Baiduspider translates to spider and is an automated program for search engines. Its role is to access and collect web pages on the Internet, ** and other content, and then classify and build an index database, so that users can search for your ** web pages in the search engine, so how does BaiduSpider work?
First of all, if Baidu Spider wants to crawl the web page, it must first discover the entrance of the crawl, and then Spider analyzes and crawls along the URL of the entrance, which involves the problem of crawling strategy.
Here's how Baidu Spider works:
1. BaiduSpider crawls the web page according to certain rules, and the spider crawls from one page to another along the internal links in the web page, and crawls continuously through link analysis to crawl more pages. After the spider crawls the web page, it is necessary to extract keywords, establish indexes, and analyze whether the content is duplicated, judge the quality of the web page, and the trust of the web page. After the analysis is completed, only those who meet the requirements can provide search services.
2. BaiduSpider will put the ** back web page into the supplementary data area, and then put it in the retrieval area after calculating through various programs, so it will form a stable ranking, so as long as the ** back things can be found through the instructions, the supplementary data is unstable, it is possible to give k in the process of various calculations, the data ranking in the retrieval area is relatively stable, and it is currently a combination of caching mechanism and supplementary data, and it is transforming to supplementary data, which is also the reason for the current difficulty in inclusion, It's also the reason why many sites give k today and release it tomorrow.
3. When Baidu Spider grabs the page, it starts from the starting site (that is, the seed site refers to some portal sites) first. The purpose of depth priority crawling is to crawl high-quality web pages, this strategy is calculated and allocated by scheduling, baiduspider is only responsible for crawling, weight priority refers to the priority crawling of pages with more backlinks, which is also a strategy of scheduling, under normal circumstances, web crawling 40% is the normal range, 60% is very good, 100% is unlikely.
user-agent:
Web Search: baiduspider Wireless Search: baiduspider**Search: baiduspider-image**Search: baiduspider-videoNews search: baiduspider-newsSearch: baiduspider-f**o Alliance: baiduspider-cproBusiness search: baiduspider-ads
**Don't want to be visited by baiduspider how to do:
BaiduSpider adheres to the Internet Robots Agreement. You can take advantage of robotsThe txt file completely prohibits BaiduSpider from accessing your **, or from accessing some of the files on it. About robotsFor txt's writing method, please pay attention to my previous articles.
Expect the content to be indexed but not saved for snapshots:
BaiduSpider adheres to the Internet Meta Robots Agreement. You can use the page meta setting to show only the page indexed, but not a snapshot of the page in the search results. Because it takes time for search engines to index databases, it may take two to four weeks for the update to take effect if your index information has already been established in the database.
A web spider, also known as "Baiduspider", is an automated program of a search engine.
Its function is to access web pages on the Internet, establish an index database, so that users can search for your web pages, content and other content in hundreds of search engines.
The web search engine is updated weekly, and the page is updated at different rates depending on its importance, with a frequency ranging from a few days to a month, and Baidu Spider revisits and updates a web page.
We think that for the newly generated or continuously updated pages on **, BaiduSpider will continue to crawl.
The search engine builds a scheduler to schedule the work of the web spider, so that the web spider can establish a connection with the server, the process of computing is calculated through scheduling, the web spider is only responsible for the web page, and the current search engine generally uses the web spider of wide distribution multi-server and multi-threaded to achieve the purpose of multi-threading.
The web page that comes back through the web spider ** is put into the supplementary data area, and it is put into the retrieval area after being calculated by various programs, so that a stable ranking will be formed, the supplementary data is unstable, and it is possible to give k in the process of various calculations, and the data ranking in the retrieval area is relatively stable, and the network is currently a combination of caching mechanism and supplementary data, and it is transforming to supplementary data, which is also the reason why it is difficult to include the network at present, and it is also the reason why many sites give k today and release it tomorrow.
There are two ways for web spiders to crawl pages, depth first and breadth first, breadth priority crawling is to crawl more**, depth priority is to capture high-quality web pages, this strategy is calculated and allocated by scheduling, web spiders are only responsible for crawling, weight priority refers to the priority crawling of pages with more backlinks, which is also a strategy of scheduling, Leyou think that you can better attract web spiders by establishing better and more backlinks.
After the web spider grabs the home page after logging in from the home page, the scheduling will calculate all the connections in it, and return it to the web spider for the next step of the crawl connection list, and the web spider will then carry out the next step of crawling, **The role of the map is to provide a crawling direction for the web spider, to leave and right the web spider to crawl important pages, how to let the web spider know that page is an important page??This can be achieved through the construction of connections, the more pages point to the page, the home page points to, the parent page points to the point, etc., can improve the weight of the page, another role of the map is to provide more connections to the web spider to achieve the purpose of grabbing more pages, the map is actually a list of connections provided to the web spider, to calculate your directory structure, to find the important pages built through the site connection.
A web spider is an automated program of a web search engine.
Its function is to access HTML web pages on the Internet, build an index database, and enable users to search for your ** web pages in the Internet search engine.
Frequently asked questions. 1.How much access pressure does BaiduSpider cause to a ** server?A: BaiduSpider automatically adjusts the access density according to the load capacity of the server. After a period of continuous access, Baidu Spider pauses for a while to prevent increasing the pressure on the server. So in general, BaiduSpider won't put too much pressure on your ** server.
2.Why does BaiduSpider keep scratching my **?Answer: For new or continuously updated pages on your **, BaiduSpider will continue to crawl.
In addition, you can also check whether the access to BaiduSpider in the access log is normal to prevent someone from maliciously impersonating BaiduSpider to frequently scrape yours.
If you find that BaiduSpider is crawling your ** abnormally, please feedback to webmaster@baiducom, and please try to give BaiduSpider's access log to your site, so that we can track and process.
3.I don't want my ** to be accessed by baiduspider, how do I do that? A: BaiduSpider adheres to the Internet Robots Agreement.
You can take advantage of robotsThe txt file completely prohibits BaiduSpider from accessing your **, or from BaiduSpider from accessing some of the files on your **.
Note: Disabling BaiduSpider from accessing your ** will make the pages on your ** unsearchable in web search engines and all search engines that provide search engine services on the Internet.
PS: About robotsFor more information on how to write txt, see our introduction: robotstxt Writing Method 4Why did my ** already add robotstxt, can you still search for it on the Internet? A: Because it takes time for the search engine indexing database to be updated.
Although BaiduSpider has stopped accessing the pages on your website, it may take two to four weeks for the web search engine database to clear the indexing information that has been established. Also check that your robots are configured correctly.
5.I want my content to be indexed by the web but not to save a snapshot, how do I do that? A: BaiduSpider adheres to the Internet Meta Robots Agreement.
You can use the settings of the web page meta to make the web display index only the page, but not a snapshot of the page in the search results.
As with robots updates, because it takes time for the search engine indexing database to be updated, although you have disabled the web from showing a snapshot of the page in search results through Meta, it may take two to four weeks for the web search engine database to take effect if the web page indexing information has been established.
6.Web spiders in robotsWhat is the name in txt? Answer: "baiduspider" is capitalized with the first letter b and the rest is lowercase.
7.How long does it take for BaiduSpider to recrawl my pages? A: The web search engine is updated weekly, and the page is updated at different rates depending on the importance, the frequency is between a few days and a month, and Baidu Spider will revisit and update a web page.
8.Bandwidth jam caused by BaiduSpider scraping?
Answer: The normal crawling of BaiduSpider will not cause your ** bandwidth blockage, and this phenomenon may be caused by someone pretending to be Baidu's Spider malicious scraping. If you find that an agent named BaiduSpider is scraping and causing bandwidth blockage, please contact us as soon as possible. You can send the information back to the complaint center of the web page, and if you can provide you** access logs for that period, it will be more conducive to our analysis.
BaiduSpider: How does the web get so many web pages? The program that the web uses to crawl hundreds of millions of web pages on the Internet is called the Baidu Spider.
It is a program that works day and night on the Internet to find new URLs, then crawl the contents of the URLs and return them to the web's web staging database.
The program used by the Internet to scrape web content is called baiduspider, and the spider that scrapes other content is a new name: product name corresponding to user-agent Web search baiduspider wireless search baiduspider-mobile **search baiduspider-image**search baiduspider-video News search baiduspider-news Network search baiduspider-f**o network alliance baiduspider-cpro Many friends will see this spider baiduspider-cpro in their own ** logs, and now we understand that it is a network alliance spider, which is used to match the corresponding ads with network alliance programs.
baiduspider is the official spider of the network, which is used by the network to browse and crawl you**; Baiduspider+ is a fake spider, it is someone else disguised as a web spider to avoid your **screening,Crawl your **information,If there are too many, it is recommended to block them to save server resources,It doesn't matter if it's less。
BaiduSpider crawls the site page according to the protocol set by the above-mentioned **, but it is impossible to treat all sites equally, and will determine a crawl quota based on the actual situation of the site, and crawl the site content quantitatively every day, which is what we often call crawling frequency.
So what indicators does the web search engine use to determine the crawling frequency of a **, there are four main indicators:
1. **Update frequency: The update comes more quickly, and the update comes slowly, which directly affects the visit frequency of Baiduspider.
2,**Update quality: The frequency of updates has increased, just to attract the attention of Baiduspier, Baidu Spider has strict requirements for quality, if a large number of content updated every day is judged by BaiduSpider as a low-quality page, it still makes no sense.
3. Connectivity: ** It should be safe and stable, and it should be unobstructed for BaiduSpider, and it is not a good thing to often give BaiduSpider a closed door.
4. Site evaluation: The Internet search engine will have an evaluation of each site, and this evaluation will continue to change according to the situation of the site, which is a basic score of the site by the Internet search engine (by no means the network weight said by the outside world), and it is a very confidential data within the network.
Site ratings are never used independently, and work with other factors and thresholds to influence crawling and sorting of **.
First of all, let's take a look at the principle of the search engine of the Internet: use a web spider program to constantly crawl the web pages on the Internet, and store them in your own database, and someone will search for the content you want from it.
According to the observation, web spiders like to crawl content with high frequency of updates**, and your keyword is a cold word, so there are few web pages related to it, so these are all out of these.
If you look closely, this ** is actually a place to post information.
You see that every second-level domain name is actually a farmhouse, so many people publish the same entry, of course, the web spider pays great attention to it, so it puts it in the first place, so many subpages, of course, all the pages are his.
What is BaiduSpider? BaiduSpider is an automated program of the web search engine.
Its function is to access HTML web pages on the Internet, build an index database, and enable users to search for your ** web pages in the Internet search engine.
How much access pressure does BaiduSpider cause to a ** server?BaiduSpider automatically adjusts the access density according to the load capacity of the server.
After a period of continuous access, Baidu Spider pauses for a while to prevent increasing the pressure on the server.
So in general, BaiduSpider won't put too much pressure on your ** server.
Why does BaiduSpider keep scratching my **?BaiduSpider will continue to crawl new or continuously updated pages on your website.
In addition, you can also check whether the access to BaiduSpider in the access log is normal to prevent someone from maliciously impersonating BaiduSpider to frequently scrape yours.
If you find that BaiduSpider is crawling your ** abnormally, please feedback to webmaster@baiducom, and please try to give BaiduSpider's access log to your site, so that we can track and process.
I don't want my ** to be accessed by baiduspider, how do I do that? BaiduSpider adheres to the Internet Robots Agreement.
You can take advantage of robotsThe txt file completely prohibits BaiduSpider from accessing your **, or from BaiduSpider from accessing some of the files on your **.
Note: Disabling BaiduSpider from accessing your ** will make the pages on your ** unsearchable in web search engines and all search engines that provide search engine services on the Internet.
About robotsFor more information on how to write txt, see our introduction: robotstxt writing method why my ** has added robotstxt, can you still search for it on the Internet? Because it takes time for the search engine indexing database to be updated.
Although BaiduSpider has stopped accessing the pages on your website, it may take two to four weeks for the web search engine database to clear the indexing information that has been established. Also check that your robots are configured correctly.
Web spiders in robotsWhat is the name in txt? "Baiduspider" is all lowercase.
How long does it take for BaiduSpider to recrawl my pages? The web search engine is updated weekly, and the page is updated at different rates depending on its importance, with a frequency ranging from a few days to a month, and Baidu Spider revisits and updates a web page.