Choose high quality virtual space from eight aspects

Http://www.aliyun.com/zixun/aggregation/14840.html "> Virtual host" is the use of special hardware and software technology, a computer mainframe into a platform "Virtual" hosts, each with a separate domain name and IP address (or shared IP address), with full Internet server functionality. In the same hardware, the same operating system, running for multiple users to open different server programs, and each user has its own part of the system resources (IP address, file storage space, memory, CPU time, etc.). Virtual host is completely independent, in the view of the outside world, each virtual host and a stand-alone host performance exactly the same.

The advent of virtual host technology is an important contribution to Internet technology, is the Gospel of the vast number of Internet users. Because more than one virtual host to share a real host of resources, each user to bear the hardware costs, network maintenance costs, the cost of communication lines are greatly reduced, the Internet really become affordable by everyone network! Now, almost all American companies, including some families, have set up their own web servers on the Internet, and some of them are using virtual hosts!

Some companies will buy their own servers, host hosting, or server rental, that is, the cost of their own server (a better computer) in Netcom, telecommunications, such as the communications Unit, so that people all over the world can access your computer.

Choose a good virtual space for you webmaster Friends is very important things, if you choose a good virtual space? From my point of view, there are a lot of attention.

Words do not say, directly into the theme, the purchase of virtual space first depends on the CPU occupancy rate, is the virtual space in the Web site can occupy CPU resources such as the maximum limit. For example: If the virtual space server contains 50 virtual spaces, 50 virtual spaces have Web sites running, each virtual space CPU occupancy rate can be simply understood as 100%/50=2%, the general virtual space occupancy rate is higher, indicating that the less virtual space of the server, the better the performance of virtual space.

Second, the number of IIS concurrent connections is the number of personal accesses that can be accepted for this virtual space within 1 time periods. Briefly cite several examples of IIS concurrent connections:

Example 1, the user to download the single point of your files, after the normal disconnect, these connections are calculated in an instant, that is to say you 50 people's site can be accepted at the same time 50 point download.

Example 2, users open your page, even if you stay on the page does not make any request to the server, then the user opened a side of the next 10 minutes will also be counted as an online, that is to say that you 50 people's Web site 10 minutes to accept different users open 50 pages.

Example 3, the second situation above the user continues to open the other pages of the same site, then the number of online users in accordance with the user's last click (issued a request) after the 10-minute calculation, in this 10 minutes no matter how users click (Including new window to open) is still a person online.

Example 4, when your page has a frame (Iframe), then each more frame will be one more times online! Because this is equivalent to a user requesting multiple pages at the same time.

Example 5, when the user opens the page and then closes the browser normally, the number of users online will be cleared immediately.

Is that the best thing about not restricting IIS? Obviously this is also unscientific, the general server in the number of connections more than 10,000 is extremely unstable, you need to know that many virtual space is shared with this server, So the virtual space IIS concurrent connection number is not limited to the user is a kind of deception, but also the IDC operator of a marketing tool.