Skip to main content
NetApp Knowledge Base

FAQ about cascade snapmirror transfer and operation

  1. Last updated
  2. Save as PDF
Views:
108
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
dp
Last Updated:

Applies to

  • ONTAP9
  • SnapMirror
  • Cluster Environment(Cascade snapmirror configuration from A->B->C->D)
    • Node A: Current operational file server
    • Node B: Backup of current operational file server
    • Node C: New operational file server
    • Node D: Backup of new operational file server

Answer

This FAQ is focus on snapmirror transfer action of B->C :
 
Q1: What happens to SnapMirror data during the initial transfer and subsequent updates?
 
A1:
  • Initial Transfer (B->C):
    • Creates a baseline using data on Node B at the start of the transfer.
    • Updates to Node B during this transfer do not affect the baseline.
  • A->B Updates:
    • Occur daily as schedule setting, changing data on Node B.
    • If the initial B->C transfer takes 50 hours, A->B updates will happen twice.
  • Second Transfer (B->C):
    • Incremental, including only changes made to Node B after the initial transfer.

 

Q2: Is it possible to pause snapmirror B->C to configure CIFS related setting on C and then resume the snapmirror,  and what's the procedure ?

A2:  Yes, the procedure is below:

  1. Check the snapmirror relationship on C 

 ::>snapmirror show

  1. Pause the snapmirror relationship on C

 ::> snapmirror quiesce -destination-path vs2.example.com:dept_eng_mirror2

  1. Resume the snapmirror relationship on C

 ::> snapmirror resume -destination-path vs2.example.com:dept_eng_dp_mirror2

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.