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5 min readTo improve proximity search in Solr, you can adjust the proximity search parameters such as slop, boost, and phrase queries.Slop parameter: The slop parameter specifies how many positions apart the terms in a phrase query can be while still considering it a match. By adjusting the slop value, you can control the proximity of terms in the search results. Boost parameter: You can use the boost parameter to give more weight to proximity matches.
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5 min readTesting search accuracy in Solr involves checking the precision and recall of search results against a set of known queries and expected results. One common approach is to create a test suite of queries with corresponding expected search results. These queries should cover a range of scenarios, including common search terms, misspellings, synonyms, and complex queries.
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5 min readTo omit term frequency in Apache Solr, you can disable the term vector for a specific field in the schema definition. By setting the termVectors attribute to "false" for the field in question, you can prevent Solr from storing and using term frequencies for that field. This can be done by modifying the schema.xml file and reloading the core to apply the changes.
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4 min readTo disable caching for sort queries in Solr, you can set the parameter "cache" to "false" in the sort query itself. This will prevent Solr from caching the results of the sort query and will force it to re-calculate the sorting order every time the query is executed. By disabling caching for sort queries, you can ensure that the sorting order is always based on the most up-to-date data in the index.[rating:950fdea8-a2b6-4beb-b569-d3cc34b8411a]How to refresh the cache in Solr.
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9 min readTo index a PDF or Word document in Apache Solr, you will first need to configure Solr to support extracting text from these file types. This can be done by installing Tika content extraction library and configuring it to work with Solr. Once Tika is set up, you can then use the Solr ExtractingRequestHandler to parse the content of the PDF or Word document and index it in Solr.To do this, you will need to send a request to Solr with the PDF or Word document as the input.
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5 min readIn Solr, date fields can be sorted in ascending or descending order by specifying the field name with the appropriate sort order in the query. Date fields must be properly formatted in order to be sorted correctly. Solr allows for sorting date fields using the "sort" parameter in the query, with options for sorting by ascending or descending order.
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4 min readRunning Solr on an Amazon EC2 instance involves the following steps:Launch an EC2 instance with the desired configuration and AMI.SSH into the instance using a terminal or SSH client.Install Java on the EC2 instance if it is not already installed.Download and unzip the Solr distribution package on the instance.Start the Solr server using the command provided in the Solr documentation.Access the Solr web interface using the public DNS or IP address of the EC2 instance.
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3 min readTo count multiple fields with group by another field in Solr, you can use the "group" and "facet" features in Solr's query syntax.First, you can use the "group" parameter to group the results by a specific field. This will return the documents grouped by the specified field.Next, you can use the "facet" parameter to count the values of multiple fields within each group. You can use the "facet.field" parameter to specify which fields you want to count.
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4 min readTo change the format of defaults.last_index_time in Solr, you can modify the appropriate configuration file in your Solr installation. Typically, you would need to adjust the format in the solrconfig.xml file under the section. Look for the element within the section, and you should find the defaults.last_index_time setting there. You can change the format to suit your requirements by adjusting the value of the defaults.last_index_time property.
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4 min readTo remove the default sort order in Solr, you can modify the query parameters in your Solr query. By default, Solr sorts search results based on relevance score. To remove this default sort order, you can set the "sort" parameter to an empty string or remove it altogether from your query parameters. This will prevent Solr from automatically sorting the search results and display them in the order they are indexed in the Solr index.
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4 min readTo block all stream sources completely in Solr, you will need to configure the security settings in the Solr configuration file. This can be done by setting up authentication and authorization mechanisms to restrict access to specific stream sources. Additionally, you can also block IPs or specific users from accessing the stream sources by configuring access controls in the Solr configuration.