Alex, Custom schemas allow you to only index a subset of your object's data (saving disk space). They also allow data type specification, field copying (to have full-text search across your object easily), and several other features.
The Solr documentation has more information here: https://cwiki.apache.org/confluence/display/solr/Documents%2C+Fields%2C+and+Schema+Design -- Luke Bakken Engineer / CSE lbak...@basho.com On Sat, Sep 6, 2014 at 2:20 AM, Alex De la rosa <alex.rosa....@gmail.com> wrote: > 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 > _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
