This blog explores how the luceneMatchVersion parameter in the solrconfig.xml works in Apache Solr. Dos and don’ts, and anything in between.
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In this post we describe an approach to solve the problem of an application that requires both Full and Atomic Updates, using one of the powerful concepts in Object Oriented Programming: Polymorphism.
It was the spring of 2018, Andrea was strenuously working on a customer project, continuously tuning search configurations and checking the ground truth for certain queries manually. That was pretty much the standard at the time, the brilliant Quepid[1] from our friends at Open Source Connection helped in some use cases, but there was nothing…
This blog is a quick summary of my (subjective) experience at Haystack 2019 : the Search Relevance Conference, hosted in Charlottesville (Virginia, USA) from 24/04/2019 to 25/04/2019.References to the slides will be updated as soon as they become available. First of all my feedback on the Haystack Conference is extremely positive.From my perspective the conference…
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…
The Context The scenario description is quite simple: we want to use synonyms and stopwords. Following the path of our previous article, we will introduce an additional component in the analysis chain: a StopFilter, which, as the name suggests, removes a set of words from an incoming token stream. We will use the following data…
This flash blog post will address a very specific and common problem : how to manage entities/concepts composed by multiple terms in a vanilla Apache Solr/Elasticsearch instance ( no plugins or extensions to install). The (deployment) context An Elasticsearch or Apache Solr infrastructure where you cannot install third-party components (e.g. plugins, filters, query parsers). This can…
A Software Engineer is always required to give his customers a concrete evidence about deliverables quality. A Search Engineer deals with a specialisation of such generic Software Quality, which is called Search Quality. What is Search Quality? And why is it so important in a search infrastructure? After all, the “Software Quality” should be omni-comprensive,…
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