Riak_kv sits atop riak_ensemble, which is a multipaxos implementation. On Tue, Mar 8, 2016 at 6:41 PM, Agung Laksono <agung.laks...@surya.ac.id> wrote: > Thank you for answering the question. > > @Sargun: Right now, I'm interested in testing Riak-ensemble > with a distributed model checker like SAMC. In the cluster membership > in the documentation, I found steps to activate a cluster, add a node, > create an ensemble. However, is there any example to implement those > processes? > > And one more question: Does Riak-kv implement multi-paxos or paxos-like > protocols? > > Actually, my target is so simple, I just need to be able to put some > key-value by > executing the multi-paxos. > > On Tue, Mar 8, 2016 at 11:39 PM, Sargun Dhillon <sar...@sargun.me> wrote: >> >> If you want to learn to use riak_ensemble the library, the >> documentation that Joe put together (and others) >> https://github.com/basho/riak_ensemble/blob/develop/doc/Readme.md >> >> There's real world usage of the code here: >> -https://github.com/basho/riak_kv/blob/develop/src/riak_kv_ensembles.erl >> >> Basically as a user, you have to create the root ensemble, add all >> your nodes to it, and then create your individual, "sub-ensembles". >> >> You need to implement a backend, and this is a rough sketch of one: >> >> https://github.com/basho/riak_ensemble/blob/develop/src/riak_ensemble_basic_backend.erl >> >> Due the design of Riak ensemble, and the fact that's it's effectively >> a bunch of individual vertical Paxos group in conjunction with its >> usage of single decree, over multi-decree paxos it has some >> interesting fault-recovery semantics. An example of this is the >> adjustable paranoia level -- it has some strong failure-recovery >> semantics, so in the highest paranoia mode, if you have 5 nodes, and >> one fails. When that node comes back, it will have to sync with 3/5 of >> the other nodes to be considered good to go. >> >> Even with this, riak ensemble is a pretty easy, fun library to use. >> The fact that it's a composition of single decree paxos groups it >> makes it much simpler to understand, and you can implement SMR atop >> it, like so: https://github.com/sargun/riak_ensemble/commits/sargun/redis >> (see the few extra commits) >> >> On Tue, Mar 8, 2016 at 8:19 AM, Carlos González Florido >> <carlosj...@gmail.com> wrote: >> > You may have a look at nkbase[1] that includes riak_ensemble as one of >> > it >> > working models. >> > >> > [1] >> > >> > https://github.com/NetComposer/nkbase/blob/master/doc/strong_consistency.md >> > >> > Carlos González >> > NetComposer >> > >> > >> > On Mon, Mar 7, 2016 at 4:48 AM, Agung Laksono >> > <agung.laks...@surya.ac.id> >> > wrote: >> >> >> >> Hi Basho developer, >> >> >> >> I've seen the video that you guys present about rian_ensemble. I am >> >> interesting to implement riak_ensemble in the production environment in >> >> the >> >> future. After reading the >> >> documentation(https://github.com/basho/riak_ensemble/tree/develop/doc), >> >> I >> >> still couldn't understand how it's work and implement it. Could you >> >> tell me >> >> in a simple way to implement it in the single node to simulate multiple >> >> nodes or 3 real nodes? >> >> >> >> So far, I can compile riak_ensemble via rebar and run >> >> application:ensure_all_started(riak_ensemble). But I don't know what >> >> should >> >> I do after that(sent K/V, communicate to other nodes, etc) >> >> >> >> Thank you in advance. >> >> >> >> -- >> >> Warm Regards, >> >> >> >> Agung Laksono >> >> >> >> _______________________________________________ >> >> riak-users mailing list >> >> 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 >> > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >> > > > > > > -- > Warm Regards, > > Agung Laksono
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