Global Data Server Distribution Analysis: Optimizing Crawling Efficiency

This server distribution thing affects crawlers more than you think.

搞过数据抓取的都懂，明明代码没问题，速度就是上不去。有次帮朋友抓电商价格，欧洲站点死活加载不出来，换成东南亚IP秒开——后来才整明白，目标网站的服务器在欧洲机房，物理距离导致爆炸。这就好比你在北京点广州的外卖，等送到都凉透了。

Three major potholes in global server distribution:①物理距离产生 ②区域限制拦截请求 ③机房防火特别敏感The actual test of a footwear comparison platform last year was that the success rate of using a local IP to catch US data was only 32%. Last year, a footwear price comparison platform test, with local IP to catch the U.S. data success rate of only 32%, change on the city agent directly soared to 89%.

Choosing a proxy IP is not opening a blind box, you have to look at the hard indicators.

There are many proxy service providers in the market, but 90% all existInflated survival rates, speed flooding, poor geographic coverageThe problem. Last week test a certain service provider claiming to cover 60 countries, the actual can be used in less than 20 areas. Here are three tricks to teach you the actual testing method:

1. 用ping命令测基础（别信后台数据）
2. Bulk request test IP survival rate
3. Switching different protocols for adaptability

Take ipipgo's residential proxies for example, each of their IP pools is labeledMeasured Response TimeThe key is that it supports socks5 and http dual protocols, which makes it more flexible to deal with various anti-climbing mechanisms. The key is to support socks5 and http dual protocol, against a variety of anti-climbing mechanism more flexible.

Dynamic scheduling is the way to go, sticking to one IP will be blocked.

Seen too many people treating proxy IPs as disposable, in factrotation strategyMore important than IP quality. There is a customer who does airfare comparison, started to change 1 IP every hour, as usual, triggered the wind control. Later changed to ipipgo's intelligent scheduling mode.Dynamic switching based on access frequency + simulation of real-life operation intervals, the success rate is directly doubled.

Two practical options are recommended:
Scenario A: IP change every 50 requests + random delay 1-3 seconds
Option B: automatically switch according to the target site response code, encounter 403 immediately change the IP address

The White Guy's Guide to Avoiding the Pit (QA Time)

Q: Why did you use a proxy and still get banned?
A: The probability is that the IP purity problem, detect whether the proxy exposed the real exit. ipipgo's proxy with two-way authentication, will not disclose the information of the machine.

Q: What if I need to capture data from multiple countries at the same time?
A: Don't cut the IP manually! Use their global scheduling API, set up a list of target countries to be assigned automatically, and also automatically optimize routes based on the success rate of each region.

Q: What's happening when nighttime acquisition slows down?
A：可能是共享代理被挤爆，换独享IP池试试。ipipgo的商务套餐支持独占通道，晚上12点实测德国节点也就190ms。

final words

Proxy IP used well, crawler efficiency doubled is not blowing. The key is to find the right service provider, like ipipgo this kind of canReal-time updating of IP librariesThe is really reliable. Last week, they just added a new African node, and now even Egypt's e-commerce data can be stabilized to catch. Remember not to choose a free agent for cheap, the risk of being blocked can be much more expensive than the agent's fee.