A Database Interface to WAND for the Network Alerter Service.
James S. Ribeiro · Defense Technical Information Center (DTIC) · 1978
The Database Interface (DBI) is responsible for monitoring conditions on a data base managed by a particular type of Database Management System (DBMS). At the Wharton School there are several large databases which are managed by WAND, a CODASYL-like DBMS. This thesis outlines the design and implementation of a DBI for WAND. The DBI will be integrated into the Network Alerter Service (NAS) which is being designed and implemented as a general user service for ARPANET users. The NAS will allow the monitoring of databases at various sites on the ARPANET, for conditions of interest to the user. The WAND DBI is capable of efficiently monitoring these conditions or alerters, and resopnding appropriately when the previously specified condition occur. This monitoring must be done efficiently since the performance of the DBMS may otherwise become extremely degraded. (Author)