description IBM Global Mirror Overview
IBM Global Mirror is a synchronous data replication solution that creates near-instantaneous copies of virtual machines and applications across geographically dispersed locations for rapid disaster recovery and business continuity.
help IBM Global Mirror FAQ
Is IBM Global Mirror synchronous replication?
No. IBM Global Mirror is an asynchronous replication method designed for long-distance disaster recovery, while IBM Metro Mirror is the synchronous option.
What does IBM Global Mirror replicate?
It replicates storage data from a source system to a remote target so applications can be recovered after a site failure. The exact protected objects depend on the IBM storage platform and Copy Services configuration.
How quickly can a Global Mirror target be used after a disaster?
Recovery time depends on the failover runbook, storage state, application dependencies, and the time needed to bring systems online. Replication alone does not prove that an application is ready to serve users.
Does Global Mirror provide zero data loss?
Because it is asynchronous, the remote copy can lag behind the source and may not contain the latest writes. The recovery point objective must account for that replication lag.
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