Hi there, Can somebody explain the use for custom search schemas? I still don't get why would I want to have a custom schema if the default schema seems to be able to get me the info of all the fields i have in my object.
Thanks! Alex On Fri, Aug 29, 2014 at 4:48 PM, Alex De la rosa <alex.rosa....@gmail.com> wrote: > Hi Sean, > > Seems I was wrong, that makes total sense now that you exposed it, looked > a "too good" feature to me, but seems is not that easy. > > By the way, how does "schemas" really work for Riak Search? I went back > and read the documentation but didn't see a real difference from using the > default schema. > > Thanks! > Alex > > > On Fri, Aug 29, 2014 at 3:36 PM, Sean Cribbs <s...@basho.com> wrote: > >> Alex, >> >> In short, no, you can't create custom types through schemas. Schemas >> currently only refer to Riak Search 2. >> >> We would love that too, but it hasn't happened yet. The problem is not >> conceiving of a data type but making its behavior both sensible and >> convergent in the face of concurrent activity or network partitions. >> For instance, say that two tweets come in around the same time. Who >> goes first in the "stack" you described? How can multiple independent >> copies reason about which ones to drop from the bottom of the stack to >> keep it bounded to 100? What happens if a replica is separated from >> the others for a while and has really stale entries, is it valid to >> serve those to a user? What happens when one replica pushes an element >> and another one pops it at the same time? >> >> These sound like they might be trivial problems, but they are >> incredibly hard to reason about in the general case. You have to >> reason about the ordering of events, the scope of their effects, and >> decide on a least-surprising behavior to expose to the user. Although >> we have given a pretty familiar/friendly interface to the data types >> shipping in 2.0, their behavior is strictly different from the types >> you would use in a single-threaded program in local memory. >> >> On Thu, Aug 28, 2014 at 4:47 PM, Alex De la rosa >> <alex.rosa....@gmail.com> wrote: >> > Hi there, >> > >> > Correct me if I'm wrong, but I think I read somewhere that custom >> data-types >> > can be created through schemas or something like that. So, apart from >> > COUNTERS, SETS and MAPS we could have some custom defined ones. >> > >> > I would love to have a STACKS data-type that would work like a FIFO >> stack, >> > so I could save the last 100 objects for some action. Imagine we are >> > building Twitter where millions of tweets are sent all the time, but we >> want >> > to quickly know the last 100 tweets for a user. Imagine something like: >> > >> > obj.stacks['last_tweets'].add(id_of_last_tweet) >> > >> > IN: last_tweet ---> STACK_OF_100_TWEETS ---> OUT: older than the 100th >> goes >> > out >> > >> > Is this possible? If so, how to do it? >> > >> > Thanks and Best Regards, >> > Alex >> > >> > _______________________________________________ >> > riak-users mailing list >> > riak-users@lists.basho.com >> > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >> > >> >> >> >> -- >> Sean Cribbs <s...@basho.com> >> Software Engineer >> Basho Technologies, Inc. >> http://basho.com/ >> > >
_______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
