look at how to mitigate
them.

We then looked at b) again and said "how else can we get this outcome"

We then came up with the idea of an Pocket PC for every person that
needed their contacts and calendar.
At the end of the day for every risk we identified (apart for fire or
building collapse) was covered by a Pocket PC at a far cheaper price
that all the high availability gear we were looking at.

Nothing wrong with HA approach, but for what we wanted to achieve, it
was not the only answer.

cheers
Dean



>>> [EMAIL PROTECTED] 3/10/2003 3:23:55 p.m. >>>
Far from an endorsement (from me that is), but at TechEd there's was a
lot of talk from Microsoft and HP about them running E2k3 clusters in
house. 


Steve Evans
SDSU Foundation

-----Original Message-----
From: Dean Cunningham [mailto:[EMAIL PROTECTED] 
Sent: Thursday, October 02, 2003 3:39 PM
To: Exchange Discussions
Subject: Re: Exchange 2003 & Clustering


http://www.swinc.com/resource/exchange2003/section8.asp 

>>> [EMAIL PROTECTED] 3/10/2003 9:52:54 a.m. >>>
I'm sure you all remember the Micrsosoft Marketing bulletins that were
issued in the past regarding Exchange 2000 Active/Active clustering and
the potential prblems associated with fragmented memory and the
associated failover issues.

Does anyone on the list have field or lab experience with Windows Server
2003 and Exchange 2003 running Active/Active clustering.  Are the noted
issues inherent in the Exchange 2000 architecture and Active/Active
clustering still a concern with the new technology?

Wayne Peters
Resurrected Exchange Architect

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