I had a question today around support for SMP-FT in an EMC VPLEX environment. It is well known that SMP-FT isn’t supported in a stretched VSAN environment, but what about other types of stretched storage? Is that a VSAN specific constraint? (Legacy) FT appears to be supported for VPLEX and other types of stretched storage?
SMP-FT is not supported in a vSphere Metro Storage Cluster environment either! This has not been qualified yet, I’ve requested the FT team to at least put it up on the roadmap and document max latency tolerated for these types of environments for SMP-FT just in case someone would want to use it in a campus situations for instance, despite the high bandwidth requirements for SMP-FT. Note that “legacy FT” can be used with vMSC environment, but not with VSAN. In order to use legacy FT (single vCPU) you will need to use an advanced VM setting: vm.uselegacyft. Make sure to set this setting when using FT in a stretched environment!