Smart research using Elasticsearch
Fine-Tuning
The min_term_freq
parameter specifies a threshold for the selection of a word in the reference document with the more_like_this
function. If min_term_freq
is set to the default value 2
, a word must occur there at least twice to make its way into the list of words with which other documents are compared later. The second parameter max_query_terms
is the maximum number of words from the list in the original document that the algorithm selects to use later in the query.
For anyone wanting to find out about other methods for fine-tuning the search engine, I would recommend the O'Reilly book on the topic [1]. It explains how to deal with Elasticsearch using examples, provides tips for scaling in clusters, and takes a look behind the scenes, where the Apache Lucene search engine is at work.
Infos
- Gormley, Clinton and Zachary Tong, Elasticsearch: The Definitive Guide: O'Reilly, 2015.
- Elasticsearch: https://www.elastic.co
- "Perl: Elasticsearch" by Mike Schilli, Linux Magazine, issue 162, pg. 66, 2014: http://www.linux-magazine.com/Issues/2014/162/Perl-Elasticsearch/(language)/eng-US
- Tf-idf: https://en.wikipedia.org/wiki/Tf%E2%80%93idf
- More Like This Query: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-mlt-query.html
- Listings for this article: ftp://ftp.linux-magazine.com/pub/listings/magazine/182/
« Previous 1 2 3
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you've found an article to be beneficial.
News
-
PipeWire 1.0 Officially Released
PipeWire was created to take the place of the oft-troubled PulseAudio and has finally reached the 1.0 status as a major update with plenty of improvements and the usual bug fixes.
-
Rocky Linux 9.3 Available for Download
The latest version of the RHEL alternative is now available and brings back cloud and container images for ppc64le along with plenty of new features and fixes.
-
Ubuntu Budgie Shifts How to Tackle Wayland
Ubuntu Budgie has yet to make the switch to Wayland but with a change in approaches, they're finally on track to making it happen.
-
TUXEDO's New Ultraportable Linux Workstation Released
The TUXEDO Pulse 14 blends portability with power, thanks to the AMD Ryzen 7 7840HS CPU.
-
AlmaLinux Will No Longer Be "Just Another RHEL Clone"
With the release of AlmaLinux 9.3, the distribution will be built entirely from upstream sources.
-
elementary OS 8 Has a Big Surprise in Store
When elementary OS 8 finally arrives, it will not only be based on Ubuntu 24.04 but it will also default to Wayland for better performance and security.
-
OpenELA Releases Enterprise Linux Source Code
With Red Hat restricting the source for RHEL, it was only a matter of time before those who depended on that source struck out on their own.
-
StripedFly Malware Hiding in Plain Sight as a Cryptocurrency Miner
A rather deceptive piece of malware has infected 1 million Windows and Linux hosts since 2017.
-
Experimental Wayland Support Planned for Linux Mint 21.3
As with most Linux distributions, the migration to Wayland is in full force. While some distributions have already made the move, Linux Mint has been a bit slower to do so.
-
Window Maker Live 0.96.0-0 Released
If you're a fan of the Window Maker window manager, there's a new official release of the Linux distribution that champions the old-school user interface.