An overview of Postgres-XC is provided. Postgres-XC is a free, open source, PostgreSQL based write scalable cluster. It runs on multiple servers, is fully ACID and consistent. Postgres-XC is a traditional relational alternative to cases where NoSQL solutions are being considered.
This presentation was given in San Francisco August 7th by Mason Sharp, one of the original architects of Postgres-XC and co-founder of StormDB (http://www.stormdb.com).