Brandon Williams created CASSANDRA-9206: -------------------------------------------
Summary: Remove seed gossip probability Key: CASSANDRA-9206 URL: https://issues.apache.org/jira/browse/CASSANDRA-9206 Project: Cassandra Issue Type: Improvement Reporter: Brandon Williams Assignee: Brandon Williams Currently, we use probability to determine whether a node will gossip with a seed: {noformat} double probability = seeds.size() / (double) (liveEndpoints.size() + unreachableEndpoints.size()); double randDbl = random.nextDouble(); if (randDbl <= probability) sendGossip(prod, seeds); {noformat} I propose that we remove this probability, and instead *always* gossip with a seed. This of course means increased traffic and processing on the seed(s), but even a 1000 node cluster with a single seed will only put ~1000 messages per second on the seed, which is virtually nothing. Should it become a problem, the solution is simple: add more seeds. Since seeds will also always gossip with each other, this effectively gives us a poor man's spanning tree, with the only cost being removing a few lines code, and should greatly improve our gossip convergence time, especially in large clusters. -- This message was sent by Atlassian JIRA (v6.3.4#6332)