Shulou(Shulou.com)06/02 Report--

Bandwidth is one of the key factors that affect the speed of server access, especially for websites with a large number of visits, the amount of bandwidth becomes very important. In the final analysis, traffic is the accumulation of bandwidth in time, which, in mathematical terms, is the integral of bandwidth to unit time.

To make a simple analogy, in the case of tap water, the bandwidth is only the velocity of the pipe, and the flow rate is the total amount of water flowing out of the pipe. Because bandwidth traffic is important to server hosting or leasing, you should have a comprehensive understanding of this concept before choosing a server, otherwise it is easy to be deceived by server vendors. Here are some of the most common misunderstandings about bandwidth

one。 The two most confusing units: bytes and bits

When it comes to bandwidth, it will involve the unit of bandwidth. Bandwidth is usually measured in bits. In English, it is bit. For example, the bandwidth of adsl is 2mb, which in fact means 2mbit per second. In front of the M, there is also the corresponding KGrady G we have generally met, representing the order of magnitude, the base is 1024, the calculation can also be easily replaced with 1000. That is, people who use computers in 1G=1024M?1M=1024K are usually familiar with this concept, for example, my disk is 100G.

So what does 100g stand for? It's actually 100GByte, which is 100G bits, so we know that this kind of 2mb is different from the kind mentioned earlier. Relationship between bits and bits: 1byte=8bit. When abbreviated, these two are both b. It is customary for byte to use uppercase B and bit to use lowercase b, but most of the time the writing is very messy, so when you see the bandwidth of the server logo, you have to know whether it is byte or bit. Generally speaking, the bandwidth of the computer room and the server port are all about bit, but individual servers will limit the peak bandwidth. Some of these servers are commercial byte or bit, with a distance of 8 times, so you need to figure it out first. If you need server rental or hosting, please consult or visit-QQ: 314394634

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two。 The difference between sharing and exclusive enjoyment

This kind of virtual server is usually not mentioned, basically it will be mentioned when the server is leased and hosted, because the virtual server must in principle share the bandwidth of the same server, there is no exclusive. The virtual server is separated from a whole platform, so it is still important to know the bandwidth status of the server. 100m sharing and 10m exclusive are common in China. 100m sharing actually refers to a cabinet sharing a 100m port. How much bandwidth can be allocated to each server depends on the number of servers in this cabinet and the specific bandwidth usage of each server. And 10m exclusive, that is, give each server a 10m port. Generally speaking, 100m sharing can basically get about 2m to 5m of bandwidth per server, so 10m exclusive is better than 100m sharing.

Most of the servers used in domestic virtual servers are shared by 100m, and there are a few 10m exclusive servers. But if someone says that his server is exclusive to 100m, you should be careful, the suspicion of deceiving people is very big. ? In addition to the above, in fact, the bandwidth that can be allocated to a server also depends on whether the bandwidth of the whole computer room is adequate. 10m exclusive or 100m exclusive is actually just 10m port or 100m port connected to the switch, for example, if the computer room gives you a 100m port, but the computer room to the exit of the public network actually has only 10m, then in fact your maximum bandwidth is only 10m.

At this level, 100m exclusive is actually shared, not connecting your exit to the backbone. On a larger level, if it is a backbone network congestion, even if you are given 1G port to connect to the backbone network, the bandwidth will still be limited. Therefore, exclusive and sharing is actually a relative concept.

In general, if the exit bandwidth of a computer room is 10G, the bandwidth and value assigned to a specific server or cabinet will be greater than this value, that is, the so-called oversold. If it is not oversold, 10g of bandwidth can only be allocated to 100 100 m shared cabinets. Because not every server has to be full of bandwidth every moment, overselling will make more full use of resources. The bandwidth of the virtual server is similar to that of other resources, and it will also be oversold, but as long as it is reasonable, it is beneficial to both customers and server providers.

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