We have a 2 node Server 2019 cluster with the scale out file services role installed. We are using it to store FSLogix user profile disk. It's worked great up until recently, the CPU on the active node is very high causing the storage to run brutally slow. Trying to figure out what could cause this as our disk latency spikes to numbers in the seconds. We have an open ticket with MS, but no word or ideas as of yet.
Our S2D is stored on 4x intel 800GB Data Center SSDs and we have about 50-80 users signed into Remote desktop at a time. The only thing S2D is used for in RDS is the FSLogix User Profile Disk, which is essentially the Appdata folder.
Not sure if this is a storage issue and with it being software it's maxing out the CPU or if the CPU is maxed out causing the storage to suffer. Currently each cluster node has a E5-2670V3 CPU and we can add a 2nd if needed to each if the CPU is the bottle neck.