Although query parameters are often an easy method to create a Heliosearch/Solr requests by hand, they have a number of drawbacks: Inherently un-structured, requiring unsightly parameters like f.facet_name.facet.range.start=5 Inherently un-typed… everything is a string. More difficult to decipher large requests. … Continued
Several weeks ago Heliosearch v.08 was released, which included an early release of the Streaming Aggregation API. One of the main design goals for the Streaming API was to provide the foundation for the Heliosearch SQL Sub-Project. The Streaming API … Continued
Introduction Facet Types Testing Using Curl Terms Facet Query Facet Range Facet Related page: Facet Functions Related page: Sub-Facets Introduction Heliosearch has a completely re-written faceted search module with a structured JSON API to control the faceting commands. The structured … Continued
Traditional faceted search (also called guided navigation) involves counting search results that belong to categories (also called facet constraints). The new facet functions in Heliosearch/Solr extends normal faceting by allowing additional aggregations on document fields themselves. Combined with the new … Continued
Introduction Tuples, TupleStreams and Sorted Streams SolrStream Stream Decorators Streaming Set Operations Streaming Aggregation Distributed Searching, Sorting and Streaming: CloudSolrStream A Bottleneck Rears It’s Ugly Head! Distributed Aggregation: ParallelStream Scaling-up With SolrCloud Replicas Introduction This blog describes the new … Continued
Solr 4.10 and Heliosearch .07 have added a terms query (or terms filter) to more efficiently match many terms in a single field. A large number of terms are often useful for things like access control lists or security filters. … Continued
Native code faceting for Solr has just been added to Heliosearch, and benchmarks show an impressive 2x performance increase! This is faceting code written in C++ and statically compiled for maximum performance, and loaded into the JVM via JNI (Java … Continued
The filter caching features in Solr allow for precise control over how filter queries are handled in order to maximize performance. Solr has the ability to specify if a filter is cached, specify the order filters are evaluated, and specify … Continued
Lucene/Solr background Lucene has a segmented architecture – when a small amount of documents are added to an existing index, this will often just add an additional small segment to the index. Caching data structures at the segment level (e.g. … Continued
Macro Expansion is a new Heliosearch feature that does parameter substitution across all request parameters. The macro expansion is done at the same point in time that default parameters are applied (i.e. when the request reaches the correct solr request … Continued
