This document discusses data storage solutions for social network games. It describes using Couchbase NoSQL technology instead of SQL databases, which have limitations for SNS games. It introduces the SNS Storage Engine (SSE), a PHP library the author developed that provides a layer between developers and Couchbase. SSE aims to address challenges of NoSQL by providing support for concurrency control, high-level data structures, and preventing data corruption. It also includes a tool for viewing and editing raw account data. Finally, it discusses a multi-instance architecture used to improve performance over Couchbase's replication features.