Steps for creating a cataloged procedure for a temporary file system

Perform the following steps to create a cataloged procedure for a temporary file system.

Set up a FILESYSTYPE statement in BPXPRMxx. It must have the name of the procedure on the ASNAME operand.
Example: For cataloged procedure XXXXXX, the FILESYSTYPE statement would be:
```
FILESYSTYPE TYPE(TFS)
            ENTRYPOINT(BPXTFS)
            ASNAME(XXXXXX)
```
_______________________________________________________________
Create the cataloged procedure XXXXXX in SYS1.PROCLIB. It must contain the following statement:
```
EXEC PGM=BPXVCLNY
```
_______________________________________________________________

When you are done, you have created a cataloged procedure for a temporary file system.

Some tips:

A temporary file system uses private storage for the file system in memory. If you run it in the kernel, then you might run out of virtual memory. However, by starting multiple temporary file systems in colonies, you can create many temporary files or very large temporary files (about 1.5 gigabytes per temporary file system colony).
Code REGION=0K, REGIONS=0M, or a specific MEMLIMIT value on the EXEC statement in the TFS colony cataloged procedure. Doing so allows the TFS address space to address storage above the bar for the TFS file system. For more information about the MEMLIMIT parameter, see z/OS MVS Programming: Extended Addressability Guide