SEARCH KEYWORD -- Data center


  10 design principles of Google data center

Google's data center supports the world's largest search engine, smart phone application platform and cloud computing services. The data center is Google's core engine and competitiveness. Over the years, Google also plays the role of the founder and innovator of large-scale web service data center technology. Its data center infrastructure design is also at the forefront of the industry, including renewable energy use, low-power refrigeration, new energy utilization as well as data center room ...

   Google,Data center,Design principle     2013-03-11 19:09:25

  CSS DIV position analysis

When using CSS to set the position of DIV, we may often get confused with the 4 position properties : static, relative, absolute and fixed. If we don't understand them correctly, we may often get unexpected result. Here we make some analysis to them.The definitions of these 4 properties:static : The default position property. It has no position actually. The element will appear where it should be (top, bottom, left, right or z-index has no use here)relative : This one will position relati...

   CSS, DIV,position,relative,absolute     2013-01-29 03:23:57

  A list of different CAPTCHA designs

Here is a list of website CAPTCHA designs which demonstrate all kinds of weird verification methods. By looking at these designs, as a website designer, you should distinguish which design is accessible and which is not.Is this human readable?What characters are in the picture?One moreWe will be crazy if we see theseOMG,What's the answer?IQ Test?Are you a normal person?You know how blind people read?ASCII PictureAre you an adult?3D verification codereCaptchaIt increase a new feature recently. It...

   CAPTCHA,Website design     2012-07-19 11:51:06

  Ways to make elements in HTML center aligned horizontally

In our daily HTML design,  it is an easy job to horizontally center align an element with known width. <div class="element">I am<a href="http://www.aiubug.com" target="_blank" rel="external" title=""> bug </a>！</div>  .element{width:960px;margin:0 auto;}  The above codes set the width of the div block and horizontally center align it. It's very easy to implement. However, if we have some elements we don;t know their width and we still want to...

   HTML,CSS,Center align,Unknown width     2012-07-11 12:55:00

  WeChat 5.0 is coming soon

WeChat 5.01 now is available on App Store, but on Android, you still need to wait for some more time. If you want to experiment with new features of WeChat 5.0 now and you are using Android, you can request a beta version of WeChat 5.0 through here .Let's check out the new features first. WeChat 5.0 adopts the popular flat design, it focus on game platform. Main features are: You can play games with friends in game center Add bank account to pay with WeChat New bookmark function, you can bookm...

   WeChat 5.0,New fetuares     2013-08-04 22:42:45

  Books for entry level C programmers

In computing, C is a general-purpose programming language initially developed by Dennis Ritchie between 1969 and 1973 at Bell Labs Its design provides constructs that map efficiently to typical machine instructions, and therefore it found lasting use in applications that had formerly been coded in assembly language, most notably system software like the Unix computer operating system.To learn C, we need to read many C books and have many practices. Here we summarize a list of C books which may h...

   C,Book,Beginning     2012-07-26 14:00:51

  8 very useful and free web security testing tools

With more pervasive of web applications, web security threats are becoming increasingly prominent. Hackers gain web server control by exploiting web server vulnerabilities and SQL injection vulnerabilities, then they may tamper with web content, or steal important internal data, the more serious is to inject malicious code into web pages to affect visitors of websites. Attention is gradually warming up to Web Application Security. Here we recommend eight very useful and free web security testing...

   Website, security,Web security,Attack     2012-07-22 10:59:09

  Gaussian Blur Algorithm

Usually, image processing software will provide blur filter to make images blur. There are many algorithms to implement blur, one of them is called Gaussian Blur Algorithm. It utilizes Gaussian distribution to process images. This article is to introduce Gaussian Blur algorithm, you will find this is a simple algorithm. In fact, it is a kind of data smoothing which can be used in many situations. 1. Gaussian Blur theory The so called blur can be understood as taking a pixel as the average valu...

   ALGORITHM,GAUSSIAN BLUR, IMAGE BLUR     2020-09-12 02:34:40

  TIOBE: PHP is coming back

TIOBE released the programming language index for July 2013. The highlight of this month is that PHP is coming back. It ranks the fifth and has an increase of 1.54% compared to January. There are no changes in the ranking for the top 4 languages. The reason why PHP is back may be attributed to the new PHP Zend Framework that was released in September 2012, but this reason is not very convincing. PositionJul 2013PositionJul 2012Delta in PositionProgramming LanguageRatingsJul 2013Delta Jul...

   TIOBE,PHP,Zend framework,July     2013-07-09 05:22:50

  Will PHP __autoload() function really affect performance?

IntroductionRegarding to PHP performance, the most frequently discussed is the __autoload() function. Many people say that this function will affect the performance very much, some other people say that opcode will affect __autoload() as well. So we will have some tests on these two.EnvironmentPHP 5.3.9 -- Launch under fastcgi modeNginx 1.1.12eAccelerator 0.9.6.1ScreenshotsLaunch pageeAccelerator(In php.ini) configurationFile structure(each Test file has over 6000 lines of code)Testing With e...

   PHP,__autoload(),opcode,performance     2012-05-09 11:25:26

RECENT