- All schema fields except body is stored in Neo4J
- Body, hierarchy is stored in cassandra
- Redis caches the content ids and hierarchy for use by other services
- Content is indexed to Elastic Search
- Search API runs off Elastic Search. More details here
- The compositesearch index is used for the search.
- compositesearch is actually just an alias to an actual ES index. This is done so that if the index crashes, a new index can be built, and the alias can be pointed to the new index
Cassandra migrations are stored in this repo -https://github.com/project-sunbird/sunbird-utils
Folder - sunbird-cassandra-migration/cassandra-migration/src/main/resources/db/migration/cassandra
There are two redis instances running. A metadata redis and a knowledge platform redis
- metadata redis / db12 : user cache used by DP Jobs