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From ibrahim El-sanosi <>
Subject Is ZooKeeper still use in Cassandra?
Date Sun, 30 Aug 2015 21:09:36 GMT
Hi folks,

I read Cassandra white paper, I come across a text says "Cassandra system
elects a leader amongst its nodes using a system called Zookeeper[13]. All
nodes on joining the cluster contact the leader who tells them for what
ranges they are replicas for and leader makes a concerted effort to
maintain the invariant that no node is responsible for more than N-1 ranges
in the ring. The metadata about the ranges a node is responsible is cached
locally at each node and in a fault-tolerant manner inside Zookeeper - this
way a node that crashes and comes back up knows what ranges it was
responsible for."

Does Cassandra still use ZooKeeper? if yes can you refer me to any related



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