Comparison of mirroring methods

The information in the following table compares the various methods that you can use to mirror your volumes.

Table 1. Volume mirroring comparison
Description Local volume mirroring Stretched system Metro Mirror Global Mirror HyperSwap®
Number of sites that host application data 1 2 21 21 2
Support multipathing failover between mirrored copies with no application impact Yes Yes No No Yes
Host completion that is delayed by secondary write operation Yes Yes Yes No Yes
Bandwidth that is required on inter-site link Not applicable Maximum peak write bandwidth Maximum peak write bandwidth Varies3 Maximum peak write bandwidth
  • 1 Multiple partnerships permit configurations with three or four sites.
  • 2 Subject to application and other constraints. See also the topic Long-distance links for Metro Mirror and Global Mirror partnerships.
  • 3 For more information, see the information about copy types in the topic Metro Mirror and Global Mirror relationships.
Parent topic: Configuration details