Turns out this is happening because the mapping needs to be applied to the type: I tried applying it to the wrong thing: curl -XPUT 10.160.86.134:9200/products/_mapping -d ‘{ It needs to be applied to the type like so: curl -XPUT 10.160.86.134:9200/products/product/_mapping -d ‘{ It’s sad that a simple google search couldn’t answer this. Also the … Read more
From the SolrCloud Documentation Collection: A single search index. Shard: A logical section of a single collection (also called Slice). Sometimes people will talk about “Shard” in a physical sense (a manifestation of a logical shard) Replica: A physical manifestation of a logical Shard, implemented as a single Lucene index on a SolrCore Leader: One … Read more
The answers you are looking for really can not be found using lucene alone. You need ranking and grouping algorithms to filter and understand the data and how it relates. Lucene can help you get normalized data, but you need the right algorithm after that. I would recommend you check out one or all of … Read more
/?q=query&fl=field1,field2,field3
The word “index” gets abused a bit in Elasticsearch — applies to too many things. To explain: index An “index” in Elasticsearch is a bit like a database in a relational DB. It’s where you store/index your data. But actually, that’s just what your application sees. Internally, an index is a logical namespace that points … Read more
Just an update to my earlier answer – since there was so much discussion I didn’t want this update to get lost. You can download it here:
I once listened to an interview with author Ursula K. LeGuin about fiction writing. The interviewer asked her about authors who work in different genre of writing. What makes one author a romance writer, and another a mystery writer, and another a science fiction writer? LeGuin responded by explaining: Genre is about marketing, not about … Read more
First, Solr doesn’t use B-trees. A Lucene (the underlying library used by Solr) index is made of a read-only segments. For each segment, Lucene maintains a term dictionary, which consists of the list of terms that appear in the segment, lexicographically sorted. Looking up a term in this term dictionary is made using a binary … Read more
There are 3 ways to do this. The first way is to construct a query manually, this is what QueryParser is doing internally. This is the most powerful way to do it, and means that you don’t have to parse the user input if you want to prevent access to some of the more exotic … Read more