Grokking the System Design Interview, Volume II
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Gossiper

Let's explore how Cassandra uses gossip protocol to keep track of the state of the system.

How does Cassandra use gossip protocol?

Cassandra uses gossip protocol that allows each node to keep track of state information about the other nodes in the cluster. Nodes share state information with each other to stay in sync. Gossip protocol is a peer-to-peer communication mechanism in which nodes periodically exchange state information about themselves and other nodes they know about

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Amey Naik

· 5 years ago

"Seed nodes: To prevent problems in gossip communications, Cassandra designates a list of nodes as the seeds in a cluster. This is critical for a node starting up for the first time. By default, a node remembers other nodes it has gossiped with between subsequent restarts. The seed node designation has no purpose other than bootstrapping the gossip process for new nodes joining the cluster. Thus, seed nodes are not a single point of failure, nor do they have any other special purpose in cluster operations other than the bootstrapping of nodes"

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Gary

· 4 years ago

How does the seed node help new nodes bootstrap? How does it bootstrap itself?