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IBM Z/OS TEST LATEST VERSION
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IBM Z/OS TEST LATEST VERSIONTP - Transaction Processing, and Operations Data - ANSWER are day-
to-day and Decision Support are analyzed to make decisions
- DS data pulled from historical data
- Used for forecasting and predictive analytics
Transaction Processing Communications (3 Types) - ANSWER 1. RPC
2. Peer-to-peer
3. Queuing
TP monitors - ANSWER Transaction processing monitors
CICS
IMS
MQ
TP monitor advantages - ANSWER Ensures that a transaction
processes completely, or if an error occurs, that appropriate actions are
taken
CICS - ANSWER Customer Information Control System
TP Mon #1: Customer Information Control Systems CICS - Transaction
Server - ANSWER CICS provides interfaces to DBMS and formats the
info when the data is returned and sends a reply back to the user.
Connects multiple CLIENTS to mult SERVERS to access mult DBs
TP Mon #2: IMS - Information Management System - Transaction Server
- ANSWER Uses transaction process monitor that uses a Queuing
mech for handling terminal requests
TP Mon #3: MQ - WebSphere Message Queuing - Transaction Server -
ANSWER Provides program-to-program communication via an
application programming interface.
,transaction - ANSWER A set of operations that transforms data from
one consistent state to another. It is sometimes referred to as a logical
unit of work, or LUW
Business Transaction - ANSWER Interagction where something is
exchanged. It could involve, money, products, info, service requests, etc.
Usually recorded
Business Logic - ANSWER The user applications that implement these
RULES are referred to as Business Logic.
how transactions/events are converted into metrics, scorecards, &
dashboards
ACID - ANSWER Atomicity, Consistency, Isolation, Durability
CICS - ANSWER CICS - Gerneral purpose OLTP widely used in z/OS.
Provides interfaces to other system services and DBMS.
OLTP - ANSWER Online Transaction Processing
IMS TM - - ANSWER incident management system - Transaction Mgr.
IMS TM uses queuing communication.
Provides interfaces for systems services and comm.
OTMA - ANSWER Open Trasaction Manager Access
allows mult comm managers to connect to IMS.
Using OTMA, IMS receives trans req from non-IMS sources and routes
responses back.
An IMS system can communicate w/ a CICS region, and that IMS TM
can be coordinated w/ the CICS trans Mgr for two=phase commit
between the two DB Mgrs
MQ / Time Independance, Queues etc. - ANSWER Message Queue or
Message Queueing
MQI - MQ Interface
, Enqueue message | Dequeue message
usually persistent and stored on non-volatile storage device
WebSphere MQ:
Provides the queue for program to program comm via an API.
No req for comm, programs can execute independently of each other, no
need to run at the same time.
The Queue stores messages safely until the other program is ready to
retrieve them. This property of WebShere MQ is called time-
independence
Sys1 / ProgramA ENQUEUEs MESSAGE / WS MQ Mgr
Sys2 / ProgramB DEQUEUEs MESSAGE / WS MQ Mgr
Transaction Processing Communications - ANSWER Inter-process
communications need to:
- Break up an application program into separate processes
- Programs have to comm between processes
- Programs have to exchange messages.
3 MODELS:
1. RPC - Remote Procedure Calls
- Mimics the behavior of local procedure calls within a single process.
When a program in one process calls a program in another process in
another address space, it does so by calling a procedure and getting a
value returned just as if two procedures were running within a single
address space.
- Messages are used for communication between processes
- Typical example of RPC messaging:
-- Issue call, wait, get return code, proceed
2. Peer-to-Peer
- Conversational style, programs executing simultaneously
- Uses architecture interfaces such as SNA APPC, CPI-C, and TCP/IP
- Conversation half-duplexed,
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