Welcome to our forums! The guild Dark Elites was founded October 31, 2007 by SweetAngel. We hope you enjoy your stay.
 
HomeHome  GalleryGallery  CalendarCalendar  FAQFAQ  SearchSearch  RegisterRegister  MemberlistMemberlist  UsergroupsUsergroups  Log inLog in  

Share | 
 

 Search engines

Go down 
AuthorMessage
Mrblack0301
Rank I: Dofus Seasoning
Rank I: Dofus Seasoning


Number of posts : 28
Registration date : 2011-07-21

PostSubject: Search engines   Sun Aug 07, 2011 8:34 am

Before we start talking about search engine optimization we need to understand how search engines work. Basically, each search engine consists of 3 parts:
The Crawler (or the spider). This part of a search engine is a simple robot that downloads pages of a website and crawls them for links. Then, it opens and downloads each of those links to crawl (spider) them too. The crawler visits websites periodically to find the changes in their content and modify their rankings accordingly. Depending on the quality of a website and the frequency of its content updates this may happen from say once per month up to several times a day for a high popularity news sites.

The crawler does not rank websites itself. Instead, it simply passes all crawled websites to another search engine module called the indexer.

The Indexer. This module stores all the pages crawled by the spider in a large database called the index. Think of it as the index in a paper book: you find a word and see which pages mention this word. The index is not static, it updates every time the crawler finds a new page or re-crawls the one already presented in the index. Since the volume of the index is very large it often takes time to commit all the changes into the database. So one may say that a website has been crawled, but not yet indexed.

Once the website with all its content is added to the index, the third part of the search engine begins to work.

The ranker (or search engine software). This part interacts with user and asks for a search query. Then it sifts millions of indexed pages and finds all of them that are relevant to that query. The results get sorted by relevance and finally are shown to a user.

What is relevance and how would one determine if a page is more or less relevant to a query? Here comes the tricky part - the ranking factors...



couplescounselingnewyork
overnight bags for women
Back to top Go down
View user profile
 
Search engines
Back to top 
Page 1 of 1
 Similar topics
-
» UCI and XBoard Engines for Android
» Limited strength of chess engines ...
» Engines - new Mac builds
» Best Opening book to test engines
» Which engines support "UCI_LimitStrength" + "UCI_Elo"?

Permissions in this forum:You cannot reply to topics in this forum
Dark Elites :: Community :: Recruitment-
Jump to:  
Create a forum on Forumotion | © phpBB | Free forum support | Report an abuse | Forumotion.com