Hi,
After a controller failover due to hardware issue, some of our Virtual Machines was stopped. NetApp and VMware KBs seem to lead to avoiding NFS 4.1.
NetApp KB : VMware NFSv4.1 based virtual machines are powered off after ONTAP 9 storage failover events
VMware KB : 2089321
According to VMware, this problem is due to the release of the lock because the grace period established by the nfs server is lower than the takeover duration (if i correctly understand these bulletins). This is our case. The takeover took more than 96 seconds while the lock is maintained up to 90 sec (tr-4067).
For NetApp (KB), if we need high availability, we should avoir NFS 4.1. For VMware (KB), it works as it should, so don't wait for a resolution.
Am i the only one to use vSphere with NetApp/NFS4.1 ? I have more than 400 VMs hosted on NFS 4.1 datastore. Rather than migrating to NFSv3 datastore, could I increase lock grace period ? Which value ?