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kumofs: All content tagged as kumofs in NoSQL databases and polyglot persistence

New Projects in NoSQL Space

Lately I’ve been hearing about a couple of newcomers in the NoSQL space so here is your chance to find out about them and why not provide other readers with some additional feedback about each of them:


Kumofs is a distributed key-value store built on top of Tokyo Cabinet and using the memcached protocol.

According to the ☞ project homepage:

  • Data is partitioned and replicated over multiple servers.
  • Extreme single node performance; comparable with memcached.
  • Both read and write performance got improved as servers added.
  • Servers can be added without stopping the system.
  • Servers can be added without modifying any configuration files.
  • The system does not stop even if one or two servers crashed.
  • The system does not stop to recover crashed servers.
  • Automatic rebalancing support with a consistency control algorithm.
  • Safe CAS operation support.
  • memcached protocol support.

There already seems to be ☞ success story of kumofs, but you’ll have to take that with a grain of salt as the same company was announcing a success story with Redis for the same problem.

Raven DB

Raven DB is a dual licensed document database for the .NET platform with a RESTful API.

According to the ☞ project homepage:

  • Scalable infrastructure: Raven builds on top of existing, proven and scalable infrastructure
  • Simple Windows configuration: Raven is simple to setup and run on windows as either a service or IIS7 website
  • Transactional: Raven support System.Transaction with ACID transactions. If you put data in it, that data is going to stay there
  • Map/Reduce: Easily define map/reduce indexes with Linq queries
  • .NET Client API: Raven comes with a fully functional .NET client API which implements Unit of Work and much more
  • RESTful: Raven is built around a RESTful API


Orient comes in two flavors: OrientDB: a document database and OrientKV a key-value store, both running on the Java platform.

According to the ☞ project homepage, OrientDB is a

scalable Document based DBMS that uses the features of the Graph Databases to handle links. It’s the basic engine of all the Orient products. It can work in schema-less mode, schema-full or a mix of both. Supports advanced features, such as indexing, fluent and SQL-like queries. It handles natively JSON and XML documents.

The OrientKV is a:

Key/Value Server based on the Document Database technology and accessible as embedded repository via Java APIs or via HTTP using a RESTful API. Orient K/V uses a new algorithm called RB+Tree, derived from the Red-Black Tree and from the B+Tree. Orient Key/Value server can run in high availability mode using a cluster of multiple nodes partitioned.

Have you tried any of these?


According to the GitHub page, Pincaster is a persistent NoSQL database to store geographic data and key/value pairs, with a HTTP/JSON interface. Unfortunately there’s almost no documentation about the project so I don’t think there’s anything else I could add for now.

Update: hint received from @fs111