> So, for the quorum, what we really want is that there is one overlap among > the nodes in write path and read path. It actually was my assumption for a > long time that we need (N/2 + 1) for write and just need (N/2) for read, > because it's enough to provide the strong consistency. >
You are write about strong consistency with that calculation, but if I want to issue a QUORUM read just by itself, I would expect a majority of nodes to reply. How it was written might be immaterial to my use case of reading 'from a majority.' -- ----------------- Nate McCall Wellington, NZ @zznate CTO Apache Cassandra Consulting http://www.thelastpickle.com