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4.2 IXFP DDSR
DDSR identifies this command as a DDSR function. DDSR causes the release of
the physical storage space associated with:
•
Expired files
•
A total volume
•
A range of cylinders
•
A specified file
This function ensures that all space releases done on the VSE system (normally
through deletes) result in space releases in the RVA subsystem. Figure 14
shows the syntax of the IXFP DDSR command.
──IXFP─ ─── ───DDSR ──┬ ┬──────────────────────────────── ──┬ ┬─────────── ──────────────────────────────────────────────
││┌┐────────────────────────────── └ ┘──,NOPROMPT
├┤───
┴,unit ──┬ ┬───────────────────
││└┘──(dcyl ──┬ ┬──-dcyl )
││└┘──.ncyl
└┘──,unit(DSN=′ data-set-name′) ────
Figure 14. Syntax of IXFP DDSR Command
4.2.1 Expired Files
DDSR, when specified without any additional parameters, deletes the VTOC
entries and all physical space for all expired nonsecured files residing on VSE
managed RVA devices. These extents are freed up and become part of free
space.
To illustrate, we use two volumes: PATEV1 and PATEV3. The device addresses
of these volumes are 80E and 80F, respectively. To delete all VSE-recognized
expired files, issue the following command:
IXFP DDSR,NOPROMPT
The NOPROMPT parameter is included to prevent decision-type messages from
being issued. Otherwise, decision-type messages are issued for the operator to
verify and confirm (see Figure 15).
AR 0015 1I40I READY
IXFP DDSR
AR+0015 IXFP26D ′ TEST.DATA.1′ HAS EXPIRED ON CUU=80E - REPLY ′ YES′ FOR DELETION
15 YES
AR+0015 IXFP26D ′ TEST.DATA.1′ HAS EXPIRED ON CUU=80F - REPLY ′ YES′ FOR DELETION
15 YES
AR 0015 1I40I READY
Figure 15. Decision-Type Message Issued to Confirm DDSR Expired Files
Chapter 4. IXFP/SnapShot for VSE/ESA 25