Version
You can check the version of Solr that you are using by navigating to the root directory of your Solr installation
and running the command:
solr -v
This will display the version of Solr that you are currently running.
About Apache Solr
Solr is a NoSQL data browser. It was developed by Yonik Seeley in 2007, and it is part of the Lucene project. Solr
functions as a browser,
and it runs on a server. Solr has a particular way of functioning that you need to understand before diving into its
uses or its specific features.
First, Solr Indexes the information that is fed into it. It transforms it into a format that can be machine-read.
Then, the user inputs a query and the Solr client interprets it. A query can be in the form of keywords or even have
the capability of being images.
Then, Solr maps the query to the data that is stored within and identifies the proper result. Finally, comes the
process of ranking,
which is exactly what one might expect when hearing the word. The outputs are ranked per relevance, or likelihood that
the query was referring
to that document or set of documents in particular. As Solr is a data browser, and not necessarily a server, it can be
integrated with other
tools like Cassandra, making it a powerful combination that integrates brilliant features from multiple
developers.
Solr has uses in many content-related industries, where the data stored can be strings, numbers, etc. But also
extremely likely to be stored
in the form of text documents, images, among many other formats that these companies may necessitate.
This browser has specific features that set it apart from others. First, the explained four-step process is unique
to Solr,
and it involves techniques that make it extremely quick for retrieving information, where it can be then analyzed by
another piece of software,
again pointing to the big integration advantages that come with Solr. Another very interesting feature, maybe not
native to the software itself,
is that Solr belongs to an Apache project, which means that it is open-source. This is good because Solr has a
network of both users
and a professional support community that can help solve issues and offer help to anyone that might need it.
Releases
Solr finished development and published its first stable version in 2007, but it underwent development in 2004,
where it evolved for two years
and was donated to the Apache Software Foundation. The software underwent constant evolution to be where it is
today.
We are currently on the 8.8.2 version, released on the 12th of April of the present year of 2021. Solr is expected
to develop new updates
and content, so it is safe to think support and feature development will continue for years to come.