Database Administrator's Guide

CMPREC_TYPE

CMPREC_TYPE < TYPE >

Specifies the type of data compression type for files. Several algorithms are supported.

CMPREC_TYPE < ZLIB | RLE | USER >

The following compression types are currently supported:

ZLIB - General purpose compression from the zlib compression library.

Note: the ZLIB compression algorithm will impact performance. A Best Practice is to consider using RLE compression. It's quick and easy to test both ZLIB and RLE, but in most cases we have found RLE to be the better combination of reduced space and minimal performance overhead.

RLE - A fast proprietary run length encoding optimized for data that is null character, space or zero (0) padded (sparse data files).
USER - A user defined compression algorithm, requiring an associated .DLL (or shared object)

With USER compression, these additional keywords must be entered in the configuration file in the order shown below, and a DLL name is required.

CMPREC_TYPE < USER >

CMPREC_VERSION < a number >= 1 >

CMPREC_DLL < name of DLL >