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date: Thu, 8 Mar 2007 14:21:53 -0500,
group: microsoft.public.exchange.design
back
Re: CCR across Datacenters
On Thu, 8 Mar 2007 14:21:53 -0500, "Scott"
wrote:
>Has anyone tested CCR across datacenters yet? Any idea how much traffic
>between nodes are? We're looking at this scenario for DR, as our failover
>requirements are pretty strict, but perhaps may look at SCR if CCR isn't
>feasible. We'll have a thick pipe between datacenters (45mbps), but
>locations will be around 1,000 miles between each other.
>
>Its my understanding that CCR nodes require to all be on the same subnet,
>which we would have to span VLAN's. Network guys are working those bits,
>but just curious if anyone has tried this yet....
>
>Scott
>
45Mb is not a thick pipe between datacentres by any stretch, in fact
it's tiny by common standards.
Unless you're operating a trunked network where the same subnet
operated in both locations you are correct in that you will not be
able to run CCRs.
I have seen CCR run over a WAN using the self same procedures. It's
not rocket science but you need to look at what traffic is on the link
and how much email you're doing so you can understand how many log
files you're going to generate and where the HT boxes are located.
Are you looking at doing it? You might well be better off doing this
on the SAN using mirroring technology and booting from the SAN so you
can fire up the LUNs on standby hardware when you need to.
date: Thu, 08 Mar 2007 19:39:19 +0000
author: Mark Arnold [MVP]
Re: CCR across Datacenters
Yeah, our initial thoughts were utilizing SnapMirror and SME from NetAPP.
Worked great on my last project and tested through the roof on production.
But it does require some manual intervention and isn't something you can
restore service in 30 minutes or less. This customer, however, is somewhat
MS brainwashed and would like to utilize an MS solution if at all possible.
I do agree that CCR offers some benefits and may decrease the restore time,
but like you said the bandwidth may be an issue and that right now is still
up for debate (as far as what will be the utilized BW vs. total available).
"Mark Arnold [MVP]" wrote in message
news:35p0v2drpsi08surlkpkfscbnhmkl25otu@4ax.com...
> On Thu, 8 Mar 2007 14:21:53 -0500, "Scott"
> wrote:
>
>>Has anyone tested CCR across datacenters yet? Any idea how much traffic
>>between nodes are? We're looking at this scenario for DR, as our failover
>>requirements are pretty strict, but perhaps may look at SCR if CCR isn't
>>feasible. We'll have a thick pipe between datacenters (45mbps), but
>>locations will be around 1,000 miles between each other.
>>
>>Its my understanding that CCR nodes require to all be on the same subnet,
>>which we would have to span VLAN's. Network guys are working those bits,
>>but just curious if anyone has tried this yet....
>>
>>Scott
>>
>
> 45Mb is not a thick pipe between datacentres by any stretch, in fact
> it's tiny by common standards.
>
> Unless you're operating a trunked network where the same subnet
> operated in both locations you are correct in that you will not be
> able to run CCRs.
>
> I have seen CCR run over a WAN using the self same procedures. It's
> not rocket science but you need to look at what traffic is on the link
> and how much email you're doing so you can understand how many log
> files you're going to generate and where the HT boxes are located.
>
> Are you looking at doing it? You might well be better off doing this
> on the SAN using mirroring technology and booting from the SAN so you
> can fire up the LUNs on standby hardware when you need to.
date: Tue, 13 Mar 2007 14:26:11 -0400
author: Scott
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