Advanced Topics

Advanced Topics for Pervasive DataExchange

This appendix discusses advanced topics dealing with installation of Pervasive DataExchange. The following section is included:

DataExchange in a Many-to-One Configuration

Installing One First Site and Many Partner Sites

 

DataExchange in a Many-to-One Configuration

A many-to-one configuration involves multiple sites backing up data to a single site. In such situations, the choice of a First Site may not be immediately apparent. Consider the following example.

Figure E-1 Many-to-One Backup Configuration Example

You have three servers, A, B, and C, each on its own network. Each server runs its own database, dbA, dbB, and dbC, respectively. You want to implement a real-time backup solution, in which case a replicated copy of each database is maintained on the same machine.

Given this scenario, the most reasonable choice for the First Site is the backup location. Why? Part of the reason is that a replication network can have only one First Site. In addition, the backup location meets the following criteria:

Contains network connectivity to the Partner Sites.

Provides physical storage for the entire set of data.

Lends itself as the location from which the least amount of file copying is required. Replication design requires that some files are copied to the Partner Sites.

See Many-to-One Configuration in Pervasive DataExchange User’s Guide for an explanation of how to deploy DataExchange in a many-to-one configuration.

Installing One First Site and Many Partner Sites

Each replication network must have one site designated as a First Site. The other sites, the Partner Sites, must perform an initial replication with the First Site. The initial replication establishes the Partner Sites as part of the replication network.

Therefore, install only one First Site on your replication network. However, your replication network may have as many Partner Sites as needed.

To install Pervasive DataExchange on a many-to-one configuration

1	Install DataExchange on the First Site and one Partner Site as explained in To install Pervasive DataExchange on a two-machine configuration.

2	Run the installation program on each additional Partner Site.

3	In the Enter License dialog, type or paste your DataExchange license key. Use the license key supplied with the additional version of the Real-Time Backup Edition that you purchased.

4	Click Next.

5	For site type, click Partner Site.

6	Continue with step 8 in To install Pervasive DataExchange on a two-machine configuration.