SIO_DATA_COMPRESSION - UCMD Manager configuration option
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
Method | Syntax | IBM i | UNIX | Windows | z/OS |
|---|---|---|---|---|---|
Command Line, Short Form | -k option[UCMD:,method] | ||||
Command Line, Long Form | -compress option[UCMD:,method] | ||||
Environment Variable | n/a | ||||
Configuration File Keyword | n/a | ||||
STRUCM Parameter | n/a |
Values
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.