压缩比，效率都很高，至于怎么用，明天发文章。
1. 下载
Search 输入：lz4
Download
Extras Testing Packages for Enterprise Linux 6 for x86_64
lz4-1.7.5-1.el6.x86_64.rpm
2. 安装
# rpm -ivh lz4-1.7.5-1.el6.x86_64.rpm
# rpm -qa|grep lz4
lz4-1.7.5-1.el6.x86_64
# lz4 --help
*** LZ4 command line interface 64-bits v1.7.5, by Yann Collet ***
Usage :
lz4 [arg] [input] [output]
input : a filename
with no FILE, or when FILE is - or stdin, read standard input
Arguments :
-1 : Fast compression (default)
-9 : High compression
-d : decompression (default for .lz4 extension)
-z : force compression
-f : overwrite output without prompting
-k : preserve source files(s) (default)
--rm : remove source file(s) after successful de/compression
-h/-H : display help/long help and exit
Advanced arguments :
-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
-m : multiple input files (implies automatic output filenames)
-r : operate recursively on directories (sets also -m)
-l : compress using Legacy format (Linux kernel compression)
-B# : Block size [4-7] (default : 7)
-BD : Block dependency (improve compression ratio)
--no-frame-crc : disable stream checksum (default:enabled)
--content-size : compressed frame includes original size (default:not present)
--[no-]sparse : sparse mode (default:enabled on file, disabled on stdout)
Benchmark arguments :
-b# : benchmark file(s), using # compression level (default : 1)
-e# : test all compression levels from -bX to # (default : 1)
-i# : minimum evaluation time in seconds (default : 3s)
-B# : cut file into independent blocks of size # bytes [32+]
or predefined block size [4-7] (default: 7)