How does Voldemort compare to Cassandra? I m not talking about size of community and only want to hear from people who have actually used both. Especially I m interested in: How they dynamically ...

Does anyone have experience with Cassandra when nodes go down or are unavailable? I am mostly interested in whether the cluster rebalances and what happens when the nodes come online, or are replaced ...

We are looking at using Cassandra to store a stream of information coming from various sources. One issue we are facing is the best way to query between two dates. For example we will need to ...

We re setting out to build an online platform (API, Servers, Data, Wahoo!). For context, imagine that we need to build something like twitter, but with the comments (tweets) organized around a live ...

Is there a way to get a row count (key count) of a single column family in Cassandra? get_count can only be used to get the column count. For instance, if I have a column family containing users and ...

What happens when a new value for an existing column is added? Will the older value be overwritten by the new value? Or the older value will also retain and can be retrieved (similar to simpleDB)?

I m working on an application where data size and SQL queries are going to be heavy. I am thinking between Cassandra or Amazon SimpleDB. Can you please suggest which is more suitable in this kind of ...

So I see here that Cassandra does not have automatic load balancing, which comes into view when using the ordered partitioner (a certain common range of values of a group of rows would be stored on a ...