What is index cardinality and why is it important? How does MongoDB handle queries when no suitable index is available?

Percona Server for MongoDB 8.0.4-2 (2025-02-19) # application.yml spring: data: mongodb: uri: mongodb://mongo:27017/fdp. The ... Index, you can deploy both FDP and FDP Index client applications. The ... Indexes ... Indexes support efficient execution of queries in MongoDB. Without indexes, MongoDB must scan every document in a collection to return query results. A database index is a special data structure that provides faster access to data and helps create highly performant applications. Jan 19, 2021 ... TTL indexes are special single-field indexes that MongoDB can use to automatically remove documents from a collection after a certain amount of ... Jun 10, 2019 ... In this article, we'll provide instructions for creating indexes for a MongoDB collection using Python. You can specify indexes on embedded documents just like you do on normal documents. When Doctrine creates the indexes for a document it will also create all the ... Indexes · default _id index: MongoDB creates a unique index on the _id field during the creation of a collection. · single field: MongoDB supports the creation of ... b. -, bson, BSON (Binary JSON) Encoding and Decoding. bson.binary, Tools for representing binary data to be stored in MongoDB. Unique indexes ensure that the indexed fields do not store duplicate values. By default, MongoDB creates a unique index on the _id field during the creation of ...