I now have three sites where I am replicating Exchange out to a data centre with DAG. All three key roles are on the same server, so it is being done with two servers. The FSW is on another server (a domain controller).
I have had reason to failover on one site, and while the databases went over, there was a problem with the clients. This was to be expected, as the CAS array was pointing to one server only. I wasn't do a NLB CAS Array over the WAN. However a quick change on the DNS and the clients reconnected. Of course if the WAN went, then the local clients would continue to operate correctly, because nothing has changed for them. Windows 2008 R2 Enterprise, Exchange 2010 SP1 Standard, all in vSphere 4.1. The sites are connected on a site to site VPN. What I also do is have all email come in through the data centre server. This means that in the event of the main Office going down, the email is being delivered to a server I control. Simon. -- Simon Butler MVP: Exchange, MCSE Sembee Ltd. e: si...@sembee.co.uk w: http://www.sembee.co.uk/ w: http://www.amset.info/ w: http://blog.sembee.co.uk/ Need cheap certificates for Exchange, compatible with Windows Mobile 5.0? http://CertificatesForExchange.com/<http://certificatesforexchange.com/> for certificates from just $23.99. Need a domain for your certificate? http://DomainsForExchange.net/<http://domainsforexchange.net/> Exchange Resources: http://exbpa.com/ From: Paul Hutchings [mailto:paul.hutchi...@mira.co.uk] Sent: 07 September 2010 18:37 To: MS-Exchange Admin Issues Subject: RE: Exchange 2010 on vSphere - Redundancy? Hmm the devil really is in the detail isn't it. I've not yet dug into the nitty gritty just the headlines/demos - so that's something else that's new. OK let's start again :) Assuming two separate location sites with good ethernet connectivity, both with vSphere, the primary location with vSphere Standard (possibly Advanced depending on some other things) on at least two hosts with dual physical CPUs what would you do to make what is, in performance terms, a single box Exchange server more robust? Thanks. From: John Cook [mailto:john.c...@pfsf.org] Sent: 07 September 2010 18:31 To: MS-Exchange Admin Issues Subject: RE: Exchange 2010 on vSphere - Redundancy? You have to keep in mind that Fault Tolerance in VSphere is still restricted to one processor and that's not going to change anytime real soon. If you need high availability (which it sounds like) then that's readily available .I was at VMWorld and they were very noncommittal on timeframe for multi-processor support. John W. Cook Systems Administrator Partnership For Strong Families 315 SE 2nd Ave Gainesville, Fl 32601 Office (352) 393-2741 x320 Cell (352) 215-6944 Fax (352) 393-2746 MCSE, MCTS, MCP+I, A+, N+, VSP4, VTSP4 From: Michael B. Smith [mailto:mich...@smithcons.com] Sent: Tuesday, September 07, 2010 1:23 PM To: MS-Exchange Admin Issues Subject: RE: Exchange 2010 on vSphere - Redundancy? Not supported. You choose a particular HA technology to use and stick with it. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: Paul Hutchings [mailto:paul.hutchi...@mira.co.uk] Sent: Tuesday, September 07, 2010 1:20 PM To: MS-Exchange Admin Issues Subject: Exchange 2010 on vSphere - Redundancy? We're currently using Exchange 2003 but should be going to 2010 in the next few months. In terms of performance, a single server should do the job, so that leaves redundancy. I'm interested in peoples experiences of things like vSphere Fault Tolerance combined with things like DAG groups? Ultimately we're not a 24/7/365 operation but within sensible limits I want to make our email system as robust as I can. Thanks. ________________________________ MIRA Ltd Watling Street, Nuneaton, Warwickshire, CV10 0TU, England Registered in England and Wales No. 402570 VAT Registration GB 114 5409 96 The contents of this e-mail are confidential and are solely for the use of the intended recipient. If you receive this e-mail in error, please delete it and notify us either by e-mail, telephone or fax. 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