The technology that powers these online dating sites ranges from incredibly easy to incredibly complicated.

Unsurprisingly, eHarmony has probably the most data that is sophisticated. Joseph Essas, vice president of technology, claims the organization shops 4 terabytes of information on some 20 million new users, every one of who has done a 400-question mental profile (eHarmony’s founder is a medical psychologist).

The business makes use of proprietary algorithms to score that data against 29 “dimensions of compatibility” — such as for example values, character designs, attitudes and interests — and match customers with all the most effective leads for a long-lasting relationship.

A giant Oracle 10G database spits out a couple of initial prospects just after a user signs up, to prime the pump, nevertheless the real matching work happens later, after eHarmony’s system ratings and matches up responses to a huge selection of concerns from a huge number of users.

The method calls for just below 1 billion calculations which are prepared in a huge batch procedure every day. Plus »