data compression book

This article data is wrong, cause the compression effect conclusion seriously deviate from the fact, the correct situation is, that is, use deflate compression, and gzip compression effect is very similar, because they are originally from Huffman coding in the branch out ... If you also want to understand the next tran

In general, if you want to provide the site with an address book program, the need to use CGI combined with the background database technology, the requirements of the Web server is relatively high, in many do not provide database functionality of the virtual host can not even achieve. Of course, we can also use TXT text to replace the database, but txt text is more difficult to operate, we have to read a row of judgment, but also to use a delimited s

This article describes how to use the zlib module to compress data in Python. it is a basic knowledge of getting started with Python. For more information, see The Python Standard module, multiple modules are used to compress and decompress data, such as zipfile, gzip, and bz2. I introduced the zipfile module last time. today I will talk about the zlib module. Zlib. compress (string [, level])Zlib. decompr

A few years ago, when I was doing the mapping app algorithm,Once thought about compressing the 3D Lut preset data,Primarily used to enhance the user experience.About the 3d Lut algorithm open source resources are also quite a lot of, do not do more science.Interested friends, can go to the next FFMEPG project related implementation code.The first contact 3d LUT algorithm is the 2014 reverse VSCO Cam film algorithm,Of course, at first I didn't know tha

Sometimes in the backup or synchronization with a large number of files (such as a few GB or dozens of GB of database directory, log directory), the direct SCP takes longer, although the first compression and re-transmission can be decompressed, the amount of data transmitted is really reduced, but compression and decompression will also take a lot of time , the

the Java implementation of the Big Data bitmap method (no repetition , repetition, deduplication, data compression)Introduction to Bitmap methodThe basic concept of a bitmap is to use a bit to mark the storage state of a data, which saves a lot of space because it uses bits to hold the

Author: http://book.douban.com/review/5020205/ meat Xiaoqiang One day two years ago, when I was still in college, I strolled around in a small bookstore in the school and found the big talk design model. I was immediately attracted to the design. Program The Design book can also be so interesting, so I remember the name of the interesting and easy-to-understand author, Cheng Jie.Later, on the blog of Wu fan's eldest brother, he finally asked for a ne

format morning redundancy, binary format transmission efficiency, but will make the volume of data larger, which affects performance, but converted to binary can encrypt the data transmission. Therefore, it is very important to use the transmission advantages of binary itself. Here are the test results Read 2w data from the database when this test is not named,

1-1: One of the basic questions about data compression is "what are we going to compress" and how do you understand that?For:A: Data compression, refers to the premise of not losing useful information, with a minimum of digital representation signal source signals, reduce the capacity of a given message set or

can be accessed online. You can use the following command to export a "naked warehouse" and then use the SCP command to copy them to your server:$ git clone --bare /home/user/myrepo/.git /tmp/myrepo.git$ scp -r /tmp/myrepo.git myserver.com:/opt/git/myrepo.gitIf other people also have an SSH account on the myserver.com server, TA can clone the (clone) code from this server:clone myserver.com:/opt/git/myrepo.gitThe above command will prompt you to enter the SSH password or use the public key.Viii

Tags: return storage guide Sort select CentOS init ase IDEnvironment: centos6.5_x64Influxdb version: 1.1.0 Data compression can be referenced by: https://docs.influxdata.com/influxdb/v1.1/concepts/storage_engine/#compression Influxdb different compression algorithms are used depending on the

---restore content starts---1.1-1 I personally understand "what we want to compress" in data compression:A: Data is a very broad concept, so data compression is not only compressed numbers, but also the need for files, images, graphics, text, video, audio and so on compression