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89 lines
1.7 KiB
Groff
89 lines
1.7 KiB
Groff
\"
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\" lz4.1: This is a manual page for 'lz4' program. This file is part of the
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\" lz4 <https://code.google.com/p/lz4/> project.
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\"
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\" No hyphenation
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.hy 0
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.nr HY 0
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.TH lz4 "1" "2014-02-27" "lz4" "User Commands"
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.SH NAME
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\fBlz4\fR - Extremely fast compression algorithm
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.SH SYNOPSIS
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.TP 5
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\fBlz4\fR [\fBOPTIONS\fR] [-|INPUT-FILE] <OUTPUT-FILE>
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.SH DESCRIPTION
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.PP
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\fBlz4\fR is an extremely fast lossless compression algorithm. It is based on
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the \fBLZ77\fR family of compression scheme. At the compression speed of 400
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MB/s per core, \fBlz4\fR is also scalable with multi-core CPUs. It features
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an extremely fast decoder, with speed in multiple GB/s per core, typically
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reaching the RAM speed limits on multi-core systems. \fBlz4\fR supports
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following options
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.SH OPTIONS
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.TP
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.B \-1
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fast compression (default)
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.TP
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.B \-9
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high compression
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.TP
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.B \-d
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decompression
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.TP
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.B \-f
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overwrite output without prompting
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.TP
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.B \-h/\-H
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display help/long help and exit
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.TP
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.B \-V
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display Version number and exit
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.TP
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.B \-v
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verbose mode
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.TP
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.B \-q
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suppress warnings; specify twice to suppress errors too
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.TP
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.B \-c
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force write to standard output, even if it is the console
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.TP
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.B \-t
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test compressed file integrity
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.TP
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.B \-z
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force compression
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.TP
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.B \-l
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use Legacy format (useful for Linux Kernel compression)
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.TP
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.B \-B#
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block size [4-7](default : 7)
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B4= 64KB ; B5= 256KB ; B6= 1MB ; B7= 4MB
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.TP
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.B \-BD
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block dependency (improve compression ratio)
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.TP
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.B \-BX
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enable block checksum (default:disabled)
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.TP
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.B \-Sx
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disable stream checksum (default:enabled)
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.TP
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.B \-b
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benchmark file(s)
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.TP
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.B \-i#
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iteration loops [1-9](default : 3), benchmark mode only
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.SH BUGS
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Report bugs at:- https://code.google.com/p/lz4/
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.SH AUTHOR
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Yann Collet
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