![]() Before you can do so however you need create config files, directories and set permissions. You can now issue the following command to restart Tomcat and in turn Solr: service tomcat6 restartĪt this point you’re ready to start creating new cores. ![]() The following commands ensure Tomcat has write permissions to needed directory and file chown tomcat6.tomcat6 /usr/share/solr/solr.xml As cores are added or removed, this file is updated. Next, you need to ensure that Tomcat is able to write out new versions of the solr.xml file. Using your favorite text editor create a file called solr.xml at /usr/share/solr with the following contents: ![]() Under normal operations, you should never need to restart Tomcat. Once you’ve done this, you only need to restart under certain conditions. These directories contain the solr home director, data directory and configuration data respectively.Įnabling multicore is as simple as creating solr.xml in the /usr/share/solr directory and restarting Tomcat. Solr itself lives in three spots, /usr/share/solr, /var/lib/solr/ and /etc/solr. At this point, you have a fully working Solr installation that only needs to be tweaked for your environment. This will install Solr from Ubuntu’s repositories as well as install and configure Tomcat. On your Ubuntu server, become root using ‘sudo su -‘ and issue the following command: apt-get install solr-tomcat curl -y This post assumes you have already installed Ubuntu server with internet access as well having a basic understanding of how to use Ubuntu and Linux in general. Individual indexes are still fairly isolated, but you can manage them as a single application, create new indexes on the fly by spinning up new SolrCores, and even make one SolrCore replace another SolrCore without ever restarting your Servlet Container.Īlthough I’ve setup a few instances of Solr using tomcat, I thought I’d write out just how easy it is to get Solr up and running using Ubuntu Server 10.04 as well as talk about some of the scripts I’ve written to make the process of adding, removing and reloading cores easier. Multiple cores let you have a single Solr instance with separate configurations and indexes, with their own config and schema for very different applications, but still have the convenience of unified administration. Multicore in the context of Solr simply means running multiple instances of Solr using the same servlet container allowing for separate configurations and indexes per core while still allowing administration through one interface. One of the features of Solr is called multicore. Solr’s powerful external configuration allows it to be tailored to almost any type of application without Java coding, and it has an extensive plugin architecture when more advanced customization is required. Solr uses the Lucene Java search library at its core for full-text indexing and search, and has REST-like HTTP/XML and JSON APIs that make it easy to use from virtually any programming language. Solr is written in Java and runs as a standalone full-text search server within a servlet container such as Tomcat. ![]() Solr is highly scalable, providing distributed search and index replication, and it powers the search and navigation features of many of the world’s largest internet sites. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document (e.g., Word, PDF) handling. Solr is the popular, blazing fast open source enterprise search platform from the Apache Lucene project. UPDATE: New post on getting Multicore Solr 3.4 running on Ubuntu 10.04īeen working a lot lately with the Apache Solr project. ![]()
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