Linux tar is used to compress files after a certain date. To facilitate Incremental backup of server data, appropriate tar parameters can be used to regularly package Java code tar cvf backtup.tar -- newer "2012-10-01 00:00:00" under cron" backup/tar czvf backtup.tar.gz -- newer "2012-10-01 00:00:00" backup/For example, the preceding command can only compress the file www.2cto.com, which is created on a dat
Lzma c # package and compress Unity3d instances in Multiple folders with UPK,
In the previous article, lzma c # SDK subthread compression and decompression Unity3d instances demonstrate how to use lzma c # SDK to compress and decompress files, it is mentioned that you can Package Multiple folders into UPK and then LZMA for compression. In this example, you can learn in detail.
After the example is r
Compress a DVD by yourself
Nowadays, in the audio and video markets across regions, a type of disc named compressed DVD is becoming popular. A 30-episode TV series can be played on a conventional DVD player with only three DVDs. So many people think that there is a new DVD format. Some media did not conduct any in-depth research and made some false reports. What is the form of a DVD?
Note: there is also a type of computer-attached DVD with a higher co
/// /// Serialize and compress the DataSet object/// /// Public static void datasetserializercompression (Dataset ds, string filepath){Iformatter formatter = new binaryformatter (); // defines binaryformatter to serialize the DataSet objectMemorystream MS = new memorystream (); // creates a memory stream objectFormatter. serialize (MS, DS); // serialize the DataSet object to the memory streamByte [] buffer = Ms. toarray (); // write the memory stream
additional header, which cannot be compressed. when Bzip2 is used, an additional 36-byte header is required. in fact, Bzip2 can be used to compress a 12892-byte source file to 2563 bytes, with a compression rate of about 75%. another test is to compress 730 bytes to 429 bytes, And the last test is 174 bytes to 161 bytes. obviously, any compression requires additional space available.
Below we write data in
Copyright. If you need to reprint, please keep the author and source information: http://blog.csdn.net/jmppok/article/details/38121115
During network transmission, the most important concern is the transmission efficiency. The most effective way to improve transmission efficiency is to compress the transmitted data. However, it takes a certain amount of time to compress data. Is it possible to improve effi
combine multiple files into one ZIP file. Each file is compressed separately, and all files are stored at the end of the ZIP file. This attribute indicates that the ZIP file supports splitting at the file boundary. Each part contains one or more files in the zip compressed file.
Hadoop CompressionAlgorithmAdvantages and disadvantages
When considering how to compress data that will be processed by mapreduce, it is important to consider whether the
");for(int i = 0 ; i
The poor man scratched his head and fell into meditation. When the sky was full of flying chips on the desktop, the poor road suddenly found that the gray wolf was actually streaking naked. Is it inappropriate for the SDK to identify it as a child and it should be handled by cavalry. As a result, desert.jpg files are suitable for all users (see figure 3 ). Facts have proved that we once again underestimated the shameless nature of mosaic, and this time the vicissitudes of t
7-Zip Introduction
7-Zip is a compression software that claims to have the highest compression ratio today. It not only supports the unique 7z file format, but also supports a variety of other compression file formats, including ZIP, RAR, CAB, GZIP, BZIP2, TAR, etc. The compression ratio of this software is 30-50% higher than that of common ZIP files. Therefore, it can compress Zip files by 2-10%.7-Zip Main FeaturesThe algorithm is updated to increa
Address: http://www.csdn.com.cn/html/040531/200441448014540.htmlI needed to compress and decompress the file while working on the project, so I downloaded it from the http://www.icsharpcode.net.For the source code for compression and decompression, but after downloading it, I don't know how to start with so much code.I was so patient that I finally found a way to study it. Two types of File compression and decompression are rewritten for your own need
Compress the image file on the angularjs client and then upload it,
We mainly use html5 canvas to compress images, convert them to dataURL, and convert them to Blob files. Blob objects can be directly assigned to Formdata.
app.service('Util', function($q) { var dataURItoBlob = function(dataURI) { // convert base64/URLEncoded data component to raw binary data held in a string var byteStrin
Php calls system commands plus compression. how can we use php to call system commands to decompress uploaded compressed files? at least, zip files can be decompressed, other items like rar or gz can be used. ------ solution ------------------ 1. tar or gzip command line tool must be installed: pack all. txt files under the current directory and compress them to the file exp.tar.gztarczvfexp.tar.gz. *. t php calls system commands plus compression
How
-properties-services
Select the two options under http compression, and select the newly created gzip folder for the temporary directory.
In the Internet Information Service (IIS) manager, right-click "Web Service extension"-> "Add a new Web Service extension ...", In the new Web Service Extension box, enter the extension "HTTP Compression" and add the required file "C:/WINDOWS/system32/inetsrv/gzip. dll, the Windows System directory may vary depending on your installation, select "set extensio
Many documents are transmitted in PDF format, although the PDF file itself is easy to transfer documents, but some file information, especially the picture content more documents, moving a few 10 trillion or even hundreds of megabytes, which is very inconvenient when transferring files. And the file is too large to open the file may cause the system to die. So in the delivery of some documents will be compressed, so that the transfer of files can be helpful to open the view.PDF compression does
//Enter a string of arbitrary strings through the keyboard. ///write a string compression program that will be contiguous in the string//table to compress the repeating letters and output the compressed string. /* such as: input aabbcc, output 2a2b2c; input,,,.., output 3,2. */#include #include #include using namespace STD;voidGrial (Char*SRC) {Char*pnext = src;Char*prve = src;//I chose to modify it on the original string, using the fast and slow poin
[Help] How does phpversion4.4 compress multiple files into one ZIP file? For example, please advise. PHP is 4.4.4. Don't get too New version... ------ Solution ------------------ go online! Currently, no one uses php4, but all of them are php5 ------ solution ------------------ There is a network such as phpclass abroad [help] PHP Version 4.4.4 how to compress multiple files into a ZIP file?
For example, p
Snapshot -- newer quot; 2012-10-0100:00:00 quot; backup/tarczvf...
Linux tar is used to compress files after a certain date. to facilitate incremental backup of server data, appropriate tar parameters can be used to regularly package Java code tar cvf backtup.tar -- newer "2012-10-01 00:00:00" under cron" backup/tar czvf backtup.tar.gz -- newer "2012-10-01 00:00:00" backup/for example, the preceding command can only
During website migration, too many files in the website directory will consume a lot of time, so we need to use the compression and decompression commands, such as, I need to back up the/home/wwwroot folder, however, because wwwroot contains tens of thousands or even more files, you need to use the zip command to compress the wwwroot file and then transfer it:
CD/wwwroot
Zip-r wwwroot.zip wwwroot
OK ,the wwwrootfile is compressed into
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