Twitter Revamps Search Engine Backend

Oct 7, 2010 - 7:50 am 3 by
Filed Under Social Search

Twitter announced they have "launched a new backend for search on twitter.com." In short, they moved from the original Summarize technology they bought years ago to a infrastructure and system that is completely new, home grown.

Tedster at WebmasterWorld pulls out the key differences:

  • Twitter's real-time search engine was, until very recently, based on the technology that Summize originally developed.
  • [Now we have] a new, modern search architecture based on a highly efficient inverted index instead of a relational database.
  • With over 1,000 TPS (Tweets/sec) and 12,000 QPS (queries/sec) = over 1 billion queries per day (!) we already put a very high load on our machines.
  • We estimate that we're only using about 5% of the available backend resources, which means we have a lot of headroom. Our new indexer could also index roughly 50 times more Tweets per second than we currently get!

Regarding the 1 billion queries per day, they are not human searches. I strongly recommend you read Danny's piece on that.

Twitter said they chose Lucene, a search engine library written in Java, as a starting point. But not without modifications, things Twitter changed include significantly improved garbage collection performance, lock-free data structures and algorithms, posting lists, that are traversable in reverse order and efficient early query termination.

Forum discussion at WebmasterWorld.

 

Popular Categories

The Pulse of the search community

Follow

Search Video Recaps

 
Google Volatility, Indexing Bugs, Google Ads Broad Match Default & YouTube SEO Tips - YouTube
Video Details More Videos Subscribe to Videos

Most Recent Articles

Search Forum Recap

Daily Search Forum Recap: July 12, 2024

Jul 12, 2024 - 10:00 am
Search Video Recaps

Search News Buzz Video Recap: Google Volatility, Indexing Bugs, Google Ads Broad Match Default & YouTube SEO Tips

Jul 12, 2024 - 8:01 am
Google Maps

Remove Thumbtack Book Links In Google Business Profiles

Jul 12, 2024 - 7:51 am
Google Search Engine Optimization

New: Google Search Console Let's You Add Your Shipping & Return Information

Jul 12, 2024 - 7:41 am
Google

Google Search Tests Autoplaying Video Thumbnails In Results?

Jul 12, 2024 - 7:31 am
Bing Search

Bing Search Tests Voting On Search Results

Jul 12, 2024 - 7:21 am
Previous Story: More Google Properties Get Instant