Ask HN: Hadoop+HBase or Cassandra for medium time series data?

I need to get a server together ASAP for collecting and querying some time series metrics...if I only want to work with a single node, which would be easier to setup/manage between Cassandra and Hadoop/HBase (running in pseudo-distributed mode)? Or something else entirely? Either that I mention would exceed my performance requirements. I've dealt with Hadoop/HBase before, but it's been a couple years...I remember it being a pain to manage (I was running everything on a single node in pseudo-distributed mode).