The
system provides Copy Services functions that can be used to improve
availability and support disaster recovery.
The following Copy Services functions are available for
all supported hosts that are connected to Lenovo Storage V7000:- IBMFlashCopy function
- Makes an instant, point-in-time copy from a source volume to a target volume.
- Creates either point-in-time copies on a system, or a point-in-time data copy
on another system.
- Metro Mirror
- Provides a consistent copy of a source volume on a target
volume. Data is written to the target volume synchronously after it is written to the source volume, so that the copy is continuously updated.
- Global Mirror
- Provides a consistent copy of a source volume on a target
volume. The data is written to the target volume asynchronously and the copy is continuously updated. However, the
copy might not contain the most recent updates when a disaster recovery operation is performed.
- Global Mirror with change volumes
- Provides support for Global Mirror
with higher recovery point objective (RPO) by the use of change volumes. This function is for
environments that have less bandwidth available between the sites than that update rate of the
replicated workload.
- IBMHyperSwap function
- Provides dual-site, active-active access to a volume. Data is written to the copies on both
sites synchronously so that both copies are continuously updated and can be used immediately if the
other copy becomes unavailable.
Metro
Mirror, Global Mirror, Global Mirror with change volumes, and HyperSwap
functions are types of remote copy or remote replication.
If the system has a remote mirroring license
and is configured correctly, the following copy_type values can be specified in
the CLI or management GUI to create remote copy
relationships:- activeactive
- global
- metro