This module covers the history, architecture, object management and Integrated File System of AS/400(IBM i).
The AS/400 server belongs to the mid-range category of servers released by IBM. Initially designed for small companies. But now catering to mid-sized to large companies.
It was initially designed for developing commercial (Data Intensive) applications. But today, because of the technological improvements in the hardware and memory management, it is capable for developing scientific (Compute Intensive) applications
This system grew from one user server to IBM Power server capable of running multiple-jobs, multi-threaded jobs, multiple operating systems on the same server
Basics: (Change the first point with the below content)
1. AS/400 supports Layered architecture which makes the applications independent of
the underlying hardware changes.
Terminologies: (Change to below)
1. IBM i: Current name given to the Operating System
2. Integrated Architecture: The database, security software, communication software
and other middleware are all integrated with OS itself.
3. Object Based system: Everything that is stored in DASD are treated as objects.
4. Single-Level Store: Different types of memory like main memory and DASD are
viewed on the same level called virtual memory
5. LPAR: Helps to virtually divide a single server into multiple partitions, which enables
server consolidation and can run multiple operating systems like IBM I, Linux, AIX on
a single server
6. Library: An object used to group other related objects together
7. Job: Any unit of work is done through a job
