For mounting the NFS filesystem on Linux, use the following mount options. Do not specify the rsize, wsize options as the system can get the default offered by FlashBlade which is 524288).
rw,bg,nointr,hard,tcp,vers=3,actimeo=0
Note: The actimeo=0 is required for Oracle RAC databases to turn off attribute caching forcing the NFS client to look for the attributes like atime, ctime, file permissions, owner etc., from the server every time. While this may increase the number of NFS operations, it guarantees the integrity of the file attributes across the RAC nodes. For non-RAC Oracle databases, you can leave the default actimeo and it is a not a requirement to set it to 0.
Even for dNFS, the filesystem(s) should be mounted using the above mount options. To persist these changes across reboots, please include them in the /etc/fstab file as given below. The IP address specified below refers to the data VIP from the FlashBlade.
10.21.214.100:/oradata01 /u02 nfs rw,bg,nointr,hard,tcp,vers=3,actimeo=0For more details on the Mount Options for Oracle files for RAC databases when used with NFS, please see the Oracle Support document Doc ID 359515.1.