We have a group of relatively small servers (2 processors each) in a remote location that we would like to consider for use in "backing up" (for a disaster recovery scenario) a heavily-utilized 4-cpu application server that is using 4 dual-core processor slots. To be able to do this, I assume that we need to be able to configure a VMware Virtual Server that will span multiple physical boxes (at least two, I assume). I know we can map multiple virtual servers onto one physical box, but can we do the reverse? I can't seem to find any references to this anywhere. Is this possible? Is it advisable?
You will not be able to combine the resources of many ESX hosts to run a single VM accross them at the same time. A VM will only be able to run on a single ESX host. Currently ESX only supports 4 virtual CPU VMs so the disaster recovery server would only be able to use the processing capacity of 4 physical CPU cores on the host that it's running on.
The amount of times that this question comes up. you'd think somebody would sit up and take notice. Unfortunately it can not be done it cannot e done with any VMware product, there was a competitor of VMware called Virtual Iron that had a product out that did this however has died a death, Massimo and myself disagree on this but I do lament the loss of that product, it did show promise.
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