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azn2kew
Champion
Champion

Fault Tolerance feature in vSphere

Its a great feature after watching live demo, but how is licensing works in terms of SQL, Exchange or Oracle servers where we have them cloned so are we going to pay 2x SQL, Exchange, Oracle etc...? that's a lot of money! anyone knows?

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Regards,

Stefan Nguyen

VMware vExpert 2009

iGeek Systems Inc.

VMware, Citrix, Microsoft Consultant

If you found this information useful, please consider awarding points for "Correct" or "Helpful". Thanks!!! Regards, Stefan Nguyen VMware vExpert 2009 iGeek Systems Inc. VMware vExpert, VCP 3 & 4, VSP, VTSP, CCA, CCEA, CCNA, MCSA, EMCSE, EMCISA
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5 Replies
depping
Leadership
Leadership

I would say you will still only pay 1 license. It's only installed once, and there's only one active session. the other one is a synced "ghost"

Duncan

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admin
Immortal
Immortal

I think yes, you probably need an extra license if you follow the law of M$ to the letter. But then technically you need that if you simply want to vMotion your VMs between hosts more frequently than once every 90days!

Alex



www.phdvirtual.com

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Smoggy
VMware Employee
VMware Employee

Good question.

One thing with fault tolerance (FT) is that you need to remember that there is no truely installed 2nd instance of the VM.Its not like you have a copy of the application running in the FT VM that could be used for other tasks independently of the primary.

With FT you only have ONE install of the binaries

(ie single C: drive vmdk assuming here our VM and its apps are all installed in same single vmdk ) and a read only secondary VM that can't do anything but see it (it being the vmdk)

Technically the FT VM is not real until it becomes the primary VM and then it can access the vmdk, but its the same vmdk so same OS and application code.

hope that helps,

Lee Dilworth

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azn2kew
Champion
Champion

Sounds like a plan thanks for verification! Now, lead me to another questions, to implement FT, you should plan your ESX host cluster resources and storage more wisely due to the fact, it clone the instance itself and uses same vCPU and RAM in this case? Can you explain in depth how the resources being utilize since this is just a shadow copy (no actual activities takes place) so in reality, resources wouldn't be tax too much to implement FT?

If you found this information useful, please consider awarding points for "Correct" or "Helpful". Thanks!!!

Regards,

Stefan Nguyen

VMware vExpert 2009

iGeek Systems Inc.

VMware, Citrix, Microsoft Consultant

If you found this information useful, please consider awarding points for "Correct" or "Helpful". Thanks!!! Regards, Stefan Nguyen VMware vExpert 2009 iGeek Systems Inc. VMware vExpert, VCP 3 & 4, VSP, VTSP, CCA, CCEA, CCNA, MCSA, EMCSE, EMCISA
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pyosifov
Enthusiast
Enthusiast

Couldn't quite get the question but here it goes...

First processing occurs on both ESX hosts., meaning that the same amount of RAM and CPU are required. So I hope this answers a bit of your question.

Actually IF you only need one license than.... wow you could save a lot of cash by NOT buying Enterprise SQL. Most of the people need Enterprise only for clustering.

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