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