DATA_COMPRESSION - UCMD Manager configuration option

Owned by Stonebranch (Deactivated)
Feb 06, 2023
1 min read

Description

The DATA_COMPRESSION option specifies whether or not the data in standard I/O file transmissions across the network should be compressed.

Optionally, it also can specify the compression method to use.

Usage

Method

Syntax

IBM i

UNIX

Windows

z/OS

Command Line, Short Form

-k option[,method]


(tick)

(tick)

(tick)

Command Line, Long Form

-compress option[,method]


(tick)

(tick)

(tick)

Environment Variable

UCMDCOMPRESS=option[,method]

(tick)

(tick)

(tick)


Configuration File Keyword

compress option[,method]

(tick)

(tick)

(tick)

(tick)

STRUCM Parameter

COMPRESS(*option)

[CMPRSMTH(,*method) ]

(tick)




Values

option is either of the following values:

  • yes
    Data compression is required. All data in standard I/O file transmissions is compressed regardless of the UCMD Server DATA_COMPRESSION option value.
  • no
    Data compression is not required. However, data compression still can be requested via the UCMD Server DATA_COMPRESSION option.

Default is no.


method is either of the following values:

  • zlib
    Data is compressed using ZLIB compression algorithm. This method usually results in a very high compression rate, but tends to be somewhat CPU-intensive. It is recommended in environments where controlling a process's CPU usage is not necessarily a priority.
  • hasp
    Data is compressed using the HASP compression algorithm. This method is less CPU-intensive than the ZLIB method. It 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.

Default is zlib.