How to buy a virtual space)

What is a virtual space? I often hear webmasters ask in the group where is the virtual space good? Where is the performance of the virtual space good? Where is the virtual space cheaper? Virtual space is an important sales product in the IDC industry. It is also the most common website carrier for Chinese webmasters to build websites. Various data shows that the quality of virtual space can affect the operation and development of websites. The website construction Guide describes how to use virtual space and how to select a virtual space.

Q: What is a virtual space?

A: virtual space is also called a virtual host. Is to divide a server running on the Internet into multiple "virtual" servers, each VM has an independent domain name and a complete Internet server (supporting WWW, FTP, e-mail, and so on. Different virtual hosts on a server are independent of each other and managed by the user.

How can virtual space be distinguished? The website construction Guide provides several virtual space performance parameters to help identify the performance of a virtual space.

The first performance parameter of a virtual space is the CPU usage:

What is the CPU usage? The CPU usage can be simply understood as the maximum number of resources that can be used by the website in this virtual space. For example, if the virtual space server contains 50 virtual spaces and all 50 virtual spaces have websites running, the CPU usage of each virtual space can be simply understood as 100%/50 = 2%. Generally, the higher the usage of the virtual space, the less virtual space the server has, and the better the performance of the virtual space.

The second performance parameter of the virtual space is the number of concurrent IIS connections:

What is the number of concurrent IIS connections? The number of concurrent IIS connections is simply the number of personal accesses that the virtual space can accept within one period of time. Here are several examples of concurrent IIS connections in a virtual space:

User A downloads your files from a single point of time and is normally disconnected after the end. These connections are calculated in an instant. That is to say, your 50-person website can be instantly downloaded at 50 points at the same time.

User B opens your page, even if the page does not send any request to the server, it will be regarded as online within 10 minutes after the user opens the page, that is, you 50

People's websites can open 50 pages for different users within 10 minutes

C In the case of B above, the user continues to open other pages of the same website. The number of online users is calculated as 10 minutes after the last click (Send request ).

Within the clock, no matter how users click (including opening a new window), they are still online.

D. When an IFRAME exists in your page, every multiple frameworks will be online more than twice! This means that the user requests multiple pages to the server at the same time.

E. When the user opens the page and closes the browser normally, the number of online users will be cleared immediately.

What is the best option to limit the number of concurrent IIS connections in a virtual space?

To increase sales volume, some IDC operators claim that the number of IIS connections in the virtual space is not limited. This is obviously unscientific. Generally, servers with over 10000 connections are extremely unstable, I need to know that many virtual spaces share the same server. How can I limit the number of IIS connections?

The number of concurrent IIS connections in a virtual space is not limited, which is a kind of deception to users. It is also a marketing method of IDC operators.

The third performance parameter of a virtual space is traffic bandwidth:

The traffic bandwidth of a virtual space is usually set. To balance the bandwidth stability of the virtual space server, a maximum traffic bandwidth is usually set for each virtual space of the server, as if the maximum traffic is 100 kb at a time. This indicates that the total bandwidth used by the user to access the virtual space within one second is only 100 kb. Traffic bandwidth exactly describes the restrictions on the number of concurrent IIS connections for the second performance of the virtual space just now. Generally, the bandwidth of servers storing the virtual space in China is 100 m, 10 m, or 5 m, even if you have no restrictions on the number of concurrent IIS connections and the traffic bandwidth limit, the access speed will also slow down, reducing the user experience.

Traffic bandwidth there is also a concept of total traffic bandwidth. Some virtual spaces will calculate the total traffic of the virtual space for one month. When the limit is reached, access will be denied, and virtual space users are required to purchase the bandwidth this month to continue using it.

The fourth performance parameter of a virtual space is the file type that supports the virtual space:

Whether a virtual space only supports HTML, ASP, Asp.net, PHP, JSP, CGI, and so on.

Generally, there are three types of virtual space in China: ASP virtual space, PHP virtual space, or virtual space that supports ASP/PHP at the same time.

ASP virtual space is generally, HTML + ASP with access database or MSSQL database.

PHP virtual space is generally, HTML + PHP with MySQL database.

The fifth performance parameter of a virtual space is the support component:

Generally, an IDC operator configures a virtual space server and adjusts the server components based on the performance, usage range, and security of the server hardware. Generally, all virtual space servers support the following components, jmail components, FSO components, mobile components, Zend, GD library, rar online decompression and packaging, etc.

The sixth performance parameter of a virtual space is the support for directory websites:

A directory website indicates how many sites can be opened in a virtual space and provides better performance, you can bind domain name to a folder in a virtual space to set some parameters for a subsite to directly access the subfolder of the website through the domain name.

The seventh performance parameter of a virtual space is single-line access, dual-line access, and three-line access:

What is single-line access, dual-line access, and three-line access? After the splitting of China Telecom Netcom, due to competition and various lines, the speed for telecom users to access the server of China Netcom is very slow, and the same is true for China Netcom. This is why many websites that provide download and online games provide interfaces for China Telecom and China Netcom respectively. It is important for service providers to enable dual-line access to your website to ensure high-speed access throughout the country. However, there are not many domestic dual-line access providers.

The eighth reference factor for a virtual space is the IDC license:

In the IDC industry in China, it is generally divided into two factions: The license delivery and the unlicensed delivery. The licensed IDC is a legal IDC with a business license and sound legal procedures in all countries. Without a license, it is a cottage version. without formal procedures, you can rent a server and use a virtual space program to sell space. Generally, licensed virtual space is expensive and unlicensed virtual space is very cheap. The after-sales service of the licensed IDC has a certain credibility. The after-sales service of the unlicensed IDC depends on the operator's moral level. I believe that many grass-roots Webmasters have used the virtual space released by the IDCs without a license on webmasters forums, and the effect has been quite impressive.

The above are the opinions of the website construction guide on virtual space purchase and selection. I hope you will have a clear reference and comparison when purchasing a virtual space and selecting a virtual space IDC in the future.