ubuntuask.com
-
6 min readTo create a custom field in Solr response, you need to modify the Solr schema.xml file. You can add a new field with the desired name and attributes, such as data type and indexing options. After making changes to the schema, you will need to reload the core or restart Solr to apply the changes. Once the custom field is defined in the schema, you can index documents with values for that field and retrieve them in the search response.
-
7 min readApache Solr is highly scalable and is designed to handle large amounts of data efficiently. The scalability of Solr is achieved through a distributed architecture that allows for horizontal scaling by adding more nodes to the cluster.Solr uses a sharding mechanism to distribute the data across multiple nodes in the cluster. Each node in the cluster is responsible for a subset of the data, and queries are distributed across multiple nodes to execute in parallel, improving performance.
-
7 min readIn Apache Solr, handling multiple currencies can be accomplished by including a currency field in your schema design. This field can be used to store the currency code or symbol for each document. When querying the data, you can then use this field to filter or sort results based on the currency being used.One approach is to create a separate field for each currency, allowing you to store the price of a product in multiple currencies.
-
5 min readTo increment an indexed field in Solr, you can use the Atomic Update feature provided by Solr. This feature allows you to update a specific field without having to reindex the entire document. To increment a field, you can send a request to Solr with the document ID and the updated value for the field you want to increment. Solr will then increment the field by the specified value.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.