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* TP Market: $17billion-1995, $20billion-1997 (Standish Group), CICS has generated more revenues than any other piece of software! - Jim Gray
* From main frames, DB managers took care of the data, TPMs of applications and proceses
* In 1986 Syabse introduced - Stored Procedures & Triggers, miltithreaded server, the others followed….
* TP-Lite: Transaction management using RDBMS stored procedures, triggers, multithreaded connections - some of the TPM functions right on the RDBMS
- function shipping, some funneling
- single-function tran. mangt., RPC-like calls
* TP-Heavy: the new crop of TPMs…CICS, Encina, Tuxedo, Pathway, Top End, and ACMS that allow PC clients to intiate comples multiserver trans.
- process managment, load balancing, glaobal trans. synch.
- multiple resource managers, funneling
* TP-Lite lacks:
- no global trans. control, primitive process management,
- single resource manager (the RDBMS), no ACID nesting
* Scope of commit:
- TP-Lite - must code ACID properties - to handletransactions that expand over more than one procedure call.