Setup Completion and Basic Administrative Procedures
30 NAS 1000s Administration Guide
Installing and Configuring Data Replication Software
Data replication is the process of making a copy of system data. StorageWorks NAS Data
Copy is a real time data replication and failover software product that augments existing data
protection and tape backup strategies. This product is not intended to replace regular tape
backups.
Using NAS Data Copy, mission critical data and data that must be protected is marked. NAS
Data Copy replicates this data in real time from the production machine (source) to a backup
machine (target). The target machine can be either on site or off site. After the initial copy out,
NAS Data Copy monitors any changes to the specified data files and sends only the changes to
the target machine.
NAS Data Copy can operate in many different system environments, including:
■ Single machine—Source and target components are loaded on the same machine,
allowing data to be replicated from one location to another on the same machine.
■ One-to-one—One target machine, having no production activity, is dedicated to support
one source machine. An alternative one-to-one scenario is when each machine acts both as
a source and a target, actively replicating data to each other.
■ Many-to-one—Many source machines are protected by one target machine.
■ One-to-many—One source machine sends data to multiple target machines. The target
machines may or may not communicate with each other.
■ Chained—One or more source machines send replicated data to a target machine that in
turn acts as a source machine and sends selected data to a final target machine.
NAS Data Copy is supported for all deployments of the NAS 1000s.
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