Mainframe_Systems_Complete_Overview_Comparisons.pptx

Mainframe education

1. Mainframe Systems Overview Comprehensive Explanation of Mainframe Architectures and Technologies

2. What is a Mainframe System? - A mainframe is a high-performance, large-scale computer system designed to handle massive workloads. - Features include high reliability, scalability, and security. - Used in industries like banking, insurance, healthcare, and government for mission-critical tasks. - Capable of processing millions of transactions per second.

3. Mainframe Batch Architecture - Processes large volumes of data sequentially without user interaction. - High throughput, automated scheduling, and data-driven. - Key Tools: JCL, COBOL, DB2, VSAM, IMS, CA-7, Control-M. - Use Cases: Payroll processing, invoicing, report generation.

4. Batch Architecture Workflow 1. Job Submission: Defined using JCL. 2. Scheduling: Managed with tools like IBM Tivoli or Control-M. 3. Execution: Jobs processed sequentially or in parallel. 4. Output: Results stored in datasets or printed.

5. Mainframe Online Architecture - Supports real-time, interactive processing. - Handles multiple concurrent users with 24/7 availability. - Key Tools: CICS, IMS DC, DB2, Java, WebSphere, z/OS Connect. - Use Cases: ATM transactions, flight bookings, POS systems.

6. Online Architecture Workflow 1. User Request: Sent via terminal or web interface. 2. Middleware: Processes request (e.g., CICS). 3. Database Interaction: Retrieves or updates data. 4. Response: Displays results instantly.

7. Batch vs. Online Architecture Batch: - Sequential, non-interactive. - Scheduled during off-peak hours. - Tools: JCL, COBOL, DB2. Online: - Real-time, interactive. - Continuous availability. - Tools: CICS, Java, WebSphere.

8. Programming Languages in Mainframes - Legacy Languages: COBOL, Assembler, PL/I. - Database and Query: SQL, JCL. - Modern Languages: Java, Python, Node.js, R. - Scripting and Automation: REXX, CLIST. - System-Level: C/C++, Fortran, Shell Scripting.

9. Integration of Batch and Online - Modern systems often integrate batch and online processing. - Example: E-commerce systems process orders in real-time (online) and update inventory overnight (batch). - Ensures scalability and efficiency.

10. Midrange Systems - Smaller, less powerful than mainframes but cost-effective. - Targeted for SMEs or departmental needs. - Examples: IBM Power Systems, HPE ProLiant, Oracle SPARC. - Operating Systems: UNIX, Linux, IBM i.

11. Mainframes vs. Midrange Systems Mainframes: - High scalability, fault tolerance, and transaction speed. - Examples: IBM zSystems. Midrange: - Moderate performance for smaller-scale tasks. - Examples: IBM i, HPE ProLiant.

12. Comparison: Mainframe vs. Midrange Systems | Feature | Mainframe | Midrange | |-----------------------|------------------------------------|-----------------------------------| | **Purpose** | Large-scale enterprise computing | Departmental or SME applications | | **Performance** | High scalability and fault tolerance| Moderate performance | | **Examples** | IBM zSystems | IBM i, Oracle SPARC | | **Operating Systems** | z/OS, Linux on Z | UNIX, Linux | | **Cost** | High | Relatively lower | | **Workload** | Millions of transactions/sec | Limited to departmental needs |

13. Comparison: Batch vs. Online Processing | Feature | Batch Processing | Online Processing | |-------------------------|-----------------------------------|------------------------------------| | **Processing Mode** | Sequential, non-interactive | Real-time, interactive | | **User Interaction** | None | Direct user interaction | | **Execution Time** | Scheduled during off-peak hours | Continuous, 24/7 availability | | **Performance Goal** | High throughput | Low latency, quick response | | **Tech Stack** | JCL, COBOL, DB2 | CICS, Java, WebSphere | | **Examples** | Payroll, billing | ATM transactions, e-commerce |