"Twitter, Facebook, the Library of Congress -- all of these institutions have mind-numbing amounts of structured and unstructured data that must be indexed and searched quickly. In Twitter's case, that's about 300 million new pieces of information to index every day.
So it's not surprising that such institutions would venture into the seemingly untamed world of open-source search applications, not just for the cost savings, but also for the ability to customize and modify applications quickly. Plus, open source has an active community that can help solve related problems..."
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