MySQL is currently hosting a poll in which they have asked respondents to answer the following question:
Which open source NoSQL databases are you using?
While there is not enough of responses, currently at 112 at the time of writing, it's still interesting to see the responses. One note about the results is that multiple databases were allowed to be selected. Here are the current results, as of 3/22 at 10:45pm, of some of the various NoSQL databases.
- Cassandra - 19 (17.0%)
- CouchDB - 16 (14.3%)
- Membase - 9 (8.0%)
- MongoDB - 27 (24.1%)
- Neo4j - 7 (6.2%)
- Redis - 12 (10.7%)
- Riak - 6 (5.4%)
See the full results at: Which open source NoSQL databases are you using?