Direct NFS (dNFS) usage with VDB

In the version 30 of Accelario, we introduced support of Direct NFS for Virtual Database.

Restrictions:

• The usage of this feature limits the amount of VDB per Accelario server to only one VDB running at a time.
  If you absolutely need to run VDB with dNFS enabled, you should use dedicated virtualization server for this VDB.
  Attempt to create additional VDB with dNFS enabled or a regular one, while the VDB with dNFS is running will result in an unpredictable behavior, most probably the instance may shutdown unexpectedly or attempt to write into the database will cause ORA-600 /ORA-700 ERRORS.

• AIX is not supported

• Accelario Virtualization cloud mode is not supported

Possible workaround:

Do not enable dNFS on the target server, but use “nconnect=4” nfs parameter for target agent,

this will increase the throughput of NFS mount.

Also, when Accelario Virtualization creates an Oracle VDB, by default we set “filesystemio_options=setall” which also increase the read/write throughput for virtual database.