Elias, comments inline. On Fri, Apr 20, 2012 at 12:15 PM, Elias Levy <fearsome.lucid...@gmail.com>wrote: > > I disagree. Yes, Riak is in general a simple system from an architecture > standpoint. But often the that simplicity is an obstacle, as you must > solve more complex problem using Riak as a base. >
I agree, distributed systems are hard, even when they are simple. > How to trade off between secondary indexes and search? > This is an area I am actively working on, it just isn't too visible to the outside world yet. I've recently started a prototype to fuse the 2i interface on top of Search's engine. > How to configure search indexes so it does not blow up when you got very > high volume low cardinality or very high cardinality terms (faking > multicolumn indexes and bucketing)? > I'm also doing work on this to make conjunction queries safer, do less work, and have better latencies. A query that produces a "large" result set is still problematic but a conjunction of small and large result sets will be much, much better. I saw very significant improvement on a particular work load but I need to do more benchmarking on "real" hardware. https://github.com/rzezeski/riak_search/tree/rz-conjunction https://github.com/rzezeski/riak_search/tree/rz-no-unnecessary-work > How to reindex data in the store? > How to repair data in the store if you loose a node without the Enterprise > version? > These are two HUGE pain points in Search. Currently it is my #1 problem to address and it will be a multi-faceted approach. The first thing I'm doing is building a repair cmd which will allow you to specify a broken partition and it will smartly rebuild it based on the surrounding partitions. I've already done a prototype that passes some basic tests but it has diverged into some riak_core work to help support it. These are the prototype branches: https://github.com/basho/riak_search/tree/rz-repair-cmd https://github.com/basho/riak_core/tree/rz-repair-cmd -Z
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