Hi - I have a Riak node with n_val=3, r=2, w=2 and have just one key-object stored there-in. I'm trying to test various configurations to better understand the system and have the following observations - some dont seem to align with my understanding so far, so appreciate if someone can throw some light please... Thanks!
1. n=3, r=2, w=2: Base state, 1 key-value pair. 2. Change to n=2, r=2, w=2: When I query from my client, I randomly see 1 or 2 values being fetched. In fact, the number of keys fetched is 1 or 2, randomly changing each time the client queries the db. Ideally, I would have expected that if we reduce the n_val, there would be data loss from one of the vnodes. And that for this scenario, I would still expect only 1 (remaining) key-value pair to be read from the remaining two vnodes that has the data. Note that I dont intend to make such a change in production as cognizant of the recommendation to never decrease the value of n, but have done so only to test out the details. 3. Then change to n=2, r=1, w=1: I get the same alternating result as above, i.e. 1 or 2 values being fetched. 4. Then change to n=1, r=1, w=1: I get 3 key-value pairs, all identical, from the database. Again, are these all siblings?
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