Web Crawling: Why is Service a Better Option than Software?
grepsr.com
grepsr.com
"Grepsr (...) uses software as a service"
"With service mode, however, the software that runs the service (...)"
"A powerful crawling software runs at the back of our system (...)"
But the author fails to mention that the outsourcing decision holds true only for all non-mission critical crawls (whether it's for marketing, accounting or any other operations) while it's totally unfeasible if your company is doing big number crunching. When the product is the data, you need to control the accuracy and timeliness of the crawl without a doubt.
Not all companies (consultant firms, investment banks, equity researchers) have the expertise to do a in-house solution for bigger projects. This is where a service has an upper hand over using a tool.
Google handles more than 100 billion searches each month or more than three billion per day.
Google has to crawl more than 20 billion pages a day to keep up with the ever-changing web.
Google has found 60 trillion web addresses so far, up from one trillion in 2008.
Google has indexed pages from over 230 million domains.
A query on Google travels 750 miles each way, to and from the data centre.