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Abstract
IBM i 7.5 and IBM i 7.4 add options to Save commands and APIs for Tape compression.
Content
Data compression in the software for saves to tape devices includes support for most existing Save and Restore commands and APIs that support save file and optical compression today. All existing software compression options (such as *LOW, *MEDIUM, *HIGH, and *ZLIB) are supported. The ZLIB algorithm automatically uses the on-chip Nest Accelerator (NX) GZIP when the function runs in Power10 compatibility mode on a Power10 processor. Therefore, ZLIB is faster and less CPU-intensive than the other compression options.
There is no change in the use of Restore processing. The Restore process automatically determines the compression that was used.
The support extends to all currently supported tape devices, as well as virtual tape.
Here is a list of the Save commands that support tape compression:
- SAV
- SAVCFG
- SAVCHGOBJ
- SAVDLO
- SAVLIB
- SAVOBJ
- SAVSECDTA
- SAVSYS
- SAVSYSINF
- Save Object List (QSRSAVO)
- Save Object (QsrSave)
- Save to Application (QaneSava)
- CL Command Finder to search for Save commands
- API Finder to search for Save APIs
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Document Information
Modified date:
10 October 2023
UID
ibm17048696