Hi Riak Users, In the documentation <http://docs.basho.com/riak/kv/2.2.0/using/admin/commands/#leave> for riak-admin cluster leave it says “You can stage multiple leave command before planning/committing.” This implies that it is safe to stage multiple nodes leaving the cluster simultaneously. Is that true? Will all data in the cluster be continuously available during the removal period if, for example, I setup and commit a plan for 3 nodes to be leave a 9-node cluster (assuming there is enough space for the data on the remaining 6 nodes)?
I had asked a similar question on IRC a couple weeks ago. In that case I was asking about replacing multiple nodes simultaneously using riak-admin cluster replace. The answer I got there left some doubt in my mind as to whether it is safe (i.e., will not result in a period data availability) to have multiple nodes leaving the cluster at once. The documentation for replace implies that it is safe to replace multiple nodes simultaneously as well: “You can stage multiple replace actions before planning/committing.” Note that I am not asking about force-remove or force-replace, which I would expect to result in permanent data loss if multiple nodes are force-removed/replaced simultaneously. My cluster is running Riak 2.1.1 with standard nval of 3. Thanks! Daniel
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