evolution expeditions

the evolution process of large Web site system architecture from stand-alone to billion-level traffic Stage One, stand-alone build Web site At the beginning of the site, we often run all our programs and software on a single machine. At this point we use a container, such as Tomcat, Jetty, Jboos, and then use the Jsp/servlet technology directly, or use some open source frameworks such as Maven+spring+struct+hibernate, maven+spring+ Springmvc+mybatis

scale of more than thousands of people, the Conference gathered in the domestic level of the highest data architect, Database management and Operations engineers, database development engineers, research and development directors and IT managers and other technical people, is currently the most popular and most popular database technology Exchange event. This year is the five anniversary of China Database technology Conference, the General Assembly will continue to share the purpose of best app

invoke subclasses within the a application, so that the framework has the power to execute the software and the framework directs the execution of the application.Based on the framework software architecture described above, developers can develop small, independent frameworks based on this framework, which is a composite framework. For example, in a large framework to provide game framework, multimedia framework. The emergence of this composite framework greatly reduces the burden on applicati

The method is simple. You only need to install one software in Ubuntu. Open the terminal, enter the command: sudoapt-getinstalllibgcal0, open Evolution, click Calender in the lower left corner. Click "File- gt; New- gt; Calender" on the menu bar and change the calendar format to 'Google '. Enter the Google user name and password. Right-click the column on the left to add a calendar and refresh it. Effect The method is simple. You only need to install

Let's talk about the evolution of IOC and the path of ioc. Preface In the previous article, I mentioned Spring in the permission design implementation. net ioc framework, many Yuan users consulted me about the concept of IOC through the QQ group. I feel it is necessary to write a blog post to briefly introduce the evolution of IOC, and how to use third-party mature IOC containers in actual projects. We hope

performance of the hardware on the average distribution of data, if the horizontal split server performance differences, then the average distribution is caused by the emergence of hot issues, if we do not change the hardware differences, Then we have to add weights in the allocation principle of the algorithm to dynamically adjust the distribution of data, so that the production of artificial data distribution imbalance, then to the upper level of the calculation operation of some scenes we wi

The following is an introduction to the HTML5 touch event evolution tap event. I think it is quite good. Now I will share it with you and give you a reference. Let's take a look at the touch event as a HTML5 event unique to mobile browsers. Although the click event is more common on PCs and mobile terminals, there will be a Ms latency on mobile terminals, which affects user experience, ms latency is determined by double-click and long-press, because t

The evolution of the Apache Kylin Big data analytics PlatformExt.: http://mt.sohu.com/20160628/n456602429.shtmlI am Li Yang from Kyligence, co-founder and CTO of Shanghai Kyligence. Today I am mainly here to share with you the new features and architecture changes of Apache Kylin 1.5.　　　　What is Apache Kylin?　　Kylin is an open source project developed in the last two years and is not very well known abroad, but is widely known in China. Kylin's positi

In the previous article I talked about a front-end separation scheme, this set of solutions in front of the server developers than in front of the Web front-end developers may get more applause, I think many senior front-end engineers see such a technical solution may have a kind of contradictory mood, When my work gradually toward more and more professional front-end development, I am often confused by this set of front-end separation scheme, recently I finally understand the source of this con

data, that is, the performance of the hardware on the average distribution of data, if the horizontal split server performance differences, then the average distribution is caused by the emergence of hot issues, if we do not change the hardware differences, Then we have to add weights in the allocation principle of the algorithm to dynamically adjust the distribution of data, so that the production of artificial data distribution imbalance, then to the upper level of the calculation operation o

behavior of confrontation, that is, ordering cheap food, in order not to pay too much money in the end, escape and cooperate at the same time, and the bill is controlled in a reasonable and acceptable range. There are always a large number of people who adopt a wait-and-wait strategy in the congestion process to eventually lift the congestion. This is another example, which is common on the Internet, this is true for both protocol design and pre-computer behavior. In general, there is always co

For applications, data storage is very important. In [Android evolution 13], sharedpreferences is stored in simple key-value format and stored in mobile phones in XML format. This is simple and convenient, A good data storage tool can only store simple data. It is inconvenient to store a large amount of data. In [Android evolution 14th], I wrote an example of an SQLite database storing data address book. SQ

caused by the emergence of hot issues, if we do not change the hardware differences, Then we have to add weights in the allocation principle of the algorithm to dynamically adjust the distribution of data, so that the production of artificial data distribution imbalance, then to the upper level of the calculation operation of some scenes we will not consciously add the weight of the dimension. However, as the author of my objection to this approach, these objections are specific as follows:Obje

High concurrency Server Architecture Evolution of large website architecture Three server requirements: High Performance: rapid response to a large number of requests High Availability: uninterrupted, automatic failover occurs, which is called fail over (Failover) Scalability: Cross-machine communication (TCP) In addition, any network system structure can be abstracted into a C/S architecture. We often say that the B/S mode is essentially a C/S archi

JDBC evolution 3-supplement: transaction processing, jdbc3 -- Next, the evolution of JDBC 3. Let's talk about database transactions.Transaction:A group of logical operation units that convert data from one state to another.How can this problem be solved?A set of logical units: I think it refers to multiple DML operations. If it is just a DML statement, mysql will automatically submit the statement after th

"render pages" to implement the layout of pages and business logic. The separation of front-end and business logic is achieved here, but as we have said before, a system has not only the "X" layer, but also the well-known "layer ", it is a general written specification. In practice, we can abstract it on the "known layer" based on business needs, and wrap it on the "System" layer. Next, add a "Data Access" layer based on MVC. Of course, this is not exclusive to a specific system. Basically all

solution of ZTE and China Mobile's own C-RAN. The new architecture can effectively realize the energy-saving, efficient, virtualized, and converged Wireless Access Network of the "large capacity and few bureaus", and also realize the use of SDR radio technology and general-purpose processor platform GPP) and RF components to effectively implement the architecture expansion, upgrade, and evolution defined by the software/hardware system, as well as th

When a new technology or product emerges, everyone is eager to know whether or when the new product will completely replace the original product. In fact, many products have a "long tail effect". For example, when a disk backup occurs, people think that the tape will soon exit the market, but today the tape is still the main force of backup and archiving; after the emergence of SSD, many people think that it will eventually replace the mechanical hard disk, but at least from now on, it is not ea

High-Performance MySql evolution: Introduction to the principles and features of common index types bitsCN.com High-Performance MySql evolution: Principles and features of common index types As we all know, the impact of indexes on database performance is crucial, but it may not be clear why indexes can improve query efficiency and the types and characteristics of indexes, this article will give a brief i

With the continuous development of wireless networks, multi-Stream Aggregation (MSA, Multiple Stream Aggregation) can improve the edge throughput by 500% through deep fusion of Multi-standard, multi-carrier and multi-layer networks, realizing the concept of borderless networks enables users to enjoy high-speed and stable data access services wherever they are on the network. It will become a key technology for network evolution in the future. The popu