Please can someone help me.
We have 2 server farms one Xenserver Pool and Nutanix Cluster
The Xenservers get its vhd storage (NFS and iSCSI) from Nutanix
Xenserver 8.0 (aka Citrix Hypervisor 8.0)
Nutanix is on AOS 5.10.4
We upgrade AOS from 5.5.4 to 5.10.4 no problems about a month later we upgrade Xenserver from 7.0 to 8.0 no problems a few days later the VMs on Xenserver started to slow down to a crawl, mean it takes 30 - 40 minutes for the VM to boot. Sometimes it just hangs and we have to force a restart. If the VM eventually come up we see in the windows resource manager 100% disk active time with less than 300KB/s throughput and Disk Queue Length between 5 -30.
Windows and Linux VMs have the same problem. Xentools drivers are up-to-date with the install files presented with Xenserver 8.0 install iso.
Before the upgrades everything was working fine. Currently we have another duplicate farm with AOS 5.10.4 but the Xenserver is still on 7.0 and that is working no issues
Does anyone have an idea what is going on?