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Multimapped, Alternate Path Synchronous Mirrors

iSCSI Target for Microsoft Windows.

Moderators: anton (staff), Max (staff), Constantin (staff)

Multimapped, Alternate Path Synchronous Mirrors

Postby werhun » Thu Feb 26, 2009 6:45 pm

I am new to StarWind and StarPort. Both products I have trials for are v4.0.

In setting up a synchronous mirror, I'm assuming it is a standard 2-node, one-way/path mirror.

However, I do not see clearly how I can configure an alternate path, 2-node, synchronous mirror. If this is possible, then can I also (and how) configure a multimapped, alternate path, 2-node synchronous mirror? Thus providing the following storage network diagram:

Thanks in advance,

Rich Werhun
rich@werhun.com

storagenetwork.JPG
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Richard S. Werhun
Datacenter Virtualization Solutions Consultant
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Re: Multimapped, Alternate Path Synchronous Mirrors

Postby Corpse » Sun Mar 01, 2009 2:16 pm

Hi Rich,

I would create 3 mirror devices (4 image files). 2 mirrors per every Starwind server (one image per server per every mirror) and the 3rd mirror would just link to 1st and 2nd morror. Topologically that would look like a RAID 1+1:

img 1.jpg
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If you would like to have mirror2 to be replicated to starwind srv2, that's also possible, but would require twice more storage on srv2.

Hope that helps
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Re: Multimapped, Alternate Path Synchronous Mirrors

Postby Robert (staff) » Mon Mar 02, 2009 4:38 pm

Rich,

Basically, the scenario described in the above thread will fit you. With the current version you will not be able to implement 100% "Replication" scenario as described on your drawing, however, we are working on this.

Thanks,
Rob
Robert
StarWind Software Inc.
http://www.starwindsoftware.com
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