Skip to main content
NetApp Knowledge Base

Why does NFS IO stop during takeover and giveback or during aggregate relocation

  1. Last updated
  2. Save as PDF
Views:
10,308
Visibility:
Public
Votes:
5
Category:
ontap-9
Specialty:
nas
Last Updated:

​ ​ ​  

Applies to

  • ONTAP 9
  • NFSv4.x
  • NFSv3

Answer

  • I/O stops when a storage system serving data over NFSv4 to clients is in a takeover/giveback mode or when an operation such as an aggregate relocation is performed
  • NFSv4.x is a stateful protocol similar to SMB/CIFS
  • A short outage is expected anytime you change the interface you are connected to while using stateful protocols
  • Applications are expected to recover during grace period
  • When NFSv3 is being used, if an aggregate is relocated to another node, NLM lock reclamation occurs for the duration specified by  locking.grace_lease_seconds node level option, therefore, the NFSv3 access will be affected as well.

Additional Information

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.