&gt;I don&#x27;t know any internal details of Twitter<p>There were quite a couple of relevant posts on Twitter Engineering Blog if you are interested:<p><a href="https:&#x2F;&#x2F;blog.twitter.com&#x2F;2011&#x2F;spiderduck-twitters-real-time-url-fetcher" rel="nofollow">https:&#x2F;&#x2F;blog.twitter.com&#x2F;2011&#x2F;spiderduck-twitters-real-time-...</a><p><a href="https:&#x2F;&#x2F;blog.twitter.com&#x2F;2012&#x2F;blobstore-twitter-s-in-house-photo-storage-system" rel="nofollow">https:&#x2F;&#x2F;blog.twitter.com&#x2F;2012&#x2F;blobstore-twitter-s-in-house-p...</a><p><a href="https:&#x2F;&#x2F;blog.twitter.com&#x2F;2014&#x2F;manhattan-our-real-time-multi-tenant-distributed-database-for-twitter-scale" rel="nofollow">https:&#x2F;&#x2F;blog.twitter.com&#x2F;2014&#x2F;manhattan-our-real-time-multi-...</a><p><a href="https:&#x2F;&#x2F;blog.twitter.com&#x2F;2014&#x2F;push-our-limits-reliability-testing-at-twitter" rel="nofollow">https:&#x2F;&#x2F;blog.twitter.com&#x2F;2014&#x2F;push-our-limits-reliability-te...</a><p><a href="https:&#x2F;&#x2F;blog.twitter.com&#x2F;2015&#x2F;building-a-new-trends-experience" rel="nofollow">https:&#x2F;&#x2F;blog.twitter.com&#x2F;2015&#x2F;building-a-new-trends-experien...</a>