See conference video - http://www.lucidimagination.com/devzone/events/conferences/revolution/2011 mixi is one of the largest social networking services in Japan, providing various communication services for over 14M monthly active users. The latest internal mixi project is to replace the in-house search engine with Apache Solr. This session covers two topics a simple packaging system for Solr that eases the installation process and daily operations, and implementation of a “Did you mean” facility for Japanese queries using a log mining tool. These tools have been released as OSS projects.

1. Solr Cluster installation tool "Anuenue" and "Did You Mean?" for Japanese Takahiko Ito mixi, Inc.

15. Example: simple cluster settings Input Data bb cc aa Forward queries Index input data Client-1 Client-2 <mergers> <merger> <host>aa</host> <port>8983</port> </merger> </mergers> <masters> <master iname=“master1”> <host>bb</host> <port>8983</port> </master> </masters> <slaves> <slave> <host>cc</host> <port>8983</port> <replicate>master1</replicate> </slave> </slaves> Replicate index

17. Assign multiple roles Input Data instance Client1 Client2 Index input data Submit queries

18. Large clusters to handle huge data with high QPS Input Data Client1 Slave1 Client2 Merger1 Slave3 Slave2 Slave4 Master1 Master2 Slave5 Slave6 Master3 Master4 Master5 Master6 Merger2 Merger3 Client3 ClientN …

24. Example: Did-You-Mean service (English: Ugly Betty)

47. Thank you for your attention!