Mongo → services mongo
MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need
Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Server Side Public License (SSPL).
Main features
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Ad-hoc queries
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MongoDB supports field, range query, and regular-expression searches.
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Indexing
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Fields in a MongoDB document can be indexed with primary and secondary indices or index.
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Replication
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MongoDB provides high availability with replica sets.
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Load balancing
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MongoDB scales horizontally using sharding.
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File storage
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MongoDB can be used as a file system, called GridFS, with load balancing and data replication features over multiple machines for storing files.
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Aggregation
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MongoDB provides three ways to perform aggregation: the aggregation pipeline, the map-reduce function, and single-purpose aggregation methods.
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Map-reduce can be used for batch processing of data and aggregation operations.
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Server-side JavaScript execution
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JavaScript can be used in queries, aggregation functions (such as MapReduce), and sent directly to the database to be executed.
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Capped collections
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MongoDB supports fixed-size collections called capped collections. This type of collection maintains insertion order and, once the specified size has been reached, behaves like a circular queue.
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Doc origin wikipedia
