| How to Regain Unused Space in a PDS | ||
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| How to Regain Unused Space in a PDS | ||
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Table of Contents
The SQUEEZE procedure uses IBM's IEBCOPY utility, which compresses members to new contiguous locations so that space previously held by deleted members is combined into a contiguous space. This space can
then be used to add new members to the PDS. Optionally, it can be released, in whole or in part, to other users of the disk volume. If you will not be adding new members or updating members, you should release unused space so that you do not get billed
for space you do not need.
Use the following JCL to squeeze a partitioned data set and release the unused space:
Figure 10. JCL for Using the SQUEEZE Procedure
//jobnameJOB (,,time,lines),'your name',CLASS=class/*ROUTE PRINTnode.location// EXEC SQUEEZE,DSN='data.set.name',RLSE=RLSE,ALLOC=CYL
In the example in Figure 1, data.set.name is the name of the cataloged data set to be compressed. RLSE=RLSE and ALLOC=CYL are optional parameters.
When RLSE=RLSE is specified on the EXEC statement, OS/390 allocation/de-allocation releases unused space after IEBCOPY has finished. Space thus released becomes available for other users.
Coding RLSE=RLSE and ALLOC=CYL requests that all unused cylinders be released except for unused space within the last cylinder. This unused space will be retained as part of the data set, which leaves
some space for future growth.
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