# General Replication

## Key Terms

### Batch Replication

This term describes a replication mode of the File Replication Module (DFM). In this mode, files are transferred in regular intervals at the times specified in the corresponding replication order.

### Data Exchange Module (EER)

This module controls the organization of file transfers and data replication as well as storage of the corresponding meta information at distributed sites. The files are provided and checked in by the FileServer. However, the FileServer does not control the actual data exchange. Document files are then stored in the local vault.

### DDM

Distributed Data Management is the basic concept of the General Replication Module (DDM), the File Replication (DFM), and the Data Distribution Module (EER). The General Replication Module (DDM) manages data that is distributed over several locations and vaults and which can be accessed using the other two modules.

### DFM

Distributed File Management describes the function of the File Replication Module (DFM).

### EER

EDB Extract and Replication describes the concept of the Data Distribution Module (EER).

### Local vaults

Vaults of a specific distributed site in which replicated data is to be stored locally.

### Replication, data replication

Exchange of data (e.g. document files or files containing meta data) between several distributed locations. The files are later stored in the local vault.

### File Replication Module (DFM)

This module controls the replication of document files for several distributed sites. The transfer mode is selected as part of the check-out procedure: The transfer may be initiated immediately or at a specific time (initiated using a batch process). The FileSever module is used for the distribution of files. Document files are then stored in the local vault.

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