Virtual Storage Access Method (VSAM) Certification
About Virtual Storage Access Method (VSAM)
Virtual Storage Access Method (VSAM) is a data storage management system provided by IBM's z/OS operating system and its predecessors. It is used to organize, access, and manage data stored on disk and tape storage devices. VSAM uses a file-based structure to store data, and provides an interface for applications to access and manipulate that data.
VSAM files are divided into three different types:
Keyed Sequential Data Set (KSDS): This type of file is used to store data that is accessed in a sequential order based on a key field.
Entry Sequenced Data Set (ESDS): This type of file is used to store data that is accessed in the order in which it is entered.
Relative Record Data Set (RRDS): This type of file is used to store data in a fixed-length record format, with access based on a relative record number.
VSAM provides several advantages over other data storage methods:
It allows for faster data access and retrieval times by organizing data into keyed or indexed structures.
It provides efficient storage utilization by allowing for the dynamic allocation and deallocation of storage space.
It provides for data recovery and recovery options in the event of system failure.
VSAM is widely used in mainframe environments, it is one of the standard data management systems for IBM's z/OS operating system, and it is supported by a wide range of software tools and utilities.
Who should take the Virtual Storage Access Method (VSAM) Certification exam?
Virtual Storage Access Method (VSAM) course is suitable for:
Mainframe programmers and systems administrators.
IT professionals who work with mainframe systems.
Data center administrators and managers.
Anyone interested in learning about VSAM, a key component of IBM's mainframe operating system.
Virtual Storage Access Method (VSAM) Certification Course Outline
Virtual Storage Access Method (VSAM) is a file management system for IBM mainframe operating systems such as z/OS and OS/390. It is used to manage and access data stored on direct access storage devices (DASD) and tape drives. Some of the main features and characteristics of VSAM include:
VSAM provides a hierarchical organization of data, allowing for efficient access and retrieval of records.
It supports both indexed and sequential access methods, making it suitable for a wide range of applications.
VSAM provides data protection and recovery capabilities, such as record-level sharing, to ensure data integrity and consistency.
It supports multiple data sets and provides sharing options.
VSAM also provides data compression and space management
VSAM files can be defined as either a Keyed Sequential Data Set (KSDS) or an Entry Sequenced Data Set (ESDS)
VSAM files can be used as input and output for various IBM mainframe utilities and applications.