Description

The SIO_DATA_COMPRESSION option specifies whether or not the standard file data transmitted across the network should be compressed.

It also can specify, optionally, the compression method to use.

Usage

option is the specification for whether or not data should be compressed.

Valid values for option are:

yes
Data compression is required. All network data transfers for the standard file are compressed regardless of UCMD Server's DATA_COMPRESSION option.
no
Data compression is not required. It still is possible for UCMD Server to request data compression {via its DATA_COMPRESSION option).

Default is no.

method is the compression method to be used

Valid values for method are:

zlib
Data will be compressed using ZLIB compression algorithm. This method usually results in a very high compression rate, but tends to be somewhat CPU-intensive. ZLIB is recommended in environments where controlling a process's CPU usage is not necessarily a priority.
hasp
Data will be compressed using the HASP compression algorithm. This method is less CPU-intensive than the ZLIB method, and is recommended in environments where controlling CPU usage is a priority. With HASP, the compression rate - while still very good - tends to be a little less than what is possible with the ZLIB method.

Default is zlib.