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HiRDB Datareplicator Version 8 Description, User's Guide and Operator's Guide
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This section describes the types of data linkage systems you can design with Datareplicator.
With a unidirectional updating system, one end is the source system and the other end is the target system. In such a system, data flows in one direction only.
The following figure shows an example of a unidirectional updating system.
Figure 4-22 Example of a unidirectional updating system
![[Figure]](FIGURE/RZ04S210.GIF)
With a bidirectional updating system, each end can be the source or target system. In such a system, data flows in both directions.
The following figure shows an example of a bidirectional updating system.
Figure 4-23 Example of a bidirectional updating system
![[Figure]](FIGURE/RZ04S220.GIF)
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