Dear all, After a quick glimpse at Riak, I must say I like it: DHT with masterless design and gossiping protocol, that is appealing. More than maintainability or configurability, I am interested in scalability. I have looked at the node adding process for fine scaling, but for scaling big (over the long term) the necessity of resizing the ring (in order to double the number of partitions) seems unavoidable to me. On Github, the v1.4 changelog seems to indicate that the "ring resizing feature" is now merged in the release (notably from riak-core#301); however, the official documentation for v1.4 (on docs.basho.com) still states that "ring_creation_size" is only configured a install time. I understand that ring resizing is not by itself a scaling mechanism, but if you keep scaling out, sooner or later you will reach the limit. So I would like a bit of clarification on it: - is this feature officially released as part of 1.4? - if yes, is it a stable feature, is it ready for production? if not, is it still under ongoing development? - if it was released as unstable, what is your experience with it? - in your opinion, can the problem be simplified if we only consider scaling out by doubling the ring size? Also, independently of ring resizing, what do you consider the current limits of ring_creation_size? I have seen mentioned that 2048 and higher could importantly increase the volume of gossiping, what is your experience with it? I hope you will be kind enough to provide me with some enlightenments. Kind regards. PN
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