> If I have a cluster with 15-20T nodes, somethings that I know will be a > potential problem are > > Compactions taking longer > Higher read latencies > Long time for adding/removing nodes > > What are other things that can be problematic with big nodes?
http://wiki.apache.org/cassandra/LargeDataSetConsiderations (some details slightly out of date by now, I should try to update it) Honestly though, I don't recommend going for nodes that big unless you want to spend time dealing with issues you'll hit. -- / Peter Schuller (@scode on twitter)