evolution expeditions

There is a lot of sharing on the internet about the architecture of the website, some of which are mainly analyzed from the perspective of transport and infrastructure (heap machines, do clusters), too concerned about the implementation of technical details, ordinary developers do not understand the basic.This article will mainly introduce the expansion of the large-scale Web site infrastructure, the next part of the focus from the application perspective to introduce the expansion and

We know that a website is with the development of the business, gradually evolved into tens of thousands of servers, Gui the number of users of large sites, through a number of years, even the last ten years ofDeveloped into a large web site, but really personally experienced this development process of people are not many, this kind of person is holding the company stock, drive not to go to people, so becauseFor many people have not personally experienced, so the

working on C (C with Classes), which improved C to band.1983 the language was formally named C + +.The first edition of the C + + standard (c++98) was released in 1998 with the official name ISO/IEC 14,882:1998.The second edition of the C + + standard (C++03) was released in 2003 with the official name ISO/IEC 14,882:2003.The third edition of the C + + standard (C++11) was released on August 12, 2011, and the official name is ISO/IEC 14,882:2011.August 18, 2014 release of the C + + standard fou

Http://www.ha97.com/5095.htmlWhen it comes to large sites, you have to say the features of large websites: high concurrency, large traffic, high availability, massive data, and more. Let's talk about the evolution of the architecture of large web sites.1. Initial phase of the site architectureThe initial phase is relatively simple, usually a server can take a website, look at the picture:2. Application Service and Data service separationWith the devel

Issue: Send mail using Evolution mailbox Client on Ubuntu system, but send attachments are evolutionClient-side conversion for DAT formatSolve:The first step:650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/82/57/wKioL1dRaq3DJwhIAAG1oqOA9DM269.png "title=" Evolution2.png "alt=" Wkiol1draq3djwhiaag1oqoa9dm269.png "/>Step Two:650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/82/58/wKiom1dRamGSGNCoAAGCnrNiM1E569.png "title=" Evolution3

is the "smallest representation unit" in the computer.②8bit = 1bytes, is the "smallest storage unit" in the computer, and the 1bytes abbreviation is 1 B.the evolution of character encoding GBK18030 and GB2312 and GBK1.0 there are hundreds of languages all over the world, Japan has made Japanese into shift_jis, and Korea has made Korean into Euc-kr . countries have national standards, there will inevitably be conflicts, the res

One day, I had a whim to create a site, based on the LNMP architecture, initially only I visited, and later because I was a bit more and more traffic, so eventually led to the following architecture evolution.1. Single machine because it is only a small station, the number of visits a day does not have much UV (less than 100), so with a 1-core 1g machine enough. The CentOS system is installed on the machine, and the NGINX+PHP-FPM+MYSQL environment is

Design mode (Patterns)--the basis of reusable object-oriented softwareDesign pattern is a set of reusable, most known, categorized purposes, code design experience Summary. Design patterns are used in order to reuse code, make code easier to understand, and ensure code reliability. There is no doubt that design patterns in others in the system are multi-win, design patterns so that code is really project, design patterns are the cornerstone of software project, like a block of bricks and tiles i

operations are synchronous blocking calls, and asynchronous file read and write operations are not supported. 　　JDK1.7 launches NIO 2.0. The following three improvements are mainly provided. Provides APIs that can obtain file attributes in bulk, which are platform agnostic and not coupled to the file system of the feature, and also provide the SPI for the standard file system for each service provider to extend the implementation; Provides AIO functionality to support file-bas

Message middleware has Ali's Dubbo, can match with Google Open Source distributed program Coordination Service zookeeper implement server registration and discovery. Structure after introduction of message middleware: 10, summary The above evolution process is just an example, not suitable for all sites, the actual site evolution process and its own business and different problems have a close relationship

Give your photographers a detailed analysis of the techniques of the evolution white balance of Canon 7D cameras. Skill Sharing: Key points for flexible application: 1, the usual use of automatic white balance can be. When you want to get a special effect, use raw imaging to handle it. 2, especially with a good mix of light coping ability, so do not know how to set up, use the automatic white balance shooting it. 3, usually the blue will be stron

. -------------------------------------------------------------------------------- The constituent elements of ado+ Now I want to introduce the main ado+ object. We begin with the origin of all content, the DataSet object. Data set is the evolution of ADO recordset. The dataset is nothing more than a disconnected, in-memory view of the database. There is no strict relationship between a dataset and a data source in terms of any information that

server| Stored Procedures | paging A brief discussion on the evolution of SQL SERVER paging stored procedures Author: ZhengzoDate: 2006-9-30For database data in the UI interface pagination is a cliché question, the Internet is easy to find a variety of "common stored Procedures" code, and some also customized query conditions, it looks very convenient to use. I intend to use this article to briefly discuss the paging stored procedure based on SQL Serv

Tags: library sub-table compensation mechanism Message QueuingAs the volume of business increases in the production environment, the amount of database data can also increase dramatically. When the amount of data in the database reaches a certain level (database bottleneck), the host load of the database is very high, which can seriously affect the business, and seriously cause the database to be down.In order to avoid this extreme situation, we should make a plan before the occurrence, to solve

In enterprise app development, there is a unique notification push function for Apple devices to solve, especially when doing mobile IM, the APNs (Apple Push Notification service) requirements are relatively high, although there are special third parties to provide such services, But for the safety of the filter, the ability of the company would rather self-built push service system. I combine the development experience in the work, in this discussion of the

, its product release frequency is very high.Asymptotic development: Unlike traditional software products or enterprise applications, where all functional and non-functional requirements are planned from the outset, almost all large Internet sites start from a small website and evolve incrementally.Second, the development of large-scale website Architecture Evolution history1, the initial stage of the site structureAll resources, such as applications,

The evolution of GarbageCollection in PHP5. PHP is a managed language. in PHP programming, programmers do not need to manually allocate and release memory resources (except for PHP or Zend extensions written in C ), this means that PHP itself is a hosting language. in PHP programming, programmers do not need to manually handle the allocation and release of memory resources (except for PHP or Zend extensions written in C ), this means that PHP implemen

Evolution of the garbage collection algorithm in PHP5. PHP is a managed language. in PHP programming, programmers do not need to manually allocate and release memory resources (except for PHP or Zend extensions written in C ), this means that PHP implements spam. PHP is a hosted language, in PHP programming, programmers do not need to manually allocate and release memory resources (except for PHP or Zend extensions written in C ), this means that PHP

Sitch: In recent years, the 3G wave of China Telecom has been surging in the cloud, from the high-tech experience brought by 3G technology to the civilian population, various media are also not talking about the bright future of 3G. Unlike the "publicity" of 3G propaganda, there is another "dark stream" that is also unstoppable in the field of telecommunications technology, its emergence and development, it will also bring a brand new business experience to all telecom end users and non-end user

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