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This article introduces the relevant knowledge of "how to choose the bandwidth in the process of VPS purchase". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

If you've made up your mind to run a website or become a full-time webmaster, then a web host is obviously not your best partner, and VPS may be more suitable for you. For most people, switching from a virtual host to VPS is not an easy process. VPS has more permissions, which also means more trouble, whether it is purchase, management, or maintenance, which is more difficult than using a virtual host.

Although using VPS can be troublesome, VPS is a little more secure and stable than a virtual host, and it's worth spending some time learning to use VPS. Now there are few IDC who don't cheat, either cheat you, or cheat others, do not keep an eye, it is easy to be deceived. Choose VPS, in addition to looking at memory, CPU, hard disk and other intuitive information, but also pay attention to the following details that are easy to be ignored.

Basic knowledge of network bandwidth

The purchase of VPS and stand-alone servers will involve a problem of network bandwidth provided by service providers.

Several concepts that are easy to be confused: Mbps, Mb/s, MB/s.

1. We often hear that the server access bandwidth provided by so-and-so IDC is 10m exclusive, or 100m shared and so on. What exactly is the concept of 10m and 100m here?

The so-called 10m bandwidth actually refers to 10Mbps (megabit), that is, 1.25MB/s, but this is only the theoretical speed, in fact, it has to subtract the loss. According to this statement, the fastest download speed for 10m bandwidth is 1.25MB, and the fastest download speed for 100m bandwidth is 12.5MB/s.

2. We came into contact with MB/s above, so what's the difference between MB/s and Mb/s?

MB/s means megabytes per second, and Mb/s means megabits per second, the former refers to the number of bytes per second transmitted, and the latter refers to the number of bits transmitted per second. The two are completely different. Byte is the number of bytes, bit is the number of bits, in the computer every eight bits is a byte, that is, 1Byte=8bit, is the 1:8 correspondence. So 1MB/s equals 8Mb/s. Therefore, when writing units, we must pay attention to the case of the B letter. At this time, the size of the B letter can really be called a mistake.

In terms of data transfer rate, Mb/s or Kb/s is generally used in official data (such as the telecommunications sector).

And download software (such as IE, Thunder, Express) generally use MB/s or KB/s as the unit.

3. Test the software or website

The Frontier of the Century: http://benchmark.avl.com.cn/ Test Software: http://benchmark.avl.com.cn/cab/avltool.exe

World Network: http://www.linkwan.com/gb/broadmeter/SpeedAuto/

Does the PING value mean the network speed?

Many IDC provide VPS along with the corresponding test IP. What is the test IP used for? Of course, it is for everyone to test the PING value, and the ping value can reflect the advantages and disadvantages of the server network environment to a certain extent. As a result, many profiteers will provide IP with a very good ping value to everyone. When we see that the pin value is very good, they think that the network speed is very good. In fact, this is very easy to be deceived.

The PING value reflects the time for the user to connect to the server, and can only reflect the response of the current IP server, not the load of the server. A server carrying a high load and a server carrying a light load may respond to a ping value similar to that of a light load, but the access speed will vary greatly, especially for dynamic websites.

Shared or peak bandwidth?

Bandwidth is one of the most important indicators of VPS. Many netizens report that the speed of VPS is not better than that of virtual hosts, mainly because the bandwidth of VPS is too small, 2m bandwidth, and there are many people, so the speed of opening the website is naturally very slow, while virtual hosts share bandwidth, or charge by traffic, and the opening speed can easily exceed that of VPS with low bandwidth. Therefore, instead of choosing a low-bandwidth VPS, it is better to continue to use virtual hosts.

Since bandwidth is an important indicator of VPS, and the greater the bandwidth, the better the speed, many profiteers will use numbers to fool everyone, such as sharing 100m bandwidth, or how many megabytes at the peak. In fact, whether it's sharing or peak, the implied condition is that your bandwidth is unstable, it may be good at some times, it may be bad at some times, such as 100m sharing, or 5m peak, it may be that you can only use 3m all the time, you ask profiteers, profiteers will tell you that this is what you share, and there is no guarantee that you will reach the peak at any time. When choosing VPS, it is best to choose exclusive, even if the exclusive bandwidth is relatively small, at least to ensure stability.

Bandwidth and Speed issu

The so-called 1m bandwidth actually refers to 1Mbps (megabits per second), that is, 1 x 1024 / 8 = 128KB/s, but this is only the speed in theory, but in practice, it is necessary to deduct about 12% of the information header identification and other control signals, so the upper limit of its transmission speed should be about 112KB/s. B and b stand for Bytes and bits respectively. The definitions of the two are different, so don't be confused.

Therefore, the limit download value of all kinds of broadband can also be easily calculated.

1m = 112KB/s 2m = 225KB/s 8M = 901KB/s 10m = 1126 KB/s Mbps is actually a unit of bandwidth, not a unit of speed. The "b" in the "Mbps" unit means "Bit". The real unit of speed should be MB/s, where "B" means "Byte". Because the data is transmitted by bytes, not by bits.

Because of these two different uppercase and lowercase "B" and "b", the two units are not only not the same, but also very different. Of course, there is a big correlation between them, that is, 1MB/s=8Mbps, it can be understood that the port bandwidth is the theoretical maximum transmission speed of the port, but in practice the speed is much less than the bandwidth value (usually between 60 and 80%).

Network bandwidth, also known as bandwidth, refers to the amount of data that can be transmitted in a fixed period of time, that is, the ability to transmit data in the transmission pipeline. In digital devices, the bandwidth is usually expressed in bps, that is, the number of bits that can be transmitted per second. In analog equipment, the bandwidth is usually expressed in terms of transmission cycles per second or Hertz Hz. Bandwidth is particularly important for basic input output system (BIOS) devices, such as fast disk drives that are hampered by low-frequency wide buses.

In particular, the bandwidth of overseas IDC computer rooms is generally divided into local bandwidth and international bandwidth, local broadband, as the name implies, refers to the bandwidth of the region where the IDC room is located (although Hong Kong and Taiwan belong to China, but from Chinese mainland to Hong Kong and Taiwan all belong to international bandwidth). At present, the local bandwidth in Hong Kong and Taiwan is 100m, regardless of exclusive and shared, similar to the meaning of LAN optical fiber Internet access in our community. But a local, it belongs to the international bandwidth, even to Chinese mainland, also belongs to the international. Some IDC promises to give users exclusive access to several megabytes, which are disclosed by people familiar with the matter. However, most of the users are in the mainland, and how much bandwidth there is in Hong Kong has nothing to do with mainland users. The key lies in the bandwidth from the mainland to Hong Kong, that is, the international bandwidth, and the so-called point-to-point bandwidth. The price of this section of international bandwidth is relatively expensive and cannot be compared with the price of local bandwidth. For example, the network signed by home and local telecom, 2m 900RMB a year, while the international bandwidth 2m costs thousands of yuan a month.

So how to test the bandwidth and speed of the computer room?

At present, the domestic IDC market is developing rapidly, and all kinds of virtual IDC operators are springing up like bamboo shoots after a spring rain. No matter how good the bandwidth is and how fast the IDC is, there are actually a lot of misunderstandings.

You can use the ping value to observe the response speed from the local to the target server. The PING method is either the target IP or the domain name. Start menu-> run-> enter CMD-> enter "ping www.tsingpost.com" in the DOS interface. In a high-speed data center, the packet loss rate should not exceed 1%. It is best that none of the 1000 ping is lost. This is ideal, but this is not an absolute value. As long as it is less than 1%, it is a good routing situation. Secondly, the ping value should be small, the average adsl ping of telecom in the same city must not exceed 20, generally 10, and the average ping of overseas such as Hong Kong and Taiwan should be 20-40 is normal. The third point is that the ping value should be uniform, large and small, and the size gap of less than 100 is a sign of routing instability.

At the same time, the test route tracert router is to see how many routers it takes for the test point to reach the target server, and you can tell which router is slow according to the millisecond number of each route, and you can see which ip belongs to that operator, or even the operator of that province and city, so it is clear at a glance.

Let's take a look at how users test their own servers and how much bandwidth is allocated by IDC.

There are also two testing methods: first: install DU software on the server and pay attention to your server bandwidth usage in real time. Whether the number of uploads and downloads is within the normal range; second: using FTP on the server, pull a file with larger capacity, and you can see how much K the peak value is.

Fourth-line BGP computer room?

As mentioned above, bandwidth is a very important indicator of VPS, and exclusive bandwidth is naturally the best. However, bandwidth does not necessarily mean good network speed. If you want to achieve a more balanced and high quality network speed, then the computer room is the key. As long as they sell VPS, they usually emphasize that their computer room is very good. For example, it is now popular for BGP multi-line access. No matter what IDC it is, it will use BGP computer room as a slogan for publicity.

So, is the computer room really that important? Is the fourth-line BGP computer room very good? As far as the domestic computer room environment is concerned, the two-line or multi-line computer rooms in Beijing, Shanghai, Guangdong and Zhengzhou are indeed very good; however, a good computer room does not necessarily mean that your VPS speed is good, it also depends on bandwidth, memory, service load, etc., a server opens 10 VPS, the speed will be good, open 30 VPS, almost the server can not live, how to provide good speed. Therefore, do not be too excited to see the introduction of the computer room, but also pay attention to the configuration of VPS.

This is the end of the content of "how to choose the bandwidth in the process of purchasing VPS". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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