.. _backend-module: Backend Modules =============== The backend modules are in the "APACHE SOLR" section available and can be unlocked for BE-users or/and groups. The modules help you to do maintenance tasks and get an overview on the system status: .. image:: ../Images/Backend/solr-backend_modules-listing.png During the next paragraphs we will go over the modules and explain, what could be done with them. Info Module ----------- Info Module shows you important infos about TYPO3 CMS and Solr state. It contains different info tabs described below: Connections ^^^^^^^^^^^ It lists all the for the site configured connections and their status. .. image:: ../Images/Backend/solr-backend-module_Info-Connections.png Statistics ^^^^^^^^^^ The **Search Statistics** module allows you to see Top Search Phrases with and without results. In addition it possible to see a complete listing with hits etc. ranked by Top search keywords. .. image:: ../Images/Backend/solr-backend-module_Info-Statistics.png Index Fields ^^^^^^^^^^^^ The **Index Fields** module allows you to see, how many documents you have in which solr core and which fields those documents have. .. image:: ../Images/Backend/solr-backend-module_Info-IndexFields.png Core Optimization ----------------- Core optimization Module is responsive for managing the behaviour of cores. By modifying of following things, you can also change the ranking and/or the results. .. _backend-module-stopword: Stop Words ^^^^^^^^^^ With the stopwords module you can define a list of words that should be excluded from the search. .. image:: ../Images/Backend/solr-backend-module_CoreOptimization-StopWords.png Common usecases are: * Very often occurring words like "the", "and" ... are excluded are filtered out because they are more or less "noize words". * You can add words that you want to avoid from indexing. .. _backend-module-synonyms: Synonyms ^^^^^^^^ With the synonyms module you can allow to find documents by words that do not occur in the document but have the same meaning: * E.g. smartphone, cellphone, mobile, mobilephone **Note:** The word that you want replace with a synonym needs to appear on **both** sides when you want to find it with the term itself later Example smartphone => smartphone, cellphone, mobile, mobilephone will match "smartphone, cellphone, mobile, mobilephone", when smartphone is missing on the right side, you will not find the document for smartphone anymore! .. image:: ../Images/Backend/solr-backend-module_CoreOptimization-Synonyms.png Index Queue ----------- The **Index Queue** module is the most important module. It allows you to do the following things: * Select item types and add them for indexing to the indexing queue. * See the fill state of the indexing queue. * Check the indexing queue for errors when the indexing of an items failed. * Start an instant indexing run, directly from the module. * Clear the indexing queue and re-queue items. .. image:: ../Images/Backend/solr-backend-module_IndexQueue.png Index Administration (earlier Index Maintenance) ------------------------------------------------ The **Index Administration** module allows you, to do the following administrative operations on your solr index: * Reload the solr configuration. * Empty your solr index. This removes all documents from the index of the current selected site. * Clear the indexing queue. .. image:: ../Images/Backend/solr-backend-module_IndexAdministration.png