Specifies the specific ZLIB implementation package to use for block-level compression (BLC). If the ISAL package is not installed or an error is encountered, IPPZLIB is used instead. If the IPPZLIB package is not installed or an error is encountered, ZLIB is used.
Field Group
Compression
Valid Settings
| Setting | Description |
|---|---|
| ZLIB | The standard ZLIB library used for compression and uncompression. |
| IPPZLIB | The Intel IPP ZLIB implementation. This is the default. |
| ISAL | The Intel Intelligent Storage Acceleration Library implementation. |
Default
IPPZLIB
Changes Take Effect
After the DBS Control Record has been written. Changed setting applies to new data added to tables. Compression for existing data is not changed until that data is modified.
Usage Notes
BLC enables data compression at the data block (DB) level of the file system. Compression reduces the amount of storage required for a given amount of data. The BlockLevelCompression field of DBS Control enables and disables BLC.
Data compressed with IPPZLIB can be uncompressed with either IPPZLIB or standard ZLIB.
Related Information
| For more information on... | See... |
|---|---|
| BlockLevelCompression field | BlockLevelCompression. |
| COMPRESS and UNCOMPRESS commands | Ferret Utility (ferret). |
| BLOCKCOMPRESSION query band | Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144. |