This topic provides an overview of retrieval configuration and policy management.
Features
OpenSearch allows you to configure indexes for online applications and offline applications and provides text analyzers and custom text analyzers. For more information, see Configure retrieval.
OpenSearch provides high search performance by dividing the entire sort process into two phases: rough sort and fine sort. Rough sort is the process of selecting the top N high-quality documents from all documents that are retrieved. Then, the top N high-quality documents are scored and sorted in the fine sort process. This way, you can obtain the documents that best match your requirements. Rough sort affects the search performance, whereas fine sort affects the ultimate sort results. Therefore, you can roughly sort documents in an efficient and simple manner based only on the key factors used for fine sort. OpenSearch allows you to configure and manage sort policies and provides basic sort functions and business sort functions. You can use Cava to develop sort plug-ins. For more information, see Manage policies.