I have a question regarding quorum in context to
Zookeeper requires that you have a quorum of servers up, where quorum is
ceil(N/2). For a 3 server ensemble, that means 2 servers must be up at any
time, for a 5 server ensemble, 3 servers need to be up at any time.
1. what does quorum mean?
2. so does ceil(N/2) mean 3+1/2 = 4/2 which is 2 servers in context to 3
server ensemble and 5+1/2 = 6/2 which is 3 servers in context to 5 server
ensemble if the ceil(N/2) is a ceiling function?
3. what does ensemble mean in context to Apache zookeeper?
I would appreciate your help.