The POS Xpress server is a store level server application that typically resides in the back office of a retail store (although in small stores it can reside on a POS terminal). The Xpress server’s functions include:
Trickling of transaction log and journal data
Database access
Credit authorization
Consolidated reporting
End of day reporting
Processing of download file formats
Automatic data backup and recovery
Data redundancy
You may choose to run a single Xpress server in each store, or to also run a backup server at each location to provide an extra layer of redundancy should the primary server fail (see The Backup Server for more information).