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Tomislav

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We are considering consolidating some old servers to 2 new Dell PowerEdge R610 and one PowerVault MD3200i and are wondering what to do with our mail server.
I know that Connect is disk IO heavy so I'm worried that a 1Gb link to iSCSI won't do.

What are your experiences? Has anyone done this before?
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renefn

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We're running Kerio Connect in a Windows Server 2003 virtual machine in our small (3 hosts) VMware environment. It's running on our Dell EqualLogic PS4000VX SAN and is performing perfectly, no problem there.

We have around 100 users, mostly running KOFF.

Regards,
Rene Frej Nielsen
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Tomislav

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renefn, I have a few questions:
Are you running the virtual servers completely off the iSCSI? Both the system drives and the mail storage?

Is each server connected with iSCSI individually or do they share one connection?
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renefn

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Hi,

All virtual servers are running of the SAN. That's the only real way of doing it. Then you could choose to mount an iSCSI volume directly inside the virtual machine by using the MS iSCSI initiator, but that will only gain you a few percent in performance.

The data drive that stores the mail store inside the virtual machine is located on the same volume/datastore as the system drive and quite a lot of other system drives and data drives of other virtual machines. That's not a problem here with our workload, but for optimal performance you could choose to create a dedicated volume/LUN on the SAN for the mail store and create a dedicated datastore (or use iSCSI inside the client).

We have three hosts that each connect to the iSCSI network with two gigabit connections and the EqualLogic itself has two gigabit connections. All virtual machines share the same two gigabit connections on the hosts.

Regards,
Rene Frej Nielsen
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Tomislav

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That's good to know.

At the moment I'm planing to do this the "recommended" way: 4 iSCSI ports per server -> 2 dedicated iSCSI switches -> storage (8 ports). The number of ports depends on the final configuration I get the OK for, but this is the main idea (redundancy).

Other then the Mail server I'll be running an Apache server for Trac and maybe some other internal lightweight site. I think this should work nicely.
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renefn

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It sounds like your setup will be plenty powerfull although I don't know how fast the PowerVault is. Unless you put a lot of IO heavy VM's on that system then you should be safe. Kerio Connect really doesn't take that much resources.

Regards,
Rene Frej Nielsen
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