Configuring topic persistence
Use the Server.xml configuration file to configure the topic persistence feature.
Enabling persistence creates log files which can use a significant amount of file storage. Make sure to monitor the amount of space available in the server file system. See Topic persistence for information about the approximate storage requirements.
If you want to back up or restore the persistence log, you should stop the Diffusion server.
When enabled, persistence is applied to all topics by default. You can disable persistence for an individual topic using the PERSISTENT topic property.