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vSphere High Performance Cookbook by Prasenjit Sarkar

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vSphere Fault Tolerance design and its impact

It all depends on the workloads whether you want to configure Fault Tolerance (FT) protected Virtual Machines. One of the major reasons to choose FT is, if you require zero or near zero downtime for a critical workload. If you perform a current state analysis of an existing infrastructure and found some critical workloads already protected in physical infrastructure, it is most likely that these workloads require protection in a VMware virtual infrastructure as well. FT is simple to configure and can offer a wide range of workloads to be protected. However, FT works for uniprocessor VMs, which is a deal killer for most VMs that would otherwise get FT.

However, there are number of limitations associated ...

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