1\" 2\" lz4.1: This is a manual page for 'lz4' program. This file is part of the 3\" lz4 <https://code.google.com/p/lz4/> project. 4\" 5 6\" No hyphenation 7.hy 0 8.nr HY 0 9 10.TH lz4 "1" "2014-02-27" "lz4" "User Commands" 11.SH NAME 12\fBlz4\fR - Extremely fast compression algorithm 13 14.SH SYNOPSIS 15.TP 5 16\fBlz4\fR [\fBOPTIONS\fR] [-|INPUT-FILE] <OUTPUT-FILE> 17 18.SH DESCRIPTION 19.PP 20\fBlz4\fR is an extremely fast lossless compression algorithm. It is based on 21the \fBLZ77\fR family of compression scheme. At the compression speed of 400 22MB/s per core, \fBlz4\fR is also scalable with multi-core CPUs. It features 23an extremely fast decoder, with speed in multiple GB/s per core, typically 24reaching the RAM speed limits on multi-core systems. \fBlz4\fR supports 25following options 26 27.SH OPTIONS 28.TP 29.B \-1 30 fast compression (default) 31.TP 32.B \-9 33 high compression 34.TP 35.B \-d 36 decompression 37.TP 38.B \-f 39 overwrite output without prompting 40.TP 41.B \-h/\-H 42 display help/long help and exit 43.TP 44.B \-V 45 display Version number and exit 46.TP 47.B \-v 48 verbose mode 49.TP 50.B \-q 51 suppress warnings; specify twice to suppress errors too 52.TP 53.B \-c 54 force write to standard output, even if it is the console 55.TP 56.B \-t 57 test compressed file integrity 58.TP 59.B \-z 60 force compression 61.TP 62.B \-l 63 use Legacy format (useful for Linux Kernel compression) 64.TP 65.B \-B# 66 block size [4-7](default : 7) 67 B4= 64KB ; B5= 256KB ; B6= 1MB ; B7= 4MB 68.TP 69.B \-BD 70 block dependency (improve compression ratio) 71.TP 72.B \-BX 73 enable block checksum (default:disabled) 74.TP 75.B \-Sx 76 disable stream checksum (default:enabled) 77.TP 78.B \-b 79 benchmark file(s) 80.TP 81.B \-i# 82 iteration loops [1-9](default : 3), benchmark mode only 83 84.SH BUGS 85Report bugs at:- https://code.google.com/p/lz4/ 86 87.SH AUTHOR 88Yann Collet 89