Is IBM's HyperSwap technology supported for VMware vSphere Metro Storage Cluster?
I could not find it in compatibility matrix and the only solution VMware has on its website is IBM SAN Volume Controller: Implementing vSphere Metro Storage Cluster using IBM System Storage SAN Volume Controller (2032346) ...
Though, IBM is telling us that vMSC will work perfectly using HyperSwap.
As far as I know, IBM HyperSwap is already a 1.5 year old product. Is there any reason that explains why it is still not a certified solution by VMware for using with vMSC?
Hyperswap is not correctly implemented by IBM for ESX clustering (so for more 95% of cases), still in 2021. We are trying to use it for our continuity plan but the volumes are swaping from a datacenter to another one without any control. In an ESX cluster, each ESX node realize I/O commands on the mapped volumes/datastores. These I/O commands are not correctly interpreted by the hyperswap algorithm causing the swaps. So with no correct reason an ESX from datacenter A will use a volume on datacenter B. So it implies latency performance problems even without any fault.
Another point not correctly handle by IBM Hyperswap is the split brain. The no-elected IBM array will shutdown, so even local volumes will be unavailable .