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How Syndication Works

Syndication is the method used by IWWCM to replicate data from one instance of IWWCM to another. To enable Syndication, two items are defined:

  1. The Syndicator is the application that contains the data that needs to be copied to another application.
  2. The Subscriber is the application that retrieves the copies of the data from the Syndicator.

The relationship between Syndicators and Subscribers can be both a one-way or two-way relationship.

Example: One-way Syndication

Application 1

Development Server

Application 1 syndicates to Application 2.

Application 2 subscribes from Application 1.

Application 2

Development Server

 
 

Example: Two-way Syndication

Application 1

Development Server

Both applications syndicate to each other.

Both applications subscribe from each other.

Application 2

Development Server

 
 

Note that it is possible to setup a syndication relationship between the same two applications more than once. The additional syndication relationships would achieve no purpose and are not required because once a syndication relationship has been established between two applications, no further relationships are established.

Syndicators can syndicate to multiple Subscribers, and Subscribers can subscribe from multiple Syndicators.

Example: Multiple Syndication Relationships

Application 1

Development Server Application 2

Development Server

Both Application 1 and 2 syndicate to Application 3.

Application 3 subscribes from both Application 1 and 2.

Application 3

Development Server

 
 
 
 
 

Data Storage and Syndication

You can Syndicate between servers that use different IWWCM data storage methods. E.g. - you can Syndicate between a server that uses Cloudscape to store data and a server that uses DB2 to store data.

Database Replication versus Syndication

When first creating a new IWWCM application, it is better to copy an existing IWWCM data repository database to a new server, enable your new IWWCM application to use the new data repository, and then enable Syndication rather than trying to Syndicate an entire Site's data. be using the same type of database to be able to do this.

Syndication cannot be used to Upgrade a IWWCM Server

You can only Syndicate between Servers using the same version of IWWCM. This means Syndication cannot be used to send data between different versions of IWWCM. E.g. - you can not use Syndication to upgrade from a 1.0 server to a 2.0 server.

Syndicating after deleting indexes

Occasionally, IWWCM indexes are required to be deleted by IWWCM administrators. A full syndicator rebuild should be performed prior to resuming authoring. Otherwise, some recent changes to IWWCM items may not be successfully syndicated.

Parent topic: Syndication

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