This blog explores how the luceneMatchVersion parameter in the solrconfig.xml works in Apache Solr. Dos and don’ts, and anything in between.
Common errors and warnings in manipulating feature stores and models in Solr. Pay attention also to JVM Heap and Zookeeper.
This blog post explains how to list, upload and delete feature and model stores in Apache Solr for learning to rank.
In this blog post we will briefly recap things we can’t do when using the alias field type in Elasticsearch.
Let’s quickly setup a Solr development environment for implementation and debugging purposes, with our 5 minutes how to!
The target of this blog post is to shed some light on the topic of request handlers and their relation with the QT request parameter in recent Apache Solr ( >= 7.0). Definitions A Request Handler is defined with a name and a class.It defines an API endpoint to handle and process http requests. The…
What happens with facets aggregations on fields when documents in the results have been filtered by Access Control Lists ?In such scenarios it is important to use the facet mincount parameter.That specifies the minimum count in the result set for a facet value to appear in the response: mincount=0, all the facet values present in…
Apache Solr distributed faceting feature has been introduced back in 2008 with the first versions of Solr (1.3 according to this jira[1]) . Until now, I always assumed it just worked, without diving too much into the details. Nowadays distributed search and faceting are extremely popular, you can find them pretty much everywhere (in the…
In this post we’ll cover two additional synonyms scenarios and we’ll try to summarise all previous tips in a coincise form. Following the approach of the previous posts [1] [2] [3], everything can be applied both to Apache Solr and Elasticsearch. Preconditions Synonyms and stopwords at query time: this is not just a “theoretical” constraint;…
The Context Brief recap of where we arrived in the preceding article: we had the following synonyms and stopwords settings: synonyms = {“out of warranty”,”oow”} stopwords = {“of”} Both of those filters were configured exclusively at query-time; the synonym filter first and then the stopwords filter. Using the built-in StopFilter we had a synonym detection…
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