- Block-length (blklgth): Block length is used to specify the average block length in bytes. ...
- Record length (reclgth): Record length is used to specify the average record length in bytes. ...
- Primary Qty (primary-qty): ...
- Secondary Qty (secondary-qty): ...
- Directory: ...
- RLSE: ...
- CONTIG: ...
- MXIG:
What is the use of space parameter in DD statement?
The SPACE parameter specifies only the required subparameters: the type of allocation and a primary quantity. It requests that the system allocate 10 cylinders . The DD statement defines a new partitioned data set.
What is space parameter in JCL?
SPACE Parameter in JCL is an Optional Keyword parameter that indicates the OS, the amount of memory allocation needed for a dataset while creating it and indicates the allocation units that the requested memory to be provided in. ... Instruct the system on the specific tracks that needs to be allocated to a data set.
What is PDS in mainframe?
A partitioned data set (PDS) is a data set containing multiple members, each of which holds a separate sub-data set, similar to a directory in other types of file systems. ... Once a member is located, the data stored in that member are handled in the same manner as a PS (sequential) data set.
How do you override a space parameter in JCL?
When OVERRIDE SPACE data class attribute takes the value ‘YES’, the JCL SPACE parameters are replaced with the data class SPACE related attributes. For Non-VSAM data sets, the following data class attributes are used to override the JCL space specifications: AVGREC . AVGVAL .
What is Sysda JCL?
Following is the syntax: UNIT=DASD | SYSDA. Where DASD stands for Direct Access Storage Device and SYSDA stands for System Direct Access and refers to the next available disk storage device.
What is time parameter JCL?
TIME Parameter in JCL is a Keyword parameter which indicates the Processor Time required to execute the job/step in a JCL . This can be used either in JOB or in STEP or in both the places.
What is class parameter JCL?
JCL CLASS Parameter is a Keyword Parameter and CLASS Parameter defines an input CLASS in of a schedule JOB. It is used to tell the operating system about the nature of the job which we are submitting.
Which DD parameters are required?
DD statement has two positional parameters. Specifies no space allocation and no disposition processing. DYNAM parameter to provide the compatibility with previous system.
What is Avgrec JCL?
Purpose. Use the AVGREC parameter when you define a new data set to specify that: The units of allocation requested for storage space are records . The primary and secondary space quantity specified on the SPACE parameter represents units, thousands, or millions of records.
What are the three methods of entering TSO commands?
You can enter most TSO commands, CLISTs, and REXX EXECs from all three panel types: data entry; menu; and scrollable data display .
What is a member in mainframe?
A member selection list, also called a member list, is initially an alphabetic list of the members of an ISPF library or TSO partitioned data set . ... In the Type of Selection column, Single means that ISPF processes only the line command that is the closest to the top of the list, ignoring all others.
What is a VSAM file?
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.
How do I bypass a particular step in JCL?
COND parameter is JCL can be used to skip a step based on the return code from the previous step or steps of the JCL. 2. This COND parameter can also be used to skip a step based on the return code from a previous step or steps in PROC.
What is DD dummy in JCL?
DD statement IN1 defines a dummy data set . The DCB parameter supplies data control block information not supplied in the program. Without it, the step might be abnormally terminated.
What is JCL override?
JCL/PROC override is useful when a proc parameters, data sets needs to be modified while executing it . Adding parameters, Nullifying the existing parameters or Overriding the parameters of a PROC are the common overrides that can be done via a JOB.
