IBM DS8000 User Manual page 52

The following IBM System Storage Resiliency Family functions are available as
optional features:
v Point-in-time copy, which includes IBM System Storage FlashCopy and
v Remote mirror and copy, which includes the following functions:
v Remote mirror and copy for System z environments, which includes z/OS
The point-in-time and remote mirror and copy features are supported across
various IBM server environments such as System i
well as servers from Sun and Hewlett-Packard.
You can manage these functions through a command-line interface called the DS
CLI and a Web-based interface called the DS Storage Manager. The DS Storage
Manager allows you to set up and manage the following types of data-copy
functions from any point where network access is available:
Point-in-time copy (FlashCopy)
The FlashCopy function enables you to make point-in-time, full volume copies of
data, with the copies immediately available for read or write access. In System z
environments, you can also use the FlashCopy function to perform data set level
copies of your data. You can use the copy with standard backup tools that are
available in your environment to create backup copies on tape.
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DS8000 User's Guide
Space-Efficient FlashCopy
The FlashCopy function enables you to make point-in-time, full volume copies
of data, so that the copies are immediately available for read or write access. In
System z environments, you can also use the FlashCopy function to perform
data set level copies of your data.
– IBM System Storage Metro Mirror (previously known as Synchronous PPRC)
Metro Mirror provides real-time mirroring of logical volumes between two
DS8000 storage units that can be located up to 300 km from each other. It is a
synchronous copy solution where write operations are completed on both
copies (local and remote site) before they are considered to be done.
– IBM System Storage Global Copy (previously known as PPRC Extended
Distance)
Global Copy is a nonsynchronous long-distance copy function where
incremental updates are sent from the local to the remote site on a periodic
basis.
– IBM System Storage Global Mirror (previously known as Asynchronous
PPRC)
Global Mirror is a long-distance remote copy function across two sites using
asynchronous technology. Global Mirror processing is designed to provide
support for virtually unlimited distance between the local and remote sites,
with the distance typically limited only by the capabilities of the network and
the channel extension technology.
– IBM System Storage Metro/Global Mirror (a combination of Metro Mirror
and Global Mirror)
Metro/Global Mirror is a three-site remote copy solution, which uses
synchronous replication to mirror data between a local site and an
intermediate site, and asynchronous replication to mirror data from an
intermediate site to a remote site.
Global Mirror
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