PostgreSQL | Open Source Database Cluster | Cloud Services
PostgreSQL is a powerful, open source relational database management system and the foundation of StormDB, Stado and Postgres-XC. It has been in development since 1986 and has a strong reputation for excellent architecture, reliability, and data integrity. It runs on all major operating systems, including Linux, UNIX, and Windows. It is fully ACID-compliant and supports foreign keys, joins, views, triggers, stored procedures (in multiple languages), and strongly conforms to the ANSI-SQL:2008 standard. PostgreSQL includes native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, ODBC, and others.
PostgreSQL has sophisticated features, such as Multi-Version Concurrency Control (MVCC), point-in-time recovery, tablespaces, asynchronous replication, nested transactions (savepoints), online/hot backups, a sophisticated query planner/optimizer, and write-ahead logging for fault tolerance. It supports international character sets, multi-byte character encodings, and Unicode, and it is locale-aware for sorting, case-sensitivity, and formatting. PostgreSQL is highly scalable, both in the quantity of data it can manage and in the number of concurrent users it can accommodate.
In short, PostgreSQL is the perfect database to use for the basis of a Database Cloud. StormDB is an active supporter of PostgreSQL and PostgreSQL-related projects, whose founders also help to organize the New York City PostgreSQL User Group and the Philly PostgreSQL User Group.