Although I have always believed that ping value is not the only criterion that represents speed, many friends still regard ping value as a god. Moreover, many friends recently asked me through online QQ: Is there a 50ms ping value in the United States? Why did XX give me a US-hosted website with only **ms, etc., etc., which gave me the urge to summarize previous articles. The content involved in this article is partly collected from the Internet. Since there are too many sources to list them all, I would like to express my thanks here.
Before talking about the ping value, let's take a look at the status of China-US network .
China-US network transmission relies on optical cables spanning more than 10,000 kilometers of the vast Pacific Ocean. There are currently two direct submarine optical cables between China and the United States. One is the China-US Cable Network, with a network capacity of 80Gbps. The landing points in mainland China are Chongming Island and Shantou, Shanghai, and the landing points in the United States are San Luis Obispo in California (located between San Jose and Los Angeles). between). There is also the famous Trans Pacific Cable, with a design capacity of an astonishing 5.12Tbps. The mainland landing points are Shanghai (China Telecom) and Qingdao (China Unicom), and the U.S. landing point is Nedonna Beach in Oregon. Both optical cables have been put into commercial use, but judging from the summary of experts on the Internet, it seems that TPE has not yet been opened to general broadband users. Currently, China Telecom’s nodes on the West Coast of North America include Seattle, Washington, San Jose, Los Angeles and Palaia, California. picture.
Now that we understand the route of network data from China to the United States, let’s take a look at the data trend. The route taken by telecom/Netcom users to access US sites for network data transmission is first the local ISP network, then the metropolitan area network, then network nodes in various provinces and cities, then the backbone network, and finally exits from Shanghai and other exits, and crosses the Pacific Ocean in California, USA/ Oregon Landing. The one-way data delay of the China-U.S. backbone network is ≈60ms. Therefore, after going back and forth like this, the theoretical delay value of data transmission for Chinese users accessing the U.S. host is higher than 120ms! Of course, what I refer to here is the theoretical value of directly exporting to the US entrance and then returning to the original route. Our data is in the domestic ISP, metropolitan area network, and then to the export. I have not included it. Calculated based on the delay of my ping Baidu here = 36ms. For end users, the ping value of the nearest computer room at the US port of Sino-US data should be higher than 150ms. This is a theoretical value. Due to other reasons of line loss, ping values are often above 200ms.
We all know that optical cables land from California on the West Coast of the United States, so the computer room on the West Coast of the United States is undoubtedly the area with the lowest ping value. There are three main areas with the highest concentration of computer labs in California: San Jose, Fremont and Los Angeles. Among them, San Jose and Fremont are both located in the Bay Area, which is the entrance to Silicon Valley. The computer rooms in San Jose and Fremont include our common T2, Peer1, Equinix and Hurricane Electric; while the Los Angeles computer room includes PR, WebNX, and Peer1. And 84 (Burst), which we often talk about, also has its own computer room in Los Angeles.
Some friends may have questions. Does the above content indicate that the host or VPS on the West Coast of the United States is the fastest? Not really. Because of these special national conditions #￥%&**&%@@ (omitting 10,000 words here), and the Chinese people’s lively nature, the draft condition of some computer room lines is extremely bad. At this time, we might as well take a closer look Further afield, such as Dallas, Chicago, Seattle, Scranton, Kansas, etc. Dallas is located in the south-central part of the United States. With this geographical location, the distance to all parts of the United States, South America, and Europe is very moderate; Chicago is originally a hub of east-west, north-south transportation in the United States. Connecting to Chicago from the West Coast generally only needs to pass through the Denver node; Seattle is located in In the northwest United States, there is an optical cable directly connected to Seattle from San Jose; the 84 we are familiar with has the Scranton computer room. I have an IP here: 184.22.83.33, the ping value is about 210ms, and the sites on it are also accessible quickly. Most importantly, these areas are often not as popular as popular areas on the West Coast. I personally think that it is more tragic that the website cannot be opened than that it is slightly slower to open.
Speaking of central city computer rooms, let’s talk about the issue of ping value. 1 second is equal to 1000 milliseconds, so how much can we feel the difference between 200ms and 300ms? Therefore, I generally think that anything below 350ms that is stable and does not lose packets is very good.
In fact, many hosting providers on the Internet use load balancing and CDN to solve the ping value problem, which seems very comfortable. Even hosts as far away as Europe can achieve a ping value of less than 80ms. Regarding CDN, I have also tried it. After using a domestic CDN, the ping value of all American hosts was below 100ms, but the speed did not improve significantly, but it did seem a lot better! Below, I quote a simple solution for "cloud" technology from the hero "Captain" of the global host exchange forum. The following original quote:
vr.org, the bandwidth is transparently transmitted from China. Everyone, the cost is about one-half of Linode Tokyo, and the packet loss rate is almost one-third to one-half of Linode's packet loss rate. And this packet loss It is also caused by DDoS. The firewall of the line is in China, but there is no firewall in Hong Kong. TCP semi-links and ACK packets have been filtered out by default
he.net has always been very stable in coastal areas of China. You can buy it directly from EGI or the official website. The official website has an additional setup fee, and IP is unlimited and free. You can choose It's very cheap to buy a machine from EBAY and send it to be hosted
bust, the west coast is cheap, and the bandwidth is very limited. He co nl has nothing to say. The only advantage is that it's cheap
vps.net. . . It’s still cheap, in Tokyo
Then there is a free DNS for downtime detection, this http://www.webluker.com/ can have
and then a squid or nginx or varnish
and then you can sell it.” "Yun"
Um, that’s right. . . Don’t worry about not having an automated sales system. . . ZKEY is a good fit. . .
It is also very cheap
And if you want to be more comfortable
Vietnam Post and South Korea VPS will add 2 points. . .
In addition, for DNS outage detection, the switching time depends on the ttl setting.
