NoSQL databases scale by adding more commodity servers. With more commodity servers come increased costs and complexities. Some NoSQL systems are better at this than others and need less.… Read More Operations costs are the Achille’s heel of NoSQL
1. Do you know what your queries will look like ? In traditional SQL you design your data model to represent your business objects. Your queries can then evolve over time and can be ad-hoc. You can even create views, materialized or otherwise, to facilitate even more complex analytical queries. Cassandra does not offer… Read More Ten Questions to Consider Before Choosing Cassandra
Big Data is not Hadoop, and Hadoop is not Big Data. A lot of people are surprised that somehow Big Data adoption is growing while Hadoop is struggling. There is some speculation as to why and I have a much more pragmatic explanation: Hadoop is not SQL. Not all developers are created equal. Not all… Read More Big Data is not all about Hadoop
Google recently launched Cloud BigTable – a cloud NoSQL service that is compatible with Apache HBase API. What this means is that an existing ecosystem of Hadoop applications is immediately binary-compatible with this new service and it doesn’t require any changes to the API. Google is not only marketing this as an alternative to Hadoop,… Read More We Need a Cloud Version of Cassandra
One thing I did not realize about Cassandra is that Apple is (or was) one of the biggest Cassandra users out there: Word in Goldmacher’s circles is that Apple will be “replacing” its huge Cassandra noSQL implementation with FoundationDB. Apple uses Cassandra for “iMessage, iTunes passwords, a bunch of stuff,” he says. In fact, Apple… Read More Apple is (or was) the Biggest User of Apache Cassandra
In November last year I pointed out how tempted I was to replace Cassandra with DynamoDB. Since then I have done some research and things are not as straightforward as they may seem at first. I’d like to revisit my post and clarify a few things. On elasticity of Cassandra I said the following: Scaling… Read More Trying to Replace Cassandra with DynamoDB ? Not so fast
I have written about Cassandra in the past. I have been using Cassandra actively for the past three years, and I am one of the big advocates of technology out there. However, as I have pointed in this blog and on my Twitter page – if you plan on scaling Cassandra out, be prepared to… Read More Why I am Tempted to Replace Cassandra With DynamoDB
When building out a data center in the cloud (AWS in particular) Cassandra can play a crucial role in the design for failure. SQL and NoSQL databases have drastically different redundancy profiles: A NoSQL database (and I hate the term NoSQL with the passion of a billion white hot suns) trades off data consistency for… Read More Cassandra: a key puzzle piece in a design for failure
At first I wanted to name this article “My personal list of grievances against Apache Cassandra”, but I decided to take a more positive approach. Only Java developers need apply Surely you can use Cassandra with non-Java clients but the reality is that administering and maintaining Cassandra itself requires very significant knowledge of Java and… Read More Things I wish Apache Cassandra was better at
The Dulin Report 