CCOMPRESS(8)

NAME
ccompress - compress a system savecore image

SYNOPSIS
ccompress [ -s seg_size ] [ -P processes ] [ -o outdir ] file

DESCRIPTION
ccompress is used to convert a vmcore named file to the savecore compressed format. The command is written to run in parallel; by default it will use all on-line engines. Usually a file with ".ZZ" appended to the name is created in the current directory, -o may be specified to cause this file to be created in a different directory. Crash is capable of reading the ".ZZ" format of core image "on-the-fly".

The option -P specifies how many parallel processes should be used for compressing the input. The best performance is achieved if the number of compressor processes equals the number of on-line engines, which is the default behaviour.

seg_size specifies how much data (in 1k byte increments) is compressed as a block. The default of 8K provides good average compression; the seg_size is generally only specified by ccompress wizards.

SEE ALSO
savecore(8), crash(8), unccompress(8).