Labels:text | screenshot | document | rectangle | parallel | number | font OCR: ARIZONA'S INTEGRATED INFORMATION ENVIRONMENT DCE SERVER CLIENT When the University of Arizona's SIS 2000 IT team ODBC moved to migrate student and financial information Apps Directory Security Time systems to a cheat/server platform, they opted fort Services Services Power a three tier, client/server architecture, With the Encina. Bulldet Apps Open TP monitor as the middle tier. This architecture, Say Horizon's it officials allows the use of the two-tier model when Connection Cilent DCE it makes sense for departmental applications. HTE DCE TCPAP ISPAP NETWORK TCPAP TCPME DCE CUSsel Cornell University Stateless HTTP CUSSP Open Horizon's Server Protocol Connection Server Broker Embedded SQL Open Horizon's USIS ICICSÍVSAM) FIS Transarc's Encina Database Application Business Functions MUS APPLICATION SERVER DATABASE SERVER SOURCE UNIVE The My'S-based legacy systems include the Student Information System, in CICS with VSAM, and the Financial Information System, in IDMS. For client access to applications, the University uses the Web and ODBC Open Horizon's Connection middleware allows. ODBC to tunnel over DCE, and enables a single ODBC interface to access both the business logic on the application server for three-tier, applications, and the data on the database server for two-tier architectures. Connection's Application Broker links two-tier applications with server-based business rules, Te monitors and legacy systems .; The University is using PowerBuilder, which supports ODBC, for developing new client/server applications. According to John Detlofs @ development specialist with the University, the team has tested PowerBuilder applications to ensure they can access. business logic on the application server, and expects to have prototype applications ready within the year
