A few minutes ago changes marked as SOLR-1873 in the Apache JIRA system were added the trunk branch of Lucene and Solr SVN repository This means that the developer version of Solr was expanded with the functionality called Solr Cloud – the ability of managing the distributed Solr deployment from the administration pages.
We will try to write something about these new functionality as soon as possible 😉
At the Apache Lucene Eurocon 2010 conference, which took place in May this year, Andrew Białecki in his presentation talked about how to obtain satisfactory search results when using early termination search techniques. Unfortunately the tool he mentioned, was not available in Solr – but it changed.
While observing Solr mailing lists we can spot a functionality called Solritas. Sounds strange ? What kind of functionality is it ? How we can use it ? To see the answers to these questions, I invite you to read the rest of the entry.
FieldCollapsing, or in other words grouping of search results has just been commited to the svn repository. I decided to take a look at this functionality and see how it works.
Solrconfig.xml file is another file that defines the behavior Solr. Unlike a file that describes the structure of the index file solrconfig.xml determines the functionality available in Solr. Just like in the case schema.xml file we can distinguish a number of standard mistakes made by those who implement Solr, and I’m not talking only about people who have little experience with Solr. In order to learn some of those mistakes I invite you to read the following entry.
I made a promise and here it is – the entry on the most common mistakes when designing Solr index, which is when You create or modify the schema.xml file for Your system implementation. Feel free to read on 😉
Faceting is one of the ways to categorize the content found in the process of information retrieval. In case of Solr this is the division of set of documents on the basis of certain criteria: content of individual fields, queries or on the basis of compartments or dates. In today’s entry I will try to some scope on the possibility of using the faceting mechanism, both currently available in Solr 1.4.1, as well as what will be available in the future.
One of the configuration files that describe each implementation Solr is schema.xml file. It describes one of the most important things of the implementation – the structure of the data index. The information contained in this file allow you to control how Solr behaves when indexing the data, or when making queries. Schema.xml is not only the very structure of the index, is also detailed information about data types that have a large influence on the behavior Solr, and usually are treated with neglect. This entry will try to bring some insight about schema.xml.
Solr recently received another small, but worth mentioning functionality – another response format available in standard distribution – CSV response format. I decided to write a short note about it.
In the majority of system implementations I dealt with, sooner or later, there was a problem – search results tunning. One of the simplest ways to improve the search results quality was phrase boosting. Having the three most popular query parsers in Solr and the variety of parameters to control them I though it will be a good idea to check how they behave and how they affect performance.