vSphere Fault Tolerance will soon support SMP

Came across this session in the VMworld 2011 lineup – (BCO2874 vSphere High Availability 5.0 and SMP Fault Tolerance – Technical Overview), according to the description the Fault Tolerance feature which previously only supported VM’s with a single vCPU will soon support vSMP. Providing this support has been a major development challenge for VMware as it is not an easy task to keep multiple CPUs in sync via lockstep. In fact I talked to VMware about it at the vSphere 5 launch and they said they were working with the CPU vendors to see if they could make it easier for them to do this. Well looks like they finally found a way, it will be interesting to see what they come up with, sign up for the VMworld session to find out more including a live demo. Since it’s not currently in vSphere 5.0 I’m guessing it may make it into a point release like vSphere 5.1.


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    • Duncan on July 19, 2011 at 11:19 pm

    Good catch Eric 🙂

    I was waiting on someone to spot it, will be cool!

    • Avram on July 19, 2011 at 11:39 pm

    Of course it will. Now that we have the option (well, soon, I guess) we’ll be more inclined to want to use vSMP HA – which will of course increase our vRAM usage. Which means we can’t really use it.

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