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2025-09-24 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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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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