About multisite exchange in LN

If you set up a multisite exchange, you can link the export and import processes to be performed as one process. These links are not tightly coupled, however, and are controlled at each site. You can run the export and import within one process, so that one process is based on the results of the other. Alternatively, you can run the export at the source system, copy the resulting ASCII files to, and run the import from, the target system. Other configurations are also possible, depending on your company’s business needs.

Each source can have multiple targets and each target can have multiple sources.

Multisite exchange works by setting up exchange links between the source and target sites. The exchange links are created at the target site and point to the export batches at the source site. If you define an exchange link, LN stores a subscription at the source site, which points to the import batch at the target site. The link is active when both, the exchange link at the target site and the subscription at the source site, are available.

If you run a regular export, Exchange checks whether any subscriptions are present. During a regular export, Exchange sends a message to the target site to specify which files have been exported and where the files are stored. The target site stores this information.

If you run a regular import, Exchange checks to see if any data is awaiting import. If so, LN copies the files from the source site to the target site and then imports these files. Afterward, the target site reports to the source site that the data has been imported.