For each node in a RAPID system there will be a number of files that are used to store the data. As the database grows new files are created based on time or size, this is known in the system as a “rollover”. Without any intervention, the file count will grow continually, but you can specify that there are a maximum number of files that are retained online for each node. Older files in excess of that limit will automatically be detached from the database and deleted (Note: if copies are stored offline they may be re-attached if needed). This mechanism allows the size of the database to be controlled automatically