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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Establish a concurrent SRDF relationship

Use the symrdf migrate -setup command to establish a concurrent SRDF relationship among the three sites:

Figure 1. R2 migration: establishing a concurrent relationship

The establish action creates a concurrent SRDF relationship to transfer data from the existing source device to both target devices.

In the preceding example, the R1 becomes the R11 device writing to two target R2 devices.

  • The source site continues to accept I/Os from the host.
  • There is no need to shut down the applications writing to R1.
  • No temporary pairing (like an R1 migration) is required.
  • The source and target devices do not have to be close to synchronization.
NOTE:

It may be necessary to modify existing device group or composite group scripts to accommodate the new configuration.

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