roidba的最爱，lz4压缩工具，备份恢复再也不用等几个小时了啦

压缩比，效率都很高，至于怎么用，明天发文章。

1. 下载

http://rpmfind.net/

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

http://rpmfind.net/

# 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)