It's not about being big, banks and insurance companies simply have different requirements on how to access and store their data compared to most websites/services.
It's not about being big, banks and insurance companies simply have different requirements on how to access and store their data compared to most websites/services.
If you took all of the votes from the 2000 election in the United States (I'll save you the search - it was just over 100 million), it wouldn't even equal one day's ATM transactions in the U.S., and those transactions are a nonevent.
Twitter in not only big in terms of traffic. 200 million tweets per day is not small, even if a tweet involves less processing than an ATM transaction. You can also consider Facebook as an example of website dealing with big data.
http://www.google.com/intl/en/jobs/uslocations/mountain-view...
Google does use MySQL for their AdSense/AdWords transactional system (ie, buying AdWords).