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KSDS is a short form of Key Sequential Data Set. KSDS is very commonly used dataset among all types of VSAM datasets. KSDS datasets have the most similar features as ISAM and contain DATA and INDEX components. The DATA component has all the data records in a logical ascending order based on the key.
VSAM - KSDS - KSDS is known as Key Sequenced Data Set. A key-sequenced data set (KSDS) is more complex than ESDS and RRDS but is more useful and versatile. We must code INDEXED inside the DEFINE CLUSTER command for KSDS datasets.
KSDS is abbreviated as Key Sequenced Data Set. A key-sequenced data set (KSDS) is more complex than ESDS and RRDS but is more useful and versatile. When you define KSDS cluster, We must code INDEXED inside the DEFINE CLUSTER command. KSDS cluster consists of following two components.
CICS® supports access to the following types of data set: key-sequenced data set (KSDS), entry-sequenced data set (ESDS), and relative record data set (RRDS) (both fixed and variable record lengths). VSAM data sets are held on direct-access storage devices (DASD) auxiliary storage.
22 Ιαν 2017 · This tutorial explains how file operations are performed on ESDS, KSDS, RRDS files of VSAM access method.
KSDS have two components: Data Component and Index Component. Index component contains an entries with key field and pointer to the location of its corresponding record. Data component contains actual data records(along with its Key field value)
Virtual Storage Access Method (VSAM) [1] is an IBM direct-access storage device (DASD) file storage access method, first used in the OS/VS1, OS/VS2 Release 1 (SVS) and Release 2 (MVS) operating systems, later used throughout the Multiple Virtual Storage (MVS) architecture and now in z/OS.
