auto_bootstrap=false tells it to join the cluster without running bootstrap – the node assumes it has all of the necessary data, and won’t stream any missing data.
This generally violates consistency guarantees, but if done on a single node, is typically correctable with `nodetool repair`. If you do it on many nodes at once, it’s possible that the new nodes could represent all 3 replicas of the data, but don’t physically have any of that data, leading to missing records. From: <burtonator2...@gmail.com> on behalf of Kevin Burton Reply-To: "user@cassandra.apache.org" Date: Sunday, October 18, 2015 at 3:44 PM To: "user@cassandra.apache.org" Subject: Re: Would we have data corruption if we bootstrapped 10 nodes at once? An shit.. I think we're seeing corruption.. missing records :-/ On Sat, Oct 17, 2015 at 10:45 AM, Kevin Burton <bur...@spinn3r.com> wrote: We just migrated from a 30 node cluster to a 45 node cluster. (so 15 new nodes) By default we have auto_boostrap = false so we just push our config to the cluster, the cassandra daemons restart, and they're not cluster members and are the only nodes in the cluster. Anyway. While I was about 1/2 way done adding the 15 nodes, I had about 7 members of the cluster and 8 not yet joined. We are only doing 1 at a time because apparently bootstrapping more than 1 is unsafe. I did a rolling restart whereby I went through and restarted all the cassandra boxes. Somehow the new nodes auto boostrapped themselves EVEN though auto_bootstrap=false. We don't have any errors. Everything seems functional. I'm just worried about data loss. Thoughts? Kevin -- We’re hiring if you know of any awesome Java Devops or Linux Operations Engineers! Founder/CEO Spinn3r.com Location: San Francisco, CA blog: http://burtonator.wordpress.com … or check out my Google+ profile -- We’re hiring if you know of any awesome Java Devops or Linux Operations Engineers! Founder/CEO Spinn3r.com Location: San Francisco, CA blog: http://burtonator.wordpress.com … or check out my Google+ profile
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