Difference bw PROCLIB & JCLLIB

sunojsm · New User Joined: 21 Jun 2004 Posts: 33 Location: Andorra

Hi all,

some questions

1.Diff bwtween JCLLIB and PROCLIB
2.Is there a way in JCL to identify the oldest GDG version assuming we don't know how many generations will exist at any given time?

bye

priya · Posted: Fri Mar 25, 2005 8:39 pm

mmwife · Super Moderator Joined: 30 May 2003 Posts: 1592

JCLLIB is a JCL stmt that allows the user to specify his own proclibs and/or specify the order in which they're searched to find the PROC(s) or INCLUDE libraries invoked in the JCL. You can use the ORDER clause to do this. You can specify private (user) or system libraries.

jinal_mca · Posted: Sat Jan 20, 2007 2:09 pm

hi dear

JCLlib is a library which is having catloged procedures which are defined by the users.

So bfor calling any catloged procedure u have to define JCLLIB path.

syntax is

//NAME JCLLIB ORDER='PATH'

CORRECT M IF I M WRONG

THNX

dick scherrer · Posted: Sun Jan 21, 2007 7:42 am

Hello,

For my $.02, i'd describe proclib and jcllib as follows:

PROCLIBs are Procedure Libraries. These may be system or user PROCLIBs. Typically, a site's PROCs are stored in one or more user-defined PROCLIB(s) - not a system PROCLIB.

In addition to the JCLLIB statement that allows library specification, "jcllib"s are one or more places to store execution jcl (production, test, someone's "own" personal library, etc). Many sites also have some jcllib(s) that are where scheduling software retrieves members for running schedlued jobs.

Also, to identify the oldest version in a gdg via jcl, you could run an IDCAMS step with a LISTCAT. Specifying -1 will get the previoius version (if one exists) but that may not be the oldest version.

Sahoo · New User Joined: 08 Jun 2006 Posts: 53

JCLLIB is a JCl keyword used for defining the Catalogued procedure

There is no such reserved word PROCLIB. Generally PROCLIB is used as label in the JCLLIB statement

//PROCLIB JCLLIB ORDER=DATASET NAME

Regarding getting the versions of GDG use IDCAMS LISTCAT command

jinal_mca · Posted: Tue Jan 23, 2007 3:23 pm

In JCLLIB we can define order stmt where u can define no of libraries which are seperated by comma.

so that system will search for that particular procedure in the sequence as specified in the order stmt.

PROCLIB refers to a Procedure Library. It is a dataset or a set of datasets that contain cataloged procedures (PROCs) written in Job Control Language (JCL). These procedures are predefined sets of JCL statements that can be included in jobs to perform repetitive tasks or set up common environments, thereby saving time and ensuring consistency.

Key Points about PROCLIB:
Cataloged Procedures:

These are reusable JCL code blocks stored in PROCLIB datasets.
They allow for standardization and reuse of JCL, making job management more efficient.
Dataset Definition:

PROCLIB is defined as one or more partitioned datasets (PDS) or partitioned dataset extended (PDSE) on the mainframe.
These datasets are specified in the JES (Job Entry Subsystem) initialization parameters, often in the JES2 or JES3 subsystem initialization statements.
Usage in Jobs:

When submitting a job, you can invoke a cataloged procedure from the PROCLIB by using the EXEC statement in your JCL.
For example, //MYPROC EXEC PROCNAME tells the system to use the procedure named PROCNAME from the PROCLIB.
Advantages:

Reusability: Procedures can be reused across multiple jobs, reducing redundancy.
Consistency: Ensures that the same steps are followed every time the procedure is executed.
Maintainability: Easier to update a single procedure in the PROCLIB rather than modifying multiple JCL scripts.

cya