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

This article mainly explains "what is a distributed crawler". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is a distributed crawler".

The era of big data has come, accompanied by the spring of reptiles.

1. Distributed crawler means that multiple computers install crawler programs, share queues and remove duplicates, so that multiple crawlers do not crawl the content crawled by other crawlers, so as to realize joint collection.

When we do crawler business, we are often blocked by the anti-crawler mechanism of the target website, especially the distributed crawler. Because the speed of collecting information and collecting is too fast, it often brings a huge load to the other server, so we don't have to guess to know that you are a crawler. How can it be blocked? To solve this problem, using proxy ip is undoubtedly a shortcut. In the case of blocking IP, you can continue to access it by changing IP.

2. In order to ensure the quality of SEO, the new website first adds a little bit of content, but in the face of a large amount of filling, it is really time-consuming and laborious, so many webmasters use distributed crawlers to crawl information on the new website to ensure that the site is updated regularly.

Distributed crawler can be literally understood as cluster crawler, if there is a crawler task, it can run with multiple machines at the same time, which greatly improves the efficiency of the job.

However, distributed crawlers are not done once and for all, and while improving efficiency, the probability of triggering website anti-crawlers will be greatly improved. To ensure the smooth use of distributed crawlers, it is very important to have a http agent ip resource with a large number of IP and good quality, which can save manpower and reduce cost with twice the result with half the effort.

With the popularization of information technology in the medical industry, medical and health data are growing geometrically. It is under this background that medical and health institutions have established a huge electronic health record system. Health archives run through the life cycle of human beings, and are of great significance for studying and analyzing the influencing factors of diseases and improving people's health level. By using Python crawler, a large amount of web page information can be obtained quickly and accurately, and the data can be updated in real time. However, when crawling information, crawlers often encounter the anti-crawling mechanism of the website. Using HTTP proxy IP with Python crawler is considered to be a breakthrough method with high performance-to-price ratio.

Thank you for your reading, the above is the content of "what is a distributed crawler", after the study of this article, I believe you have a deeper understanding of what is a distributed crawler, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.