I was also excited to hear about general NFS-like NDU possibilities for CIFS clients when cDOT8.2.1 came out with SMB3.0 support.  The reality is that this capability has limited uses (Hyper-V, SQL Server), due to the additional overhead required to store and replicate persistent handle information (key to the NDU function) between nodes in an HA pair.  I take that to mean, go ahead and use this feature if your share has a handful of files, but not if it has millions, typical of most file shares.

Here’s a TR that does a pretty good job of discussing the details under the cover, with a specific recommendation to only use this on Hyper-V over SMB shares.

http://www.netapp.com/us/media/tr-4172.pdf
Francis Kim
Direct: 510-644-1599 x334 
Cell: 415-606-2525
 
BerkCom | www.berkcom.com
NetApp | Cisco | Supermicro | Brocade | VMware

On Jul 29, 2015, at 3:26 AM, Milazzo Giacomo <G.Milazzo@sinergy.it> wrote:

Hi all,
 
with cDOT is there a way to avoid that CIFS sessions fall during a takeover?
In 7 Mode when an NDU operation is performed CIFS must is interrupted and open CIFS sessions fall if not closed before.
Is there a way using failover groups of the data LIF to avoid this?

Regards,
 
_______________________________________________
Toasters mailing list
Toasters@teaparty.net
http://www.teaparty.net/mailman/listinfo/toasters