Hinted handoff from adding a node, removing a node or failing a node? Could probably get some idea from a ring handler, hinted handoff could likely very well trigger its own event as well without a large modification to riak_core
On Sunday, July 24, 2016, Sargun Dhillon <sar...@sargun.me> wrote: > It might also make a lot of sense to roll your own secondary indices. That > is, have a CRDT set represent the primary key of the rows which meet the 2i > condition. In that, you can query the CRDT set, and ensure some level of > consistency. There are further tricks to be played here if interested. > > I'm curious, what is your data model? > > On Fri, Jul 22, 2016 at 11:01 AM, Alexander Sicular <sicul...@gmail.com > <javascript:_e(%7B%7D,'cvml','sicul...@gmail.com');>> wrote: > >> Take a look at the "pw" and "pr" tunable consistency options for gets and >> puts. The base level of abstraction in Riak is the virtual node - not the >> physical machine. When data is replicated it is replicated to a replica set >> of virtual nodes. Those virtual nodes have primary and secondary (due to >> failures) allocations to physical machines. When using "pr" and "pw" >> options you instruct Riak to only service the request from virtual nodes >> that are residing on their primarily allocated physical machines. In short, >> by abusing pr/pw you can infer the state of your cluster from your >> application. >> >> Obviously, this is not foolproof. There may also be additional 2i >> specific issues to consider. Nevertheless, I always liked this trick. >> >> Also, review this four part series on tunable consistency : >> >> >> http://basho.com/posts/technical/understanding-riaks-configurable-behaviors-part-1/ >> http://basho.com/posts/technical/riaks-config-behaviors-part-2/ >> http://basho.com/posts/technical/riaks-config-behaviors-part-3/ >> http://basho.com/posts/technical/riaks-config-behaviors-part-4/ >> >> -Alexander >> >> >> @siculars >> http://siculars.posthaven.com >> >> Sent from my iRotaryPhone >> >> On Jul 22, 2016, at 12:28, Hawk Newton <hawk.new...@gmail.com >> <javascript:_e(%7B%7D,'cvml','hawk.new...@gmail.com');>> wrote: >> >> I've got a use case in which I'd like to use a secondary index but can't >> tolerate partial result sets caused by hinted handoffs. I'm not currently >> running riak search and, as this is a fringe case, would prefer not add >> the >> additional overhead and complexity if I can help it. >> >> I'd like to detect a hinted handoff operation and throw a 503, if >> possible. >> >> Does anyone know of a way I can programatically detect if a hinted handoff >> is underway without having to shell out to riak-admin (yuck!) and parse >> the >> results? I'm running riak 2.0.5 at the moment. >> >> Thank you in advance. >> >> -- Hawk >> >> >> >> -- >> View this message in context: >> http://riak-users.197444.n3.nabble.com/Detecting-Hinted-Handoff-tp4034489.html >> Sent from the Riak Users mailing list archive at Nabble.com >> <http://nabble.com>. >> >> _______________________________________________ >> riak-users mailing list >> riak-users@lists.basho.com >> <javascript:_e(%7B%7D,'cvml','riak-users@lists.basho.com');> >> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >> >> >> _______________________________________________ >> riak-users mailing list >> riak-users@lists.basho.com >> <javascript:_e(%7B%7D,'cvml','riak-users@lists.basho.com');> >> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >> >> >
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