Aerospike Open Sources Their In-memory NoSQL Database
Aerospike has open sourced their NoSQL database under the AGPL 3.0 license. This license requires that any improvements to the source code to be submitted back to the trunk. The source code of the Aerospike server and related tools is available on GitHub.
Aerospike currently packages the database in two editions: the Community Edition and the Enterprise Edition. The Community Edition was free before but it was limited in terms of clustering, storage capabilities and number of transactions/sec. These limitations have been removed with the latest version (3.3.5), the database having most of the capabilities of the paid Enterprise Edition which offers additionally replication across multiple data centers, patches and support.
Aerospike has client libraries for C, C++, Java, C#, Node.js, Python, PHP, Erlang and Perl, all licensed under Apache 2.0, enabling developers to program against the database.
The company has also announced raising $20M in Series C funding to support future development.
Aerospike is a schema-less key-value store optimized for DRAM and flash memory.
"This (AGPL 3.0) license requires that any improvements to the source code to be submitted back to the trunk."
No, it doesn't. None of the GPL licenses require source to be submitted back to anyone. None of the GPL licenses require you to actively do anything with the source code (e.g. send or submit), save make it available to those entitled to it under the license (which is not "the world", "the public",or "anyone who asks", much less the original authors).