After the very warm reception of the first year, the fourth London Information Retrieval Meetup is approaching (11/02/2020) and we are excited to add more details about our speakers and talks!The event is free and you are invited to register : https://www.eventbrite.com/e/london-information-retrieval-meetup-february-2020-tickets-89056738101 Our first speaker is Anna Ruggero, one of our R&D software engineers: Anna … Continue reading London Information Retrieval Meetup February
Digging in the Solr code: 5 minutes howto
Let’s say you need to write a component, a request handler, or in general some piece of custom code that needs to be plugged into Solr. Or, you need to have a deeper understanding about some Lucene/Solr internals, following what actually happens within the code. I know: unit tests, integration tests, everything to make … Continue reading Digging in the Solr code: 5 minutes howto
Road to Rated Ranking Evaluator Enterprise
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 … Continue reading Road to Rated Ranking Evaluator Enterprise
The Request Handlers Jungle – handleSelect and qt Parameter
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 … Continue reading The Request Handlers Jungle – handleSelect and qt Parameter
London Information Retrieval Meetup October
After the very warm reception of the first and second edition, the third London Information Retrieval Meetup is approaching (21/10/2019) and we are excited to add more details about our speakers and talks!The event is free and you are invited to register : https://www.eventbrite.com/e/london-information-retrieval-meetup-october-tickets-74403100677 Our second speaker is Andrea Gazzarini, our founder and software engineer: … Continue reading London Information Retrieval Meetup October
Apache Solr ChildDocTransformerFactory: How to Build Complex ChildFilter Queries
When using nested documents and the Apache Solr Block Join functionality it is a common requirement to query for an entity (for example the parent entity) and then retrieve for each search result all(or some of) the related children. Let's see the most important aspects of such functionality and how to apply complex queries when … Continue reading Apache Solr ChildDocTransformerFactory: How to Build Complex ChildFilter Queries
London Information Retrieval Meetup June
After the very warm reception of the first edition, the second London Information Retrieval Meetup is approaching (25/06/2019) and we are excited to add more details about our speakers and talks!The event is free and you are invited to register : https://www.eventbrite.com/e/london-information-retrieval-meetup-june-tickets-62261343354Our first speaker is René Kriegler, freelance search consultant and search engineer : René Kriegler René has … Continue reading London Information Retrieval Meetup June
Haystack 2019 Experience
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 … Continue reading Haystack 2019 Experience
London Information Retrieval Meetup
The London Information Retrieval Meetup is approaching (19/02/2019) and we are excited to add more details about the speakers and talks!The event is free and you are invited to register :https://www.eventbrite.com/e/information-retrieval-meetup-tickets-54542417840After Sambhav Kothari, software engineer at Bloomberg and Elia Porciani, R&D software engineer at Sease, our last speaker is Andrea Gazzarini, founder and software engineer at Sease … Continue reading London Information Retrieval Meetup
Apache Solr Facets and ACL Filters Using Tag and Exclusion
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 … Continue reading Apache Solr Facets and ACL Filters Using Tag and Exclusion