How to Build a Search Engine? (2013 Update) -

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this isn't first time question has been asked here @ stackoverflow - 5 years later - , times , technologies have changed bit. i'm wondering folks thinking these days building search engine?

for example, know nutch continuing developed - still robust solution available? there alternative mature solutions available other languages - e.g. c#, php, vb.net?

i know there publicly available mass index can utilized, reducing need perform one's own spidering common crawl.

there of course, still few custom search engine solutions out there, well-known being google's cse...but i'm not aware of other major/stable/reputable ones i'd trust build engine upon?

what resources available learn programming search engines weren't available few years ago, or last year?

udacity's got course on learning python via creating web crawler, try here: https://www.udacity.com/course/cs101


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