| lz4(1) |
User Commands |
lz4(1) |
lz4 - Extremely fast compression algorithm
- lz4 [OPTIONS] [-|INPUT-FILE] <OUTPUT-FILE>
-
lz4 is an extremely fast lossless compression algorithm. It is based on
the LZ77 family of compression scheme. At the compression speed of 400
MB/s per core, lz4 is also scalable with multi-core CPUs. It features
an extremely fast decoder, with speed in multiple GB/s per core, typically
reaching the RAM speed limits on multi-core systems. lz4 supports
following options
- -1
-
fast compression (default)
- -9
-
high compression
- -d
-
decompression
- -f
-
overwrite output without prompting
- -h/-H
-
display help/long help and exit
- -V
-
display Version number and exit
- -v
-
verbose mode
- -q
-
suppress warnings; specify twice to suppress errors too
- -c
-
force write to standard output, even if it is the console
- -t
-
test compressed file integrity
- -z
-
force compression
- -l
-
use Legacy format (useful for Linux Kernel compression)
- -B#
-
block size [4-7](default : 7)
B4= 64KB ; B5= 256KB ; B6= 1MB ; B7= 4MB
- -BD
-
block dependency (improve compression ratio)
- -BX
-
enable block checksum (default:disabled)
- -Sx
-
disable stream checksum (default:enabled)
- -b
-
benchmark file(s)
- -i#
-
iteration loops [1-9](default : 3), benchmark mode only
Report bugs at:- https://code.google.com/p/lz4/