Linux Compression

Currently used in Hadoop more than four compression formats lzo, gzip, snappy, bzip2, the author based on practical experience to introduce the advantages and disadvantages of these four compression formats and application scenarios, so that we in practice according to the actual situation of choice Different compression formats. 1 gzip compression Advantages: compression ratio is relatively high, and the compression / decompression speed is faster; hadoop itself support, in the application of gzip format file processing and direct processing of the same text; have hadoop native library; most of the li ...

BZIP2 is a lossless compression software based on Burrows-wheeler transform, the compression effect is better than the traditional lz77/lz78 compression algorithm. It is provided free of charge with high quality data compression capability. BZIP2 use of advanced compression technology, can compress files to 10% to 15%, compression speed and decompression efficiency are very high! Supports most compression formats now, including Tar.gzip, and so on. GZ is the compressed file in the UNIX system, the GNU version of Zip, and the function is as compressed as WinRAR ...

Using Lzo compression algorithms in Hadoop reduces the size of the data and the disk read and write time of the data, and Lzo is based on block chunking so that he allows the data to be decomposed into chunk, which is handled in parallel by Hadoop. 　　This feature allows Lzo to become a very handy compression format for Hadoop. Lzo itself is not splitable, so when the data is in text format, the data compressed using Lzo as the job input is a file as a map. But s ...

Function Description:. bz2 file compression program. Syntax: bzip2&http://www.aliyun.com/zixun/aggregation/37954.html >nbsp; [-cdfhklstvvz] [--repetitive-best] [--repetitive-fast] [-Compression level] [File to compress] Supplemental Note: BZIP2 adopts the new compression algorithm, the compression effect is more than the traditional ...

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; I have written an article before, To tell the Linux Apache server or virtual host of WordPress open gzip compression, and open the actual effect of compression can also be seen through the article in the picture. However, although the Linux server is more worthy of recommendation, and Windows Server platform is also thinking 2008 and 20 ...

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Usage of tar volume compression and merging in Linux? For example per volume 500M tar split-volume compression: Tar Cvzpf-somedir | Split-d-B 500m (-D is not a split option, is the shell option to indicate the output of the tar command as a split input) tar multi-volume Merge: Cat x > mytarfile.tar.gz

Compress,uncompress This command to compress or decompress data. Gzip,gunzip This command is used to compress or extract files, where gzip is a compression and decompression command that is used frequently in Linux systems and is easy to use. The rpm RPM command is used to start the RPM package management operation. The Tar tar command is used to start the File Packager program. Unzip this command is used to decompress files with the. zip extension, that is, you can unzip Windows under Linux with WinZip compression ...

Function Description: Compress or extract files. Syntax: compress&http://www.aliyun.com/zixun/aggregation/37954.html >nbsp; [-CDFRVV] [B < compression efficiency] [File or directory ...] Add: Compress is a long history of the compression program, the file after it compressed, its name will be more ". The extension of Z. ...