During the recent CouchConf in San Francisco, Frank Weigel, a Couchbase product manager, touted the benefits of schemaless databases: without a schema, developers may add fields without going through a DBA. The audience of developers seemed pleased, but I wondered…
Last Friday, I had the pleasure of attending CouchConf in San Francisco to learn about the new and exciting features of Couchbase 2.0. With the new release, Couchbase becomes a full document oriented database . Meanwhile, Couchbase keeps its focus on performance,…
This Monday at the Silicon Valley NewSQL meetup in Mountain View, Michael Stonebreaker took turns bashing both the established relational databases (Oracle, DB2, SQL Server, PostgreSQL) and the NoSQL newcomers (MongoDB, Cassandra, Riak), proposing a third alternative, VoltDB, a NewSQL…
In February 2011, Membase, Inc. and CouchOne merged to combine the strengths of their two open-source NoSQL projects, Membase and CouchDB. The joint team released Couchbase 1.8 in January, 2012 as an upgrade to Membase 1.7. Version 2.0 is now…
In my last posts on eventual consistency, I mentioned that R+W>N guarantees consistency. Thanks to commentator senderista for pointing that this statement does not hold in the case of sloppy quorums. The Amazon Dynamo article describes sloppy quorum as such:…
In previous posts, I explored MongoDB and Redis. MongoDB, a document-oriented database, allows developers to work with JSON documents in interesting ways. Redis offers developers a set of fundamental data structures upon which to build applications. Riak, in contrast, offers…
No, it’s not really SQL. Its syntax resembles JSON. It returns a collection of JSON documents. But the Aggregation Framework addresses for MongoDB what many have found lacking in non-relational databases, the capability for ad hoc queries that SQL performs…
Redis differs so dramatically from traditional databases that you’d be forgiven for not recognizing the family resemblance. Indeed, it’s possible to run Redis as a key-value memory cache, mimicking the functionality of Memcached, which itself is not a database. Like…
Memcached might seem an odd place to venture in an exploration of NoSQL databases. It is not a database. It provides no persistence. It purges items from memory to free space as needed. And there is no replication. If data…
After writing my last post on MongoDB, I attended a meet-up at the Mozilla office in San Francisco to hear the tale of a real company in the process of migrating from Microsoft SQL Server to MongoDB. The company, Harmonic,…
Jim Downey 
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