mikejuk writes "Google has moved its advertising services from MySQL to a new database, created in-house, called F1. The new system combines the best of NoSQL and SQL approaches.
The store is dynamically sharded, supports replication across data centers while keeping transactions consistent, and can deal with data center outages without losing data. The downside of keeping the transactions consistent means F1 has higher write latencies compared to MySQL, so the team restructured the database schemas and redeveloped the applications so the effect of the increased latency is mainly hidden from external users. Because F1 is distributed, Google says it scales easily and can support much higher throughput for batch workloads than a traditional database."
Link to Original Source