Shulou(Shulou.com)06/01 Report--

Compression ratio, efficiency are very high, as for how to use, post tomorrow.

1. download

Http://rpmfind.net/

Search input: lz4

Download

Extras Testing Packages for Enterprise Linux 6 for x86_64

Lz4-1.7.5-1.el6.x86_64.rpm

two。 Installation

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

-hhand Mutual 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)

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