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SQL Server SP2 brings us the vardecimal feature, when a new storage format--vardecimal was introduced for decimail and numeric data types. The vardecimal storage format allows storage of the decimal and numeric data types as a variable-length column. This feature allows the originally fixed-length decimal data to be stored in a variable-length format in the data file, which is said to save 30% of the space for a typical data warehouse, and SQL Server 2008 further enhances the data
In Linux, there are many compression commands. Using these compression commands, you can easily download large files from the network. At the same time, we know that the Linux File Extension has no special significance. However, because there are many compression commands in Linux, in order to facilitate memory, some special naming methods will be performed on th
Address: http://tech.watchstor.com/management-115343.htm Abstract:LZW CompressionAlgorithmIt is a novel compression method created by lemple-Ziv-Welch and named by their names. It is amazing that the string table can be correctly created during compression or decompression. After compression or decompression, the string table is discarded. Tags:LZW
Enable gzip compression for IIS The modern browsers IE6 and Firefox both support the client gzip. That is to say, before the webpage on the server is transmitted, Gzip compression is used before it is transmitted to the client. After receiving the webpage, the client is decompressed and displayed by the browser, in this way, although the CPU usage of some servers and clients is slightly occupied, the bandwi
I have written an article [HTTP protocol details]. This time I will continue to introduce HTTP compression. This document uses Fiddler to view HTTP request and Response. If you are not familiar with this tool, refer to [Fiddler tutorial]. HTTP compression refers to the "text content" compressed and transmitted between the Web server and the browser. HTTP adopts common c
[Nginx] gzip CompressionThere is such a configuration file gzip on # default value: gzip off # enable or disable the gzip module gzip_static off; # nginx's processing module for static files # This module can read pre-compressed gz files, this reduces the CPU resource consumption for gzip compression for each request. After this module is enabled, nginx first checks whether there are files ending with the gz request for static files. If yes, the conte
The main compressed files in Linux are : *.gz *.tar *.tar.gz *.zip *.bz2 *.tar.bz2 The old compression format of. zip, in Windows and Linux, is not compressed text that you can use to install the software pieces . rar files, used in Linux, to install software RAR for Linux can be used. . gz files can compress and decompress directly in Linux *.gz file Compression
1. Gzip, can bzip2 directly compress the directory? No2. Please write quickly, using gzip and bzip2 to compress and decompress a file command. Compressed gzip 1.txt; Decompression gzip-d 1.txt.gzbZIP 1.txt; unzip bzip-d 1.txt.bz23. When the tar is packaged, how do you want to exclude multiple files or directories? TAR-CVF File.tar--exclude.a.txt--exclude b.txt 123/4. Please experiment, if not add "-" is correct, such as tar zcvf 1.tar.gz 1.txt 2.txt?That's right5. How to package and unpack with
1. The principle of file compression: At present, the computer system is used bytes units to measure, but, in fact, the smallest unit of measurement of computers should be bits, in addition, we also know 1byte=8bits. That is, each byte will have 8 spaces, and each space can be 0 or 1, so if we want to record 1 This number, then we will waste another 7 spaces. Compression technology is the use of some algori
Linux has a lot of commands to achieve file compression, but also the existence of various extensions of compressed files. Previously saw these commands and parameters, really do not know which to choose, so the system of learning a bit today, also summed up, I hope to see this blog to help the students.The article mainly has three parts, what is the file compression, c
-defined tree based on the frequency of occurrence, and generates a user-defined code based on the user-defined tree. Scan the file again, read 8 bits each time, match the encoding according to the "character-encoding" table, save the encoding to the compressed file, and store the encoding table. During decompression, read the encoding table, read the encoding matching encoding table, find the corresponding characters, store the files, and decompress the files. Iii. GeneralUMLCollaboration Diagr
IntroducedThe GCC (Google Closure Compiler) is a JS code compression compilation tool released by Google. It can parse the JS code, remove the unwanted code (dead), and rewrite it, and then compress.Three types of compression modesGCC offers three compression modes:1）Whitespace only2）Simple3）AdvancedLet's take this simple code as an example.function sayHello(name
Preface The first two articles talk about Aapche's access control and log analysis, this article will focus on Apache web optimization, such as: page compression, Web page caching.In the process of using Aapche as a Web server, we have to optimize the configuration of the Aapche server for better performance, so we need the configuration optimization for the Aapche server! Web page compression
Publish an efficient JavaScript analysis, compression tool JavaScript analyser First, send a script compression example to show the JSA syntax compression and optimization features. Copy Code code as follows: try { XXXX (); } catch (e) { YYYY (); Function F1 () { } } finally { Zzzz (); } function F2 (var1) { var var2 = 2; var var3 =
When you hear this word about Oracle Database compression, you must think of saving hard disk space. Yes, it is used to do this, but extending it out not only saves hard disk space, it can also save bandwidth and memory usage (cpu consumption is slightly reduced because more computing value operations are required, but in most environments the cpu is idle, so you can ignore it ).Basic compression is provide
Summary of five commonly used picture formats and whether they have data compressionDisclaimer: Reference Please specify source http://blog.csdn.net/lg1259156776/Description: This article focuses on the five most common and most commonly used image formats: bmp,png,jpeg,jpeg200, and GIF. The first step before image processing related applications is to be able to read these image files, although many development tool support libraries such as OPENCV have helped to save the hassle of these effort
SummaryIf your applicationProgramYou are lucky to have never used compression. For another developer who uses compression, the good news is that. NET 2.0 now provides two classes to handle compression and decompression issues. This article is intended to discuss when and how to use these useful tools. Introduction The new namespace in. NET Framework 2.0 is sy
1. Http compression Overview HTTP compression is used to transfer compressed text content between web servers and browsers. HTTP compression adopts common CompressionAlgorithmSuch as gzip to compress HTML, JavaScript, or CSS files. The biggest advantage of compression is that it reduces the amount of data transmitted
Linux File compression and Packaging Commands First, we need to clarify two concepts: Packaging and compression.Packaging refers to converting a large number of files or directories into a total file;Compression is to convert a large file into a small file through some compression algorithms.Why do we need to differentiate these two concepts? This is because many
Benefits of Compression Compression is an Oracle feature that is more suitable for Data Warehouse Environments. The benefits of compression include: 1. Saving storage space makes sense for massive data volumes. 2. the query performance will be improved (not absolutely) Because physical I/O is reduced and the hit rate of data blocks in the memory is increased. Dis
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