Recently to help friends deal with an overseas access card into the PPT site, open the home page to more than 10 seconds, the user turnover rate directly soared to 70%. I look at the background, good guy, the source is a certain Southeast Asian nodes can not even get together the CDN, these days there are actually people who dare to do cross-border business with this service provider.<\/p>\n
Overseas access speed is actually the essence of the problem of three: physical distance caused by the delay, multinational operators between the routing jump, and the local network quality. Do you think you can buy a CDN and everything will be fine? Many vendors of overseas nodes are simply renting the second-hand traffickers servers, the quality of the bandwidth is not as good as your own server room to pull the dedicated line.<\/p>\n
The highest latency I've found in real life can be 800ms or more, and it's no longer a matter of internet speed but of the laws of physics. The speed of light travels at the limit of latency there, unless you can stick a server in a user's pocket.<\/p>\n
A real professional high defense CDN should play Anycast+unilateral acceleration like CDN5, and control the latency within 150ms by global scheduling. I've tested their South American nodes, and the latency from Brazil to Chile can actually be pressed down to 90ms, which is simply not something ordinary CDNs can do.<\/p>\n
Intelligent routing is the real technical barrier. Others may simply do DNS resolution, but a service provider of the level of CDN07 monitors global network congestion in real time and automatically switches the optimal path. Once Singapore Telecom backbone network blew up, our business actually automatically cut to the Japanese node and then bypassed the United States, the user is completely unaware.<\/p>\n
Configuration examples are where you'll see the real deal. Many vendors give a CNAME record and that's it, the real optimization goes down to the protocol layer:<\/p>\n
08Host's configuration background directly provides this level of tuning templates, but also for the mobile end to do special optimization. Their Western European nodes for cellular networks do TCP acceleration, measured 4G environment first screen load can be faster 40%.<\/p>\n
Don't believe the hype about 'global nodes'. Some vendors include VPS nodes, but the actual performance is not even as good as a virtual machine. A truly valuable node must meet the following requirements: Tier 3 or higher server room, BGP broadcasting capability, and direct connection to local carriers. Like CDN5 in Southeast Asia directly and SingTel\/KDDI to build a direct line, which is a real investment.<\/p>\n
Security and speed are never opposites. A customer was attacked by DDoS before, and the ordinary CDN was directly pierced. Later migrated to the intelligent routing solution with WAF, not only was the attack mitigated, but normal access speed was increased 20%. the principle is simple: after the cleaning center filters the malicious traffic, the legitimate traffic is returned to the source through the optimized path.<\/p>\n
The data comparison is most telling. Our performance metrics after migrating to a hybrid solution last year:<\/p>\n
These enhancements are directly reflected in the business data: the shopping cart abandonment rate was reduced by 34%, and the length of user stay increased by 2.8 times. A cross-border e-commerce company even earned more than 2 million dollars more during Black Friday because of the loading speed improvement.<\/p>\n
Even CDNs are now \"teammate-proof\". Some vendors will cache your static resources to the cheap room, the surface of the cost savings, the actual user experience sucks through the heart of the earth. Be sure to specify the SLA terms in the contract, mandating that the core business go to a high-quality node.<\/p>\n
Some business scenarios require targeted programs. For example, the game industry needs TCP acceleration, the video station needs QUIC support, and the financial business has to take into account the security and latency. 08Host has recently launched a financial grade acceleration program, and can even achieve cross-border transaction latency of less than 100ms.<\/p>\n
Technology is iterating faster than expected. Leading intelligent routing systems are now using machine learning to predict network congestion and schedule traffic in advance. The new version of CDN07 is said to be able to predict routing jitter 300 milliseconds in advance, which is enough time to complete three full-link switches.<\/p>\n
The actual deployment had so many potholes that you could trip over an elephant. One time I forgot to exclude dynamic interfaces when configuring caching rules, resulting in users always seeing data from an hour ago. Now we all use a layered caching strategy:<\/p>\n
The most exaggerated is to have encountered DNS pollution leading to the failure of intelligent routing. Later, we were forced to build our own authoritative DNS servers, and use the EDNS Client Subnet function to pass the user's IP to the CDN, which really realizes accurate scheduling.<\/p>\n
Looking back now, overseas access optimization is a systematic project. From node quality to protocol optimization, from security protection to operation and maintenance details, each link can dig out the performance potential. Sometimes changing the TCP congestion control algorithm can bring 15% improvement, which is much more cost-effective than simply adding bandwidth.<\/p>\n
As industry veterans know, there is no one-size-fits-all solution. German users and American users need completely different optimization strategies, and the network environments in Southeast Asia and South America are even more different. A good service provider should be like CDN5 to provide regional customized solutions, rather than a set of configurations for global use.<\/p>\n
On an offending note: 90% CDN vendors don't know anything about acceleration. They just throw caching servers in the server room and collect money. A truly effective acceleration solution has to do global optimization in conjunction with network topology, transport protocols, and content types, which requires engineers who really understand how data runs circles around the globe.<\/p>\n
Recently, when I helped a news station to do globalization deployment, I found a mysterious problem: the same node configuration, in the Asia-Pacific region has excellent performance, but in Eastern Europe, the performance plummeted. In the end, it was found to be a MTU setting problem, and the default value of the local operator was only 1400. this kind of pit could not have been imagined without stepping on it.<\/p>\n
If I were to design an overseas acceleration program, I would give priority to a three-tier architecture: edge nodes to handle static resources, regional center nodes for dynamic content acceleration, and a global dispatch center for intelligent routing. The security level should integrate DDoS cleaning, WAF, and Bot protection, and the current stand-alone protection program can't prevent advanced attacks at all.<\/p>\n
Tested so many service providers, dare to say can really do a good job at the same time acceleration and protection of not more than five. CDN5 Anycast network is really stable, CDN07 intelligent routing algorithms leading the industry, 08Host price-performance ratio is unbeatable. Other vendors either node quality varies, or technical architecture is still stuck in five years ago.<\/p>\n
Finally, to give a lesson in tears: do not choose a cheap program in order to save money. A customer once chose a small vendor to save 30% costs, the result of the business outbreak period directly all downtime, the loss is enough to buy ten years of top services. Now their SLA requirements are directly written in the \"must use Tier 1 server room, and single node failure does not affect the overall situation.<\/p>\n
Technology is something that cannot be faked. The number of nodes can be falsely labeled, delay data can be faked, but the actual user experience will not lie. When your overseas users start to praise \"this Chinese website is actually not stuck\", that is the real measure of the success of the program.<\/p>","protected":false},"excerpt":{"rendered":"
Recently helped a friend to deal with an overseas access card into the PPT site, open the home page to more than 10 seconds, the user turnover rate directly soared to 70%. I look at the background, good guy, the source is a certain Southeast Asian nodes can not even get together the CDN, these days there are actually people who dare to do cross-border business with this service provider. Overseas access speed of the essence of the problem is actually three: physical distance caused by the delay, cross-border operators between the routing jump, as well as the quality of the local network. Do you think you can buy a CDN and everything will be fine? Many vendors of overseas nodes are simply renting the second-hand traffickers servers, the quality of the bandwidth is not as good as your own server room to pull the dedicated line. I found that the highest latency to 800ms or more, which is not a problem of network speed but the laws of physics. The speed of light propagation limit latency is there, unless you can put the<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"gallery","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[150],"tags":[],"collection":[],"class_list":["post-905","post","type-post","status-publish","format-gallery","hentry","category-updates","post_format-post-format-gallery"],"_links":{"self":[{"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/posts\/905","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/comments?post=905"}],"version-history":[{"count":1,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/posts\/905\/revisions"}],"predecessor-version":[{"id":1218,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/posts\/905\/revisions\/1218"}],"wp:attachment":[{"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/media?parent=905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/categories?post=905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/tags?post=905"},{"taxonomy":"collection","embeddable":true,"href":"https:\/\/www.ddosgj.com\/en\/wp-json\/wp\/v2\/collection?post=905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}