Definition of Solr

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Solr is a high-performance, full-text, retrieval server based on the Apache Lucene. Solr extends Lucene and provides more diversified query languages than Lucene. It implements configurability and scalability, optimizes query performance, and provides thorough function management GUIs. It is an excellent full-text retrieval engine.

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Functions of the Solr analyzer
Solr provides several Chinese analyzers. By default, the standard analyzer is used. The standard analyzer divides Chinese phrases into characters, and uses English characters and digits as a whole. If a third-party analyzer needs to be configured, the JAR package provided by the third party and the corresponding word library need to be imported.

What is the concept of Solr?
Solr is a high-performance, full-text, retrieval server based on the Apache Lucene. Solr extends Lucene and provides more diversified query languages than Lucene. It implements configurability and scalability, optimizes query performance, and provides thorough function management GUIs. It is an excellent full-text retrieval engine.

Definition of Kafka
Kafka is a distributed, partitioned, and replicated message publishing and subscription system that provides features similar to the Java Message Service (JMS). Kafka features message persistence, high throughput, distribution, multi-client support, and real-time processing, and applies to online and offline message consumption. It is ideal for Internet service data collection scenarios, such as conventional data collection, active website tracing, aggregation of operation data in statistics systems (monitoring data), and log collection.

Definition of Tomcat
Tomcat is a free-of-charge, lightweight, open source web application server developed by Apache Software Foundation, Sun and other companies, and individuals. Gaining support from Sun, Tomcat complies with the latest Servlet and JavaServer Page (JSP) specifications. It features advanced technology, stable performance, and good scalability, and occupies a small number of system resources during running. As a result, Tomcat applies to small- and medium-sized systems and scenarios with a few concurrent users. An HTTP server embedded in Tomcat enables Tomcat to work as a web server. It provides a configuration management tool and supports XML configuration files. Tomcat is different from the Apache web server, which is an HTTP server using C language.

Definition of Flume
Flume is a distributed, highly reliable, and HA massive log aggregation system. It supports custom data transmitters for data collection. Flume also processes data roughly and writes data to customizable receivers.

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