Fundamentals of Remote Copy
This section presents an overview of the common principles used in remote copy applications. Like many things in storage, the concept seems very simple, but the implementation is much more complicated and must be done with the highest attention to detail.
Basic Architecture of Remote Copy Applications
Remote copy applications store data temporarily from write I/O operations and forward it to another storage subsystem at the same or another site. Specialized storage controllers are used to forward and receive the remote copy data. We will use the terms forwarding controller and receiving controller in this chapter to indicate the roles these controllers assume in the remote copy system.
A network of some type is used ...
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