Cassandra : Lessons learnt

After working with Cassandra for couple of months I thought of jotting down my Cassandra experience including what we did, what I liked and not so liked. But I need to put a little disclaimer up front. We are currently using Cassandra 0.7  (“What !#$*?? Have you been living under a rock? Get your self [...]

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Modelling SQL queries using Map Reduce

Let’s see how we can model some regularly used SQL queries using map reduce. select … from … where … Take following example For this example let’s assume a suitable InputFormat (in case of Hadoop) does the reading from the database and emit key value pairs in the form (k, rec) where k is primary [...]

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Hector : Under the Hood

One of the past several days I decided to have a look how Hector, the Cassandra access library works under the hood. This was partially motivated by of the confusing the notions I had about some of API classes, specially Cluster. My initial impression was Cluster API class represents a Cassandra cluster but looking at [...]

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