What is the default disp parameter in JCL?
When any of the sub-parameters of DISP are not specified, the default values are as follows: status : NEW is the default value. normal-disposition : If status is NEW, default normal-disposition is DELETE, else it is KEEP. abnormal-disposition : Same as normal disposition.
What is the function of DD DISP parameter?
Use the DISP parameter to describe the status of a data set to the system and tell the system what to do with the data set after termination of the step or job. You can specify one disposition for normal termination and another for abnormal termination.
What is disp SHR in JCL?
DISP=SHR means dataset already available. If one job updating the dataset then at same time other jobs can only read the dataset, it will not allow the more than one job update the dataset. SHR will allow multiple jobs to read dataset at same time.
What is disp =( new Catlg delete?
DISP=(NEW,CATLG,CATLG) should rarely be used. This tells the system to create a new dataset and catalog it even if the step abends. More often DISP=(NEW,CATLG,DELETE) will be used for new file creation. DISP=(OLD,DELETE,DELETE) is used for an existing file that is to be deleted regardless of the outcome of the step.
What are the DISP parameters?
DISP parameter. Use the DISP parameter to describe the status of a data set to the system and tell the system what to do with the data set after termination of the step or job. You can specify one disposition for normal termination and another for abnormal termination.
Which term in DISP parameter is normal disposition?
ND – It denotes Normal Disposition. The allowed values are – CATLG, UNCATLG, KEEP, PASS and DELETE. If a step terminates normally (without any ABEND), then we have to code that what needs to be done with that dataset.
What is difference between disp SHR and DISP old?
DISP=OLD denotes exclusive control of the dataset; DISP=SHR means there is no exclusivity.
What is the difference between disp old and DISP new?
disp=old refers to dataset already created. disp=new refers to dataset to be created at end of this stepdisp=mod refers some data contents are added at end of dataset ifdataset already present or a new dataset is created if it is not already present.
What are utilities in JCL?
JCL Utilities are pre-written programs, widely used in mainframe to achieve day-to-day requirements, organizing and maintaining data. It is used to reorganize, change or compare data at the data set or record level. These utilities allow to manipulate data sets, which are provided as input to the programs.
What is difference between old and mod in DISP in JCL?
DISP=OLD denotes exclusive control of the dataset; DISP=MOD is used when the dataset can be extended, ie, you can add records at the end of an existing dataset.
What is the difference between Steplib and Jcllib?
STEPLIB is defined after an EXEC and applies only to that step. It also contains the load libraries to be searched for the step. JCLLIB is defined at the start of the job before any EXEC and contains the procedure (JCL) libraries to be searched for any procedures (that is, anything not EXEC PGM=) or INCLUDE members.
Can we use DISP SHR on output file?
If you copy an file from one to another with DISP=SHR , the output file will be having the all the records of Input file where the previous contents of the output file will be overridden.