What Is Compressed File

Summarize the use of compressed files and files in Linux, compressed files and file is the most common in Linux, a kind of operation, familiar with this part of the skills are also necessary, generally our common commands are: tar, unzip, bunzip2 and so on, How to use the right is also need to master a knowledge focus, the following we divided into two parts to the compressed file and decompression file description. A, decompression small full tar-i or BUNZIP2 command can be decompressed. bz2 file tar xvfj example.tar ...

Zziplib is a read tool for zip compressed files. It uses zlib technology to support the compression algorithm free of charge, can easily extract data from a compressed file. Applications can bundle multiple files into a single zip archive and access them. It supports transparent access to files, both real and compressed, with the same file path, and compressed files can be used in a common subdirectory location. Zziplib 0.13.61 This version of the build script to better support non-non-gnu-ld back-end export symbols. Software Letter ...

Patool is a portable command line compressed File Manager. For the creation, extraction, testing, and listing of various types of compressed files. The Patool advantage is that it can simply process the archive without having to memorize a large number of programs and options, and the archive format is an extension of the file (1) program as the archive file. Patool supported formats include: 7z (. 7z), Aces (. Aces), ALZip (. Alz), AR (. a), ARC (. arc), ARJ (. ARJ), BZIP2 (. bz2 ...).

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The .htaccess file allows us to modify some server settings for a particular directory and its subdirectories. Although this type of configuration is best handled in the section of the server's own configuration file, sometimes we do not have permission to access this configuration file at all, especially when We are on a shared hosting host, and most shared hosting providers only allow us to change server behavior in .htaccess. .htaccess file is a simple text file, note the "." before the file name is very important, we can use your favorite text editor ...

In addition to the "normal" file, HDFs introduces a number of specific file types (such as Sequencefile, Mapfile, Setfile, Arrayfile, and bloommapfile) that provide richer functionality and typically simplify data processing. Sequencefile provides a persistent data structure for binary key/value pairs. Here, the different instances of the key and value must represent the same Java class, but the size can be different. Similar to other Hadoop files, Sequencefil ...

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Aiming at the problem of low storage efficiency of small and medium files in cloud storage system based on HDFS, the paper designs a scheme of small and medium file in cloud storage System with sequential file technology. Using multidimensional attribute decision theory, the scheme by combining the indexes of reading file time, merging file time and saving memory space, we get the best way of merging small files, and can achieve the balance between the time consumed and the memory space saved; The system load forecasting algorithm based on AHP is designed to predict the system load. To achieve the goal of load balancing, the use of sequential file technology to merge small files. Experimental results show that ...

File compression has two main benefits, one is to reduce the space occupied by storage files, the other is to speed up the data transmission. In the context of Hadoop's big data, these two points are particularly important, so let me now look at the file compression in Hadoop. Hadoop supports a wide variety of compression formats, we look at a table: Deflate is also using the LZ77 algorithm and Huffman coding (Huffman http://www.aliyun.com/zixun/aggregation/1552.html ...

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