network topology advantages and disadvantages

I. preface some time ago, I have translated an article about changing your website from MySQL to PostgreSQL, in fact, I was more interested in the specific operation of converting the background database of an application from MySQL to PostgreSQL, and did not care about the advantages and disadvantages of MySQL and PostgreSQL. I did not expect an unexpected response, therefore, I think it is necessary to wr

to talent. Private enterprises should be carefully considered. 5. Foreign companies Benefits: High Salary, good welfare, and good working environment; foreign companies have a systematic corporate culture and management system, so they can learn more; they emphasize personality and creativity, which is conducive to cultivating abilities, it is also conducive to building your own network of contacts, focusing on employee development and providing

Let's talk about the advantages and disadvantages of Ajax. Ajax, short for Asynchronous Javascript and XML, is a dynamic WEB application development technology that enriches the user experience. Even WEB applications developed with Ajax can experience desktop applications. Of course, like other technologies, Ajax also has its own advantages and

persistent data storage. At the same time, the master and slave data generates an RDB file and uses the buffer zone to add new data updates for corresponding synchronization. 3. Rich features Pub/sub, key expiration Policy, transaction, and support for multiple databases. 4. Good Performance Because it is a full-memory operation, the read/write performance is very good, and the frequency can reach 10 W/s. The company has projects that use redis. The current access frequency is 80 w/s. Through

?" (Pull ). This is why this technology is often called reverse ajax. Other aliases: Comet, reverse Ajax 2. how to implement Push In fact, the so-called push technology is not so complex. currently there are three types of push technology in the main category, one is still based on ajax, and the other is based on the framework, the last one abandoned the traditional HTTP protocol and used Flash or HTML5 WebSockets technology. Next, we will discuss the different methods of these three categorie

(Switch) what are the advantages and disadvantages of PHP object-oriented and PHP process-oriented comparison ?? Object-oriented and process-oriented programming can only be used in many programming languages. However, PHP is different from other programming languages, that is, we can freely choose or mix PHP object-oriented and PHP object-oriented processes. Currently, the vast majority of PHP programmers

(Switch) what are the advantages and disadvantages of PHP object-oriented and PHP process-oriented comparison ?? Object-oriented and process-oriented programming can only be used in many programming languages. However, PHP is different from other programming languages, that is, we can freely choose or mix PHP object-oriented and PHP object-oriented processes. Currently, most PHP programmers use process-orie

software similar to Nginx/lvs/haproxy, which is implemented at the software level, so it's very inexpensive.At present, the structure of the Web site architecture is generally more reasonable: the Web front-end uses nginx/haproxy+keepalived as the load balancer, and the backend uses the MySQL database as a master and read-write separation, using the lvs+keepalived architecture. Of course, according to the specific needs of the project plan.The following is the respective characteristics and app

This article describes the advantages and disadvantages of three Linux Server monitoring technologies, including SNMP proxy (client), SSH, and private proxy (client) installation. The powerful functions and beautiful interfaces of linux make many enterprises use linux as servers. The following describes the advantages and dis