advantages of mongodb

Hello everyone, today to share with you the pros and cons of free space problem. Now a lot of domain name business host space vendors in vigorously promote the free things. So how much do you know about the free stuff? Everyone knows you can get it without money. But you only see the surface, do not see the inner side, think about it, the General people will give you free of what the concept, others can not lose money to you on the free throw, for you to use it. Once heard an old-timer said a wo

Some of the advantages of PHP (purely personal opinion) 1, the support database is very extensive, big to sybase,mssql,oracle, small to MySQL and so on support. Through ODBC, the support is more extensive. 2. Good cross platform and support Winnt,win98,linux,unix. Support for a variety of web Apache,iis SERVER. 3, free software, upgrade fast. Not like the ASP hundreds of-year promotion. 4. Free of charge. and Apache,linux,mysql and so on are free. 5,

CSS cascading style Sheets (CSS), translated as "cascading style sheet" or "Cascading style sheet", also referred to as "style sheet." The introduction of CSS is used to extend HTML, not to replace HTML. In other words, CSS is inseparable from HTML, it is just an auxiliary tool, is a supplement to HTML functions. the advantages of CSS In the CSS standard, not only redefine the original HTML style, such as the size of text, color, etc., but also ad

advantages of the Observer model?： An abstract coupling between the observer and the observed is very easy to expand, whether it is to increase the observer or the observer. According to the principle of single responsibility, the responsibility of each class is unitary, then how to put each single responsibility into a real complex logical relationship, the Observer model can play a role in the bridge. The observer pattern is typical of loose coupli

-oriented languages. Java and C # are the two most popular object-oriented languages at the moment.From the beginning to the process (Procedure oriented, is a process-centric programming idea), after the object-oriented gradually become mainstream, object-oriented language began to occupy the stage of history. The first object-oriented program is not written in object-oriented language, the use of process-oriented language can also write object-oriented programs, but to achieve more twists and t

1. Distinction between Ngui and Ugui 1) Ugui Canvas has world coordinates and screen coordinates 2) Ugui image can be used material 3) Ugui through mask to cut, and Ngui through the panel clip 4 Ngui rendering sequence is through the depth of the widget, and Ugui render order according to the hierarchy order, the more below rendering at the top level. 5) Ugui do not need to bind Colliders,ui can automatically intercept events 6 Ugui Anchor is relative to the parent object, does not provide advan

Front-End time to write a "use of CSS framework for efficient site development", a lot of friends asked me related questions. Very early 5key in the company for the framework of CSS frameworks, but also to many friends of the proposed CSS framework. The effect is very obvious. Of course, the CSS framework has advantages and disadvantages, and recently read some related articles. Some thoughts, share with you. The benefits of CSS frameworks: 1, the dev

Advantages of the jquery paging effect var total=$ (. Class). length; Gets the total number of elements that need to be paginated var radio=3;//according to the width screen to obtain the number of offer per page display: var pagesize=parseint (Total/radio); The total number of pages received; if (sum% radio!=0) {pagesize+=1; } var currentpage=1; The current page is the first page//pages forward code: $ (. Leftarrow,parentelem). Bind (' clic

Dom in recent years, with the rapid development of web technology, ASP (application Service provider) has received more and more attention as a new service field. Although globally, the current ASP is still in the initial stage of development, but according to IDC forecast, in 2003, ASP's turnover will rapidly expand to 4.5 billion U.S. dollars. So what are the advantages of the rapidly growing ASP market in the world's leading electronic collaborat

to support HTML5, but there are still many incomplete support or compatibility. 　　Google and HTML5 　　 May 22, 2010, Google created a graffiti to commemorate Pac Man's video game. This graffiti is an animation, but also a game that can play Pac man. The graffiti was made by Google by using the HTML5 standard, and of course Google also provided a flash version to support incompatible HTML5 browsers. I bet this is the first time that most Internet users have contacted HTML5. This is

previous site content. Because in the search engine database has not completely deleted the previous site all the data, so this need to give the search engine more time to recognize the new site. My friend's website listens to him to say that it is almost one months before beginning to collect. The old domain name to do a new station has a certain advantages and disadvantages, for its needs according to our actual situation, said here, hope to help

With the gradual deepening of network application, the Telecom class switch, especially the three-layer switch, has become the focus of the market contention. However, in different functions, a wide range of switch equipment, users how to remove the fog, to find their own application characteristics of the product? This not only requires users to start from the traditional switch evaluation indicators, consider the price of products, but also pay special attention to whether the product can prov

features such as automatic discovery of sensitive data, automated compliance reporting, and data set access control. Documentation and Consulting The lack of documentation is another common enterprise problem. Roles and specifications are constantly changing, and consultants and employees are leaving. Unless the roles and specifications are clearly documented, much of the work must start from scratch when a change occurs. This is a major problem with open source Apache Hadoop. On the contrary

support the "IP Tunneling" (IP Encapsulation) protocol, the server may only be limited to some Linux systems. Iii. Direct routing mode (VS-DR) Principle: Both the Load balancer and RS use the same IP external service, but only Dr responds to ARP requests, all RS to the ARP request of itself this IP is silent that is to say, the gateway to the service IP request all directed to the DR, and Dr received the packet according to the scheduling algorithm, find the corresponding RS, To change the d

In the process of doing SEO, see a lot of friends are more and more inclined to long tail keyword, more and more aware of the power of the long tail keyword, I am also so, but this does not mean to do the station need to discard hot keywords. Hot keyword as the main entrance of traffic, still has very important significance. Today, I would like to talk about my experience, the four kinds of advantages of the hot keyword. The main features of the popu

1.Varnish is an HTTP accelerated cache proxy, performance advantages to replace the previous squid cache mechanism, 4 varnish equals 12 sets of squid, its performance is stable, high efficiency, many e-commerce enterprises are using varnish to achieve a higher reading speed. How the Varnish works When the client first access, it directly through the database to read the target, and save the target in their own cache space, when the second visit, you c

While there are few BI suite on the market, such as MicroStrategy and Pentaho, they have been competing with SAP's business Objects BI Suite. Many of the more leading BI tool vendors, such as tableau or qlikview, may be able to surpass SAP in some areas, but some of the features of SAP BI Suite are still not achievable. The biggest advantage of SAP BI Tools is its deep integration with other SAP applications, including SAP Business Suite, ERP, and EPM tools. The breadth of its bi tools and th

When you burn a data disc under Windows XP, you copy the file you want to burn to a mirrored drive, and then burn it as a mirror. This process may seem complicated, but Windowx XP has done all the preparation for us, so just add the file you want to burn by adding it to the list on the disc by copying-pasting, dragging and dropping the file or selecting the file. Here are two examples to illustrate the specifics of the operation and to explore the advantage