Hi, How can a Riak KV client determine when a certain CRDT update operation propagated to Solr?
I am aware that Solr gets updated asynchronously from Riak KV. I scripted the test and this is noticeable - at the moment in my test I sleep for 2 seconds after updating before searching (or the search may not reflect the update). This is ok and expected. I wonder if there is a way for the client to "wait until" Solr is up-to-date to a certain CRDT context the client observed. Something like: * Client updates CRDT in KV and reads CRDT context C1; * Client polls Solr passing CRDT bucket-key and context C1. I am also aware that Riak has an AAE mechanism checking whether Solr is up to date to a certain snapshot of Riak KV, using hash trees, and repairing Solr if necessary. I understand that Riak employs an algorithm for checking discrepancies between KV and Solr that is prone to false positives - i.e. over-detecting differences hence over-repairing. I have not looked at the internals. Such AAE KV-Solr comparison algorithm has to be able to compare leaves of the tree too, that I understand each being a hash containing zero or more Riak KV objects. Hence from the bucket-key I shall be able to derive the hash of the Riak KV object, and use that for checking the corresponding element in Solr. This may require conversion from CRDT context to Riak KV object vclock but that would be ok - it would just include potential siblings in the Riak object (possible in corner cases even if CRDT I understand). I am designing a kind of document store, storing documents in Riak KV as CRDTs and using Solr for search. CRDT updates are infrequent - either by humans of potentially in batches of CRDT update operations accumulated while offline. The user, after performing updates, may perform a search. I am trying to understand if I can provide the user with the visibility of whether his/her updates are "supposed to have been reflected" in the search results already (or perform a sort of remedy to-be-defined). Thanks and regards Luca _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
