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"Host" clustering rather than "appliation" clustering vitual servers in VMWare environment.

Posted on 2014-09-24
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Last Modified: 2014-09-26
Greetings all,

I need to cluster two virtual Windows 2008 R2 servers with SQL installed that are on separate ESX hosts.  In the documentation I have found I am only seeing how to cluster SQL.  What I would like to do is cluster two complete servers.  Does this make sense?  Two identical servers clustered - not two applications (SQL) on the servers.

Anyone seen this before?  If so - can you point me in the right direction for some good documentation.  I'm having trouble coming up with just the right combination of words to get good Google search results.
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Question by:yccdadmins
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Expert Comment

by:gheist
ID: 40342343
That is what vmware FT does, but it is slow in general.
SQL clustering is native to SQL server, and clustering rest of windows offers no added value.
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Author Comment

by:yccdadmins
ID: 40342363
VM "FT"?
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Accepted Solution

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Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40342381
FT = VMware Fault Tolerence

What are you trying to do, because VMware FT, both Servers are Locked Stepped, if the first server breaks or has a BSOD, so will the second server.

Because they are identical;...

Are you trying to HA the server or the service or application ?

load balance, available, or resilient ?

have you seen Double Take ?

VMware Fault Tolerance Product Brief

http://www.vmware.com/files/pdf/VMware-Fault-Tolerance-FT-DS-EN.pdf

VMware vSphere Availability Guide ESX 4.1vSphere
http://www.vmware.com/pdf/vsphere4/r41/vsp_41_availability.pdf

But it has many caveats!
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Author Comment

by:yccdadmins
ID: 40345123
Hello and thank you for all of the information.

I am trying to figure out the best way to provide failover without both servers and their SQL having to point back to a single storage array.  The common way to set this up is to set up two servers, cluster SQlL and have them both pointing back to a shared array where the data resides.  There is always replication between arra

The best way I can describe what I'm looking for is machine (or VM) failover rather than application - everything is written/changed on both servers (not just changes to SQL) and if one server fails it doesn't matter.  Basically, clustered servers rather than a clustered service.
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LVL 120
ID: 40345162
This can be achieved with VMware FT with lots of caveats or Double Take which works with physical or virtual.
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Expert Comment

by:gheist
ID: 40345462
You must patch windows monthly. None of FT solutions covers that downtime while SQL server cluster goes through just fine...
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Author Comment

by:yccdadmins
ID: 40346139
I think the links you have provided have me set.  Thanks for saving me some search time for sure!
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LVL 120
ID: 40346196
no problems....
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