This is the place to list any terminology which is Solr specific, or in which the meaning in the Solr community may be subtly different from that of the general populous.
When adding to this page, please try to keep things in alphabetical order.
Auto-warming: What Solr does when it opens a new cache, and seeds it with key/val pairs based on the "top" keys from the old instance of the cache
Constraint: A viable method of limiting a set of objects (
![[WWW]](/wiki/classic/img/moin-www.png)
*) Facet: A distinct feature or aspect of a set of objects; "a way in which a resource can be classified" (
*) Filter: depending on context, may be:
Another word for "Constraint"
The "fq" param which constrains the results from a query without influencing the scores.
Specifically referring to the Lucene "Filter" class
Solr Home Dir: Also referred to as the "Solr Home Directory" or just "Solr Home" this is the main directory where Solr will look for configuration files, data, and plugins. Knowing which directory to use as the Solr Home is the one piece of information that Solr must either assume (the default is "./solr") or be configured using some mechanism beyond Solr's normal configuration files. An
example Solr Home is included in Solr releases and contains a README.txt explaining the directory structure. For more information on ways to override the default Solr Home, please read SolrInstall. Static warming: What users can do using newSearcher and firstSearcher event listeners to force explicit warming actions to be taken when one of these events happens -- frequently it involves seeding one or more caches with values from "static" queries hard coded in the solrconfig.xml