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Have had this discussion on many occasions and this 3Sharp whitepaper by Missy Koslosky would have proved very useful as an external reference point… High Availability Choices for Exchange Server 2007: Continuous Cluster Replication or Single Copy Clustering
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When you use the Exchange 2007 Mailbox Storage Calculator on the face of it you seem to get a lot of fluff added to your storage design. ..fluff upon fluff. Will run through some of the reasoning where it may not seem obvious in the cell comments
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What’s the guidance if you’ve got 3 data centres, you're stretching Exchange 2007 mailbox CCR nodes between two of them and the link speed and latencies are similar between all 3. Should you put the File Share Witness (FSW) in the 3rd data centre?
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For companies who have to support a lot of ‘heavy usage’ clients connecting to their Exchange 2007 platform 24 hours a day, tuning online maintenance is going to be important.. You have to be quite careful about staggering online maintenance to minimise
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This is a nice blog from Tim McMichael (a Microsoft Escalation Engineer)… If you want to know why replicated storage groups sometimes appear to be initializing have a read. Get-storagegroupcopystatus = Initializing “When storage groups are in an
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So can you just use a crossover cable for private cluster communications between CCR (& SCC) nodes. Well the answer, not very surprisingly, is yes; but there are a couple of caveats… Be careful and test the cable, especially if it’s a DIY job;
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Let’s start with one of the obvious ones - Fewer Servers supporting More Mailboxes … OK so it’s one thing being able to say that you can support more for less but it’s another proving it. So how do you prove that you actually save money by
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Have had a number of conversations with customers concerning the merits of achieving both data centre resilience and cost cutting by stretching CCR and avoiding deploying both CCR and SCR. i.e. 3 for the price of 2. Firstly I wouldn’t consider
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I blogged recently about log roll and CCR – ‘ New log created every 90 seconds... ’ and I need to qualify something… To quote the relevant bit; “In effect log roll will occur every 90 seconds when insufficient transactions occur to fill the current
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Let's say that over a period of an hour only a very small number of transactions are generated for a particular CCR enabled storage group in Exchange Server 2007. If those changes add up to less than 1MB's worth of transactions and are therefore
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I recently made the assumption (not very accurately as it turns out) that deploying large mailboxes of a GB and above in online mode is not generally realistic. I think it’s a fairly common misconception that having a local cache is always going to improve
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The ability to continue to provide a full service to your user community in the unlikely event of the loss of a datacentre is an increasingly common requirement. The use of Continuous Replication (CCR and SCR) with Exchange 2007 Service Pack 1 is an obvious
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Ok so here's my thoughts on the whole SAN ( Storage Area Network ) versus DAS ( Direct Attached Storage ) argument... No-one's surprised to learn that storage is still one of the main topics of conversation when architecting an Exchange infrastructure
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This is a great white paper for anyone evaluating what storage solution to deploy for Exchange 2007... There has been a lot of discussions about storage and Exchange 2007 and how the debate has changed from when we were architecting Exchange 2003
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Let's say I have two data centres and a requirement that in the event of the loss of the primary data centre I can restore the messaging service with minimal downtime and minimal data loss. The decision is made to use SCR. I have also however
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