Hi, I am observing the following: (Setup, 3 physical nodes, default settings of R 2, W 2, N 3, LevelDB backend, using riak:local_client() from inside the same BEAM.)
1. Three fresh nodes are started up with empty data and ring state directories, the second two are told to join the first, and then a bunch of seed data is loaded, as part of a deployment script. 2. The nodes are all stopped at the end of the deployment. 3. When the system is started for real, the nodes are brought back up, and are re-connecting from the ring state they had persisted during deployment. 4. One of our own OTP applications running inside the cluster detects that riak_kv is started and ring ready, it begins to try to load and process some of the data. 5. It first lists all of the keys from a bucket, then retrieve them one by one. PROBLEM: Some of the objects that were in the list of keys return not_found when retrieved. -------------------- Questions A) I see from some searching on the mailing list archives that as of mid-2011 objects may be unavailable during handoffs. Is this still the case with riak_kv 1.1? B) What is the canonical way to make sure that all handing off of the current ring is done after joining and that retrieval operations will be completely reliable? C) In the case of physical node failure and failover, is there ever a chance of erroneous not_founds with the default R/W/N settings? Thanks! Will Hutchinson TrueEx -- *CONFIDENTIALITY NOTICE* THE INFORMATION CONTAINED IN THIS COMMUNICATION IS INTENDED FOR THE NAMED RECEIVER ONLY. THE TRANSMISSION MAY CONTAIN PRIVILEGED AND CONFIDENTIAL MATERIAL. IF YOU ARE NOT THE NAMED RECIPIENT, PLEASE BE ADVISED THAT ANY USE, DISSEMINATION OR UNAUTHORIZED COPYING OF THE MATERIAL IS STRICTLY PROHIBITED. IF YOU HAVE RECEIVED THIS TRANSMISSION IN ERROR, PLEASE NOTIFY supp...@trueex.com AND DESTROY THE RECEIVED COPY. THANK YOU.
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