How to use LISTCAT command in mainframe?

LISTCAT command. Use the LISTCAT command to list entries from a catalog. The entries listed can be selected by name or entry type, and the fields to be listed for each entry can additionally be selected. In this book, “with SMS” indicates that SMS is installed and is active.

What is LISTCAT in jcl?

The LISTCAT command used to view dataset attributes, usage statistics, space allocation information, Security information, creation and expiration information etc,.. It is useful when specially listing attributes and characteristics of all VSAM and non-VSAM objects cataloged in a VSAM or ICF catalog.

How do I view VSAM file attributes?

LISTCAT command in VSAM is used to view the properties of VSAM file like volume details, space details, path details, and catalog details. LISTCAT can list many properties like cluster, data, index, spae details, history, volume and much more.

What is repro in JCL?

Repro. REPRO command is used to load data into VSAM dataset. It is also used to copy data from one VSAM data set to another. We can use this command to copy data from sequential file to VSAM file.

What is VSAM alternate index?

Alternate index are the additional index that are created for KSDS/ESDS datasets in addition to their primary index. An alternate index provides access to records by using more than one key. The key of alternate index can be a non-unique key, it can have duplicates.

What is VSAM file in mainframe?

VSAM or Virtual Storage Access Method is a file storage access method used in MVS, ZOS, and OS/390 operating systems. It was introduced by IBM in 1970’s. It’s a high-performance access method to organize data as files in mainframes. VSAM is used by programming languages in mainframes to store and retrieve data.

What is checkpoint mainframe?

Checkpoint/Restart allows the interrupted program to be restarted at the job step or at a point other than the beginning of the job step. The checkpoint routine is invoked from the COBOL load module containing your program. You specify these checkpoints by using the COBOL RERUN clause in the Environment Division.

What is AIX in VSAM?

Define AIX command is used to define Alternate Index and specify parameter attributes for its components. 2. NAME. NAME specifies the name of Alternate Index.

What is the use of alternate index?

An alternate index provides access to the records in a data set that uses more than one key. It accesses records in the same way as the prime index key of an indexed data set (KSDS).

How do I create a VSAM in mainframe?

Procedure

Locate the JCL to create the VSAM data sets.
Modify the JCL and access method services commands.
Run both jobs to create and populate the data sets.
Use the CICS Explorer® to create a FILE definition for the catalog file.
Use the CICS Explorer to create a FILE definition for the configuration file.

What do I need to know about the listcat command?

For information about these classes, see SMS classes. The TSO/E LISTCAT command invokes the Access Method Services command of the same name. The operand descriptions that follow provide the information required to use these services for normal TSO/E operations.

Which is the listcat command in VSAM file?

What happens when there is no operand in listcat?

The syntax and operand explanations show these unique cases. When LISTCAT is invoked and no operands are specified, the user ID or the prefix specified by the PROFILE command becomes the highest level of entry name qualification. Only those entries associated with the user ID are listed.

What is the history option in listcat used for?

NAME: NAME option is used to list the name and type of the entries. HISTORY: HISTORY option is used to list the information for the above attributes. VOLUME: VOLUME option is used to list the information about the device type and one or more volume serial numbers of the storage volumes where the dataset resides.

How to use LISTCAT command in mainframe?