No, the intent is that you use a single technology for both, as Chuck and Simon alluded to.
If you want to use vSphere plus DAG - then you look to VMware for support. Microsoft won't support that configuration, just as they don't support Quick Migration plus DAG on Hyper-V. DAG is a perfectly workable HA/FT solution, as well as a consistency solution. So are various other mechanisms supported by third parties, such as EMC, VMware, and NetApp. Pick a solution 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 1:48 PM To: MS-Exchange Admin Issues Subject: RE: Exchange 2010 on vSphere - Redundancy? Not hot spare as in automatic failover or anything, that's overkill for us, but the plan (not just Exchange but in general) is to replicate at SAN level between sites and have a vSphere box at the spare site that could mount the replica LUNs and give us basic functionality in a bad situation. A DAG between two VM's in the primary location should still deal with database corruption as I understand it, seems you almost have to decide between host resilience (HA/FT) or database consistency resilience (DAGs)? From: John Cook [mailto:john.c...@pfsf.org] Sent: 07 September 2010 18:42 To: MS-Exchange Admin Issues Subject: RE: Exchange 2010 on vSphere - Redundancy? Are you talking about having a hot site in the second location for failover? That's a job for Site Recovery Manager. Tuning Exchange depends on number of mailboxes, Public folders, Full outlook (cached mode) versus OWA and how those resources are managed/used. 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: Paul Hutchings [mailto:paul.hutchi...@mira.co.uk] Sent: Tuesday, September 07, 2010 1:36 PM 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. 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