1. ViaSQL Access Server

2. ViaSQL Access Server Functions n Accept client requests –execute them against DB2 –execute specified RSP –connect to Legacy Data Server and pass request n Receive results and return them to client OS/390 CICS Legacy Data Server DB2 VSAM IMS DL/I Seq. RSP Other ViaSQL Access Server

3. ViaSQL Access Server n Runs as CICS transaction –default ID is MDI –more CICS transaction IDs as desired allows different configurations n Each client connection specifies transaction ID –specified explicitly in APPC –specified through port number in TCP/IP n “Multi-user multi-tasking” –one CICS region can handle concurrent users

4. Managing the ViaSQL Access Server n Starting and stopping n Disabling and enabling client access n Testing access –to DB2 –to Legacy Data Server n Configuring or checking configuration

5. Starting the ViaSQL Access Server n Must be explicitly started in CICS region before client activity begins n Two methods –automatically, with CICS region, in CICS PLTPI –manually, using MDII transaction from 3270 screen, in CICS region, enter MDII should also start TCP/IP listener (if configured for TCP/IP connectivity) n One startup applies to all ViaSQL Access Server transactions in region

6. Return Messages n MDIT000 — successful for both n MDI000 — successful for ViaSQL Access Server (TCP/IP not configured) n MDIT007 — TCP/IP-related failure

7. Stopping the ViaSQL Access Server n First, disable client access (optional but nice) n Two methods for stopping –automatically, with CICS region, in CICS PLTPI –manually, using MDIZ transaction from 3270 screen, in CICS region, enter MDIZ should also stop TCP/IP listener (if configured for TCP/IP connectivity) n One stop applies to all ViaSQL Access Server transactions in region

8. System Administration Menu n 3270 screen to CICS region enter MDI ADMIN S Y S T E M A D M I N I S T R A T I O N - - - - - - - - - - - - - - - - - - - - - - - A-Site Configuration B-Perform an SQL Processing Test C-Create System Tables D-Execute an SQL Statement E-Attachment Definitions X-End System Administration Specify Function ===> Access Server Version 2.8.3 Copyright (C) Viaserv Inc. 1989 - 2000 All Rights Reserved

9. Testing Access S Q L P R O C E S S I N G T E S T - - - - - - - - - - - - - - - - - - - A-Perform test using Legacy Data Server B-Perform test using DB2 Specify Target ===> F3=END ENTER=PERFORM TEST

10. ViaSQL Access Server Configuration n As many as required –different configurations –different priorities n All configuration sets stored in single VSAM dataset n Identified by transaction ID

11. Site Configuration Screen S I T E C O N F I G U R A T I O N TRANSID: MDI - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-Tuning Parameters B-Processing Parameters C-Transaction Management Parameters D-Catalog Access Parameters E-DB2 Parameters F-Administration Password G-Application Notification H-Global Parameters I-TCP/IP Parameters J-NATURAL RSP System Variables X-Return to Main Menu Specify Parameter Type ===> PF3=END ENTER=DISPLAY PARAMETERS

12. Tuning Parameters T U N I N G P A R A M E T E R S TRANSID: MDI - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Maximum Record Size 32700 Maximum Block Size 32706 Maximum Request Size 32700 Maximum Result Size 0 No. of Blocks in a Chunk 10 Legacy Data Server Blocksize 8192 PF3=END ENTER=UPDATE

13. Processing Parameters P R O C E S S I N G P A R A M E T E R S TRANSID: MDI - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Temporary Storage Type NONE Force First 25 Rows? YES Allow Binary Data? YES Date Format ISO Time Format ISO Treat Empty RSP Input Pipe as Error? NO Host Decimal Separator Translation PERIOD Password Encryption? YES CSA Attach Retry Count 0 CSA Attach Retry Interval 0 Verify TCP/IP UserIDs/Passwords? Yes PF3=END ENTER=UPDATE

14. Transaction Management Parameters TRANSACTION MANAGEMENT PARAMETERS TRANSID: MDI - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Commit/Rollback Method PROG Treat RSPs as a Unit of Work? YES Request Validation Exit NO Result Validation Exit NO PF3=END ENTER=UPDATE

15. Catalog Access Parameters C A T A L O G A C C E S S P A R A M E T E R S TRANSID: MDI - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Option User Can Change Catalog Qualifier SYSIBM YES Table types for SQLTables YES System Tables NO Views NO Synonyms NO Tables YES Aliases NO Exclusions by Authorization 0 YES 0. None 1. By User 2. Non-Authorized 3. Non-Authorized, Include Public PF3=END ENTER=UPDATE

16. Tech Support Recommendations n Know how to stop and start ViaSQL Access Server (MDIZ, MDII) n Get documentation of all ViaSQL Access Server configurations from customer