Compressible Data Offset option
The Compressible Data Offset option enables you to indicate the location within the records where compression begins for a data set.
If you set this option to zero, DATA ACCELERATOR Compression compresses all data to the right of the key in the records. DATA ACCELERATOR Compression automatically excludes all key fields from compression.
If you want a field to the right of the key to remain uncompressed, change the value of the Compressible Data Offset option to the number of the first byte in the record (relative to zero) where you want compression to begin.
When you change this value, only newly written records have this offset. When the data set is reloaded, all records have the specified offset.
Use the Compressible Data Offset option sparingly because the larger the offset, the less DATA ACCELERATOR Compression is able to compress the records in a data set.
Parameter | Description |
|---|---|
Components | VSAM component |
REGISET Entries | Data set entry |
ISPF Panel | Compressible data offset field |
Batch Utility | OFFSET |
Global Commands | not applicable |
JOB Step Overrides | not applicable |
Values | Use a value from 0 to 9999. |
Default | 0 |
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