This is my understanding of how Google's search works, and I am unsure about one thing in specific:
- Google continuously crawls websites and stores each page it finds (let's call it "page directory")
- Google's "page directory" is a cache so it isn't the "live" version of the page
- Google has separate storage called "the index" which contains all the keywords searched. These keywords in "the index" point to the pages in the "page directory" that contain the same keywords.
- When someone searches a keyword, that keyword is accessed in the "index" and returns all relevant pages in the "page directory"
- These returned pages are given ranks based on the algorithm
The one part I'm unsure of is how Google's "index" knows the location of relevant pages in the "page directory". The keyword entries in the "index" point to the "page directory" somehow. I'm thinking each page has a url in the "page directory", and the entries in the "index" contain these urls. Since Google's "page directory" is a cache, would the urls be the same as the live website (and would the keywords in the "index" point to these urls)?
For example if webpage is found at wwww.website.com/page1, would the "page directory" store this page under that url in Google's cache?
The reason I want to discuss this is to know the effects of changing a pages url by understanding how the search process works better.