There are 2 configuration parameters for the webservice in the file generic.xml in the config directory, ws_port and sqlite_db. ws_port defines the port on which the service will run and sqlite_db defines the location of the SQLite database file. By default an in-memory location is used. Alternatively the name of a file can be given or "TMP" or "TEMP" for HammerDB to find a temporary directory to use for the file.
<webservice> <ws_port>8080</ws_port> <sqlite_db>:memory:</sqlite_db> </webservice>