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 fkim@berkcom.commailto:fkim@berkcom.com
BerkCom | www.berkcom.comhttp://www.berkcom.com/ NetApp | Cisco | Supermicro | Brocade | VMware
On Jul 29, 2015, at 3:26 AM, Milazzo Giacomo <G.Milazzo@sinergy.itmailto: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,
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