Apache Solr is a free, open-source search and analytics platform built on top of the Java-based Apache Lucene search library.
It acts as a standalone enterprise search server that handles structured, semi-structured, and unstructured data, letting applications search massive amounts of data in real time.
Key Features
• Full-Text Search: Performs deep searches across text, including matching phrases, wildcards, and spellchecking.
• Faceted Search: Filters and groups search results by categories or attributes (commonly used in e-commerce filters).
• Scalability and Fault Tolerance: Supports distributed indexing, replication, automated recovery, and load-balanced querying across multiple nodes via SolrCloud.
• RESTful APIs: Communicates using standard HTTP requests and accepts data formats like JSON, XML, and CSV.
• Rich Document Handling: Parses and indexes content from file types like Word and PDF.
Common Use Cases
• E-Commerce Catalogs: Powering fast product search and filter navigation on large online stores.
• Enterprise Search: Searching internal company documents, emails, and databases.
• Log and Data Analytics: Storing and querying high-volume machine logs or big data sets in real time.
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