Geographic mirroring

 

Geographic mirroring is a function that keeps two identical copies of an independent disk pool at two sites to provide high availability and disaster recovery.

The copy owned by the primary node is the production copy and the copy owned by a backup node at the other site is the mirror copy. User operations and applications access the independent disk pool on the primary node, the node that owns the production copy.

Geographic mirroring is a subfunction of cross-site mirroring (XSM), which is part of i5/OS^® Option 41, High Available Switchable Resources.

• Geographic mirroring concepts
  Use geographic mirroring to create a high available environment.

• Planning for geographic mirroring
  Follow the planning guidelines for geographic mirroring to ensure a correct set up.

• Configuring geographic mirroring with switchable independent disk pools
  To configure geographic mirroring, first configure your cross-site mirroring (XSM) environment and create the independent disk pool that you want to mirror.

• Managing geographic mirroring
  Find instructions to suspend and resume geographic mirror, detach and reattach the mirror copy, and delete the geographic mirroring configuration entirely.

• Example: Independent disk pools with geographic mirroring
  The following example shows one way that geographic mirroring can be configured.

 

Parent topic:

Cross-site mirroring (XSM)

Related concepts
Benefits of independent disk pools Switchable and stand-alone independent disk pools