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Can Ontap CIFS clients survive a LIF migrate?

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Applies to

  • Data ONTAP 8
  • ONTAP 9
  • CIFS/SMB

Answer

Yes, LIF migration is non-disruptive for SMB 2.0 and later. 

  • SMB 2.0 and 2.1, the use of durable file handles allows the session to reconnect without any impact to the application. 
  • SMB 3.0 and 3.1, will have a persistent open state that facilitates the non-disruptive behavior.
  • However, durable/persistent file handles are exclusive to a single-file open.
  • Non-disruptive behavior might be affected when multiple users are accessing the same file. 

Additional Information

  • For additional information regarding CIFS Protocol best practices, refer to TR-4543.
  • For additional information regarding Hyper-V over SMB best practices, refer to TR-4172.
  • For additional information regarding SQL Server over SMB best practices, refer to TR-4247.