What is Solr and how it can benefit your business?
Manoj Kumar
INTRODUCTION – Apache Solr is a NoSql based text search engine with the capacity to run blazing fast searches along with loads of functionalities such as faceting, grouping, collapsing, fuzzy searching, boosting, relevancy tuning, etc. Its an extrapolation of Lucene-based search and is developed based …
RequestHandlers and SearchComponents in SolrConfig – Ultimate Solr Guide
After the <query> section of solrconfig.xml, request handlers and search components are configured.A request handler processes requests coming to Solr. These might be query requests or index update requests. You will likely need several of these defined, depending on how you want Solr to handle the various requests you will …
Circuit Breakers – Ultimate Solr Guide
Solr’s circuit breaker infrastructure allows prevention of actions that can cause a node to go beyond its capacity or to go down. The premise of circuit breakers is to ensure a higher quality of service and only accept request loads that are serviceable in the …
Distributed Search – Ultimate Solr Guide
When using traditional index sharding, you will need to consider how to query your documents.It is highly recommended that you use SolrCloud when needing to scale up or scale-out. The setup described below is legacy and was used prior to the existence of SolrCloud. SolrCloud provides …
Solr caches – Ultimate Solr Guide
The settings in this section affect the way that Solr will process and respond to queries. These settings are all configured in child elements of the <query> element in solrconfig.xml. Caches Solr caches are associated with a specific instance of an Index Searcher, a specific view of an …
Collapse and Expand Results – Ultimate Solr Guide
The Collapsing query parser and the Expand component combine to form an approach to grouping documents for field collapsing in search results. The Collapsing query parser groups documents (collapsing the result set) according to your parameters, while the Expand component provides access to documents in …
Spell Checking – Ultimate Solr Guide
The SpellCheck component is designed to provide inline query suggestions based on other, similar, terms. The basis for these suggestions can be terms in a field in Solr, externally created text files, or fields in other Lucene indexes. Configuring the SpellCheckComponent Define Spell Check in …
MoreLikeThis – Ultimate Solr Guide
The MoreLikeThis search component enables users to query for documents similar to a document in their result list. It does this by using terms from the original document to find similar documents in the index. There are three ways to use MoreLikeThis. The first, and most common, …
Transforming Result Documents – Ultimate Solr Guide
Document Transformers modify the information returned about documents in the results of a query. Using Document Transformers When executing a request, a document transformer can be used by including it in the fl parameter using square brackets, for example: fl=id,name,score,[shard] Some transformers allow, or require, local parameters …
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