Shulou(Shulou.com)06/03 Report--

After purchasing the CDN service, users will be more concerned about the actual effect in the process of using it. First of all, make sure that it has been activated successfully, and then follow the basic steps to add accelerated domain names and configure CNAME. After all, you can test whether the CDN acceleration is successful. At present, there are still many CDN servers and management software, but due to the limited space, we mainly recommend the top ten CDN servers and management software with good ranking and reputation.

Top 10 CDN servers and management software recommendations

CDN server is a new way to build a network server. Now we build a website project for a wide range of users, there are domestic and foreign customer base, especially in the domestic user group, we also have telecom, mobile, Unicom and other different lines. Generally speaking, the virtual host and VPS server we buy have only one IP address, and certainly no merchant ensures the stability and speed of 100% lines. In order to optimize the original network architecture services, CDN servers are born.

It is necessary for enterprises to build their own CDN servers so as to achieve website acceleration. When building a station, ordinary enterprises will consider using CDN acceleration. There are free and paid, no matter it is free or paid, the principle is similar. Users in the visitor area can get close to the node through multiple nodes to improve the access speed. At present, there are many kinds of CDN server software in China, so let me recommend the next 10 CDN servers and management software for you.

Nginx

Nginx is a high-performance HTTP and reverse proxy server, as well as an IMAP/POP3/SMTP server. Nginx was developed by Igor Sesoyev for the second most visited Rambler.ru site in Russia, and the first public version 0.1.0 was released on October 4, 2004.

Nginx is a lightweight Web server / reverse proxy server and email (IMAP/POP3) proxy server, and is distributed under a BSD-like protocol. It is characterized by low memory and strong concurrency ability. in fact, the concurrency ability of nginx does perform well in the same type of web server. Chinese mainland uses nginx website users: Baidu, JD.com, Sina, NetEase, Tencent, Taobao and so on.

ZL, the editor of Public TV Media, said that Nginx can be compiled and run on most UnixLinux OS, and there is a portable version of Windows. The 1.4.0 stable version of Nginx was released on April 24, 2013. in general, for new sites, it is recommended to use the latest stable version as the production version, and existing sites are not urgent to upgrade.

In the case of high concurrency of connections, Nginx is a good substitute for Apache servers. Nginx is one of the software platforms often chosen by owners of the virtual hosting business in the United States, which can support responses of up to 50000 concurrent connections.

As a load balancing server, Nginx can not only directly support Rails and PHP programs for external services, but also support external services as HTTP proxy servers. Nginx is written in C, both the system resource overhead and the efficiency of CPU are much better than Perlbal.

Squid

Squid is a high-performance proxy cache server, and Squid supports FTP, gopher, HTTPS and HTTP protocols. Unlike normal proxy caching software, Squid uses a separate, non-modular, Imax O-driven process to handle all client requests.

ZL, editor of public TV media, said that Squid is a kind of software used to buffer Internet data. Its main function is to accept requests from targets that people need to download and handle these requests appropriately. That is, if a person wants to download a web page, he asks Squid to get the page for him. The Squid then connects to the remote server and makes a request to the page. Squid then explicitly aggregates the data to the client machine and makes a copy at the same time. The next time someone needs the same page, Squid can simply read it from disk so that the data is immediately transferred to the client.

The current Squid can handle protocols such as HTTP,FTP,GOPHER,SSL and WAIS, but it cannot handle things such as POP,NNTP,RealAudio and other types. Squid runs on most Unix and OS/2 versions of systems, and one known to work: Windows,AIX,Digital Unix,FreeBSD,HP-UX,Irix,Linux,NetBSD,Nextstep,SCO,Solaris.

ATS

Apache Traffic Server (ATS) is a high-performance, modular HTTP proxy and cache server, similar to Nginx and Squid. TrafficServer was originally a commercial product of Inktomi, which was acquired by Yahoo in 2003, Yahoo contributed the source code to the Apache Software Foundation (ASF) in August 2009, and became a top-level project of ASF (Top-LevelProject) in April 2010, Apache TrafficServer is now an open source project, the development language is C++.

According to ZL, the editor of Public TV Media, ache Traffic Server is a fast, scalable, scalable and compatible server with HTTP/1.1 cache proxy. It has the following features:

Caching: improves response time while reducing server load and bandwidth requirements by caching and reusing frequently requested web pages, images, and Web Service calls.

Proxies: it is easy to add persistent connections, filters, or asynchronous content requests, and load balancing can be achieved by adding a proxy layer.

Speed: it is scalable on modern SMP hardware and can handle tens of thousands of requests per second.

Extensibility: API allows for custom plug-ins, modifies headers and content, and implements new protocol handlers.

Reliability: ability to handle TB-level data perfectly, including forward and reverse proxies.

The latest version released by the Apache Software Foundation is Apache Traffic Server v3.0.0, and its benchmark result is that it can process more than 200000 requests per second, an increase of 277% compared to v2.0.

Varnish

Varnish is a high-performance open source HTTP accelerator, and the varnish project is the first version 0. 9. 0 released in 2006. It has been more than a decade. After the hard work of varnish development team and netizens, varnish is now more efficient and takes up less resources, and many portals have deployed varnish.

Public TV media editor ZL introduced that Varnish is similar to general server software, which is divided into master (management) process and child (worker, mainly do cache work) process. The master process reads in commands, does some initialization, and then fork and monitors the child process. The child process assigns several threads to work, mainly some administrative threads and many woker threads.

For the file cache section, master reads in the storage configuration (- s file [, path [, size [, granularity]]), invokes the appropriate storage type, and then creates / reads large cache files of the appropriate size. Then, the real work begins, and one of the threads in Varnish responsible for accepting a new HTTP connection starts waiting for the user, and if there is a new HTTP connection, it is always responsible for receiving, and then wakes up a waiting thread and gives it the specific processing.

Tengine

Tengine is a Web server project initiated by Taobao. On the basis of Nginx, it adds a lot of advanced functions and features to meet the needs of high-volume websites. The performance and stability of Tengine have been well tested in large websites such as Taobao and Tmall Mall. Its ultimate goal is to create an efficient, stable, secure and easy-to-use Web platform.

According to ZL, the editor of Public TV Media, Tengine inherits all the features of Nginx-1.8.1 and is compatible with the configuration of Nginx. It has more powerful load balancing capabilities, including consistency hash module and session persistence module. It can also actively check the health of backend servers, automatically go online according to server status, and dynamically resolve domain names that appear in upstream.

And Tengine supports HTTP/2 protocol, and HTTP/2 module replaces SPDY module; supports asynchronous OpenSSL, and can use hardware such as QAT to accelerate and uninstall HTTPS; supports proxy, memcached, fastcgi, scgi and uwsgi modules; supports specified keywords (domain name, url, etc.); and can automatically set the number of processes and bind CPU affinity according to the number of CPU; monitor the load and resource occupation of the system to protect the system.

HAProxy

HAProxy is free and open source software written in C language [1] that provides high availability, load balancing, and TCP and HTTP-based application proxies. HAProxy is especially suitable for heavily loaded web sites, which usually require session persistence or seven-tier processing. HAProxy runs on current hardware and can support tens of thousands of concurrent connections. And its mode of operation makes it easy and secure to integrate into your current architecture, while protecting your web server from being exposed to the network.

According to ZL, the editor of Public TV Media, HAProxy implements an event-driven, single-process model that supports a very large number of concurrent connections. There are three ways to configure HAProxy Session affinity: user IP identification, cookie identification and session identification. Need to be reminded because HAProxy is a single-process, event-driven model of software, single-process efficiency is already very good, it is not recommended to open multi-process / multi-instance.

Fikker

Fikker is a server system software of Guangzhou non-guest Network Technology Co., Ltd. Is a professional website caching (Webcache) and reverse proxy server software (Reversed Proxy Server) for CDN/ webmasters. The CDN system developed independently from scratch, the cache node server developed in C language, Fikker provides a complete secondary development interface, and provides a set of free and open source PHP master control system. At present, Fikker is generally a self-built CDN system for small and medium-sized users, and Fikker charges are low and provides complete help instructions, but there is no one-to-one manual technical support service.

The self-built method of Fikker is: self-built CDN = multiple Fikker cache nodes + one CDN master (free / PHP/ open source / optional installation) + third-party intelligent resolution (CloudXns/DNSpod/ Ali Cloud resolution / Tencent Cloud resolution, etc.). According to the media editor ZL, Fikker also has the following features:

1. Three-level cache design: the memory is a first-level cache, which is used to cache small pages (less than 1MB), reduce the bottleneck of hard disk IO and respond to user requests at a high speed. SSD solid state drives (optional) are secondary caches for caching small files (less than 5m). HDD regular hard disk (optional) is a three-tier cache, which is used to cache all pages. Support content deduplication + automatic cleaning.

2. Non-blocking design: the whole process adopts thread non-blocking design, network asynchronous response + hard disk asynchronous read and write, calmly deal with high concurrency and high bandwidth environment.

3. Fragmentation-free design: non-fragmented memory management throughout the system, memory is re-segmented / paged / allocated / recycled, and the system never slows down / does not need to be restarted.

At the same time, Fikker also has the operational characteristics of cross-platform (Windows/Linux), green installation and deployment, decompressed and oriented to small and medium-sized user groups.

WDCDN

WDCDN is a set of CDN cache acceleration system and management system based on squid architecture, which is efficient, stable and secure. Can help large, small and medium-sized webmasters or large and medium-sized enterprises with low cost, fast and simple, build their own CDN network or server farm, provide professional CDN acceleration services or value-added services, better online services, faster networks and websites.

According to the media editor ZL, WDCDN is secure, stable and efficient. It can divide the node into lines, manage groups, and make it easier to manage the node server. WDCDN can be set for the site or specify the parent node / transit node, and it can also be set more flexibly according to the application requirements.

WDCDN fully supports pseudo-static, perfect solution to ID confusion, online shopping website login, shopping cart login and other problems, support hotlink protection settings, support setting domain name resolution back to origin, easy installation, one-click installation, execution of a script, can be completed.

Moreover, the centralized management of WDCDN enables the master to manage all node systems, including site management and update operations, system resource monitoring, etc., and can also set the file type and size of cache acceleration online, as well as the size of hard disk and memory, etc., and can regularly back up the database and upload it to the designated remote FTP server every day to ensure the security of the database.

CDNBEST

CDNBEST is a system developed by Nanchang Bangteng Technology Co., Ltd., and CDNBEST has the functions of high-speed cache, intelligent shunt, automatic fault monitoring and centralized control.

ZL added that the website performance is optimized through kangle web's caching mechanism and powerful access control functions, and the seamless connection with DNS can be combined with multi-line intelligent scheduling, fault monitoring, page optimization, page caching and other technologies, which can further improve the website access speed, reduce the failure rate, and thus enhance the overall user experience of the website.

Moreover, through the seamless connection between CDNBEST and DNS, you can operate your domain name resolution record in DNSdun through CDNBEST, and assign self-built CDN nodes according to line policies to access guest traffic to the nearest node according to its line characteristics. CDNBEST's efficient caching mechanism, CDN nodes will carry most of the guest traffic.

Not only that, with the seamless connection between CDNBEST and DNS, after CDNBEST is deployed, when a node fails, DNSdun's downtime detection feature will quickly switch the accessed traffic to the currently available node without affecting the visitor's request. Even if the source website is interrupted due to failure, because the CDN node caches the page and static resources, the search engine can still crawl the static page without affecting the normal access of users.

LuManager

LuManager (LUM) is a web server management software based on Linux system, which supports FreeBSD, Debian, Centos, Ubuntu, HttpOS and other Linux/Unix systems. It is one of the few web service management software that supports both Linux and Unix in the domestic market.

According to the media editor ZL, LuManager currently supports two installation methods: 1, source code compilation: this installation is troublesome and time-consuming, generally ranging from 20 minutes to an hour, depending on the configuration of the machine. 2, RPM package installation is simple and fast, download fast, it can be completed in a few minutes (editor recommends this method).

LuManager also integrates quick installation methods for commonly used programs. After installing LuManager, you can create a website within 5 seconds! The threshold for creating a website is greatly reduced. And the creation of LuManager is simple:

First log in to the LuManager background control panel and click "add website" to enter the domain name you want to bind. Then click the "optional" option, select "CDN site acceleration" in creating a special website, and fill in your source site domain name and the source site's IP address. Select "enable CDN normal cache" below. The default value of CDN cache file type is: html | htm | shtml | shtm | jpg | jpeg | png | swf | js | css | mp3 | doc | dot | xls | pdf | txt | zip | rar | gz | tgz | bz2 | tgz | rm | rmvb | ico. File types can be matched regularly. If set, you can see that the website CDN acceleration has been created successfully.

If there is anything else you don't understand, you can find our CDN technical engineer on the official website. CDN technical engineer has more than ten years of experience in the industry, so it will be more detailed and professional than the editor's answer. Official website link www.yisu.com

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