[THIN] Re: OT: Exchange fallover
- From: Philip Walley <mythinlist@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Thu, 01 Dec 2005 10:29:56 -0600
double-take, that's what i was trying to think of.
Evan Mann wrote:
I don't know the technical details behind it, bout NSI's Software
Double-Take does bit-by-bit replication of your stores to a stand by
server. NSI then has a customized .EXE that created to handle the
actual failover of Exchange. Since I paid for their software, and they
give me the tool, I didn't go looking into "how" the failover work.
Originally, you had to do some crazy stuff by manually "breaking" your
production server, and manually restoring off the backup one and then
back to the original.. all as part of the setup. Then NSI modified
their failover program so pretty much all of that was unnecessary. You
just needed another server in the same exchange org, and the EXE
handled the rest.
This is the most simplistic way of doing it. There's another product
from XOSoft that is similar, and better according to some people.
These methods require dedicated hardware to sit idle, so you have to
buy resources that you may never use.
------------------------------------------------------------------------
*From:* thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]
*On Behalf Of *Nick Smith
*Sent:* Thursday, December 01, 2005 10:53 AM
*To:* thin@xxxxxxxxxxxxx
*Subject:* [THIN] OT: Exchange fallover
Seem to get much better response on Exchange matters here than on the
official Exchange list J
|’m in the process of planning a fallover site for our TS Farm. Farm
Is based in London, failover in Northampton, far enough away from any
foreseeable disaster up to a nuclear one.
Using GPs and scripting, plus replication software for document files,
am reasonably confident about everything other than Exchange.
I’ve now spent a **lot** of time looking for any articles that deal
with restarting Exchange on a different server. This must be something
that big boys do all the time, but I can’t seem to find much reference
to how Exchange actually deals with data-stores in multi-site
environments, let alone in DR situations.
What I **think** I want to do is have a good on-line backup of the
information stores overnighted to Northampton, and restore this into
the server there. However, I have no idea if this will work.
Particularly, AD knows which server each mailbox is on. While I can
probably run a script to change this manually, it seems logical to me
that it should be possible to move between different sites (In a
non-DR scenario), and log onto different Exchange Servers, but still
be able to access one’s mailbox. In fact, it would seem insane not to
be able to do so.
Can anyone point me in the direction of articles about how Exchange
actually works in multi-site scenarios, or, even better, how DR can be
made to work (Fro preference, without £000s of software).
Many thanks,
Nick
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