From :http://blog.mongodb.org/post/33700094220/how-mongodbs-journaling-works how does journaling work? Your disk has your data files and your journal files, which we’ll represent like this: When you start upmongod, it maps your data files to ashared view. Basically, the operating system...
we can say that it’s in static forms. Data at rest database encryption is also called as transparent data encryption its abbreviation is TDE. MongoDB uses the AES 256-bit standard encryption algorithm to encrypt the database. MongoDB uses the same encryption cipher key to encrypt as well ...
MongoDB unwind operator is used to deconstructing the array field from input to output documents, it will be used for each element from the document. The difference between input and output document in unwind operator is very simple, the output document value of a field of array is replaced b...
Leading organizations like Uber, Coinbase, Forbes, and Accenture use MongoDB. Its robust features, such as real-time ad-hoc queries, built-in indexing, load balancing, and seamless scalability, stand out. Whether deployed on-prem or in the cloud via MongoDB Atlas, it enables efficient data ...
In MongoDB, the group will combine documents in a collection considering specific fields, whereas the $addToSet operator will gather unique values into an array. So, we can use it together to enable grouping operations while preventing duplicate values from being added to the resulting arrays. ...
In this tutorial, we will see how this technique helps retain the benefits of chunking without impacting generation quality. Specifically, we will cover the following: What is parent document retrieval and when should you use it? How parent document retrieval works in MongoDB Implementing parent ...
Indexing in Python MongoDB The number of documents and collections in a real-world database always keeps increasing. It can take a very long time to search for specific documents — for example, documents that have “all-purpose flour” among their ingredients — in a very large collection. ...
MongoDB is used for high-volume data storage, helping organizations store large amounts of data while still performing rapidly. Organizations also use MongoDB for its ad-hoc queries, indexing,load balancing, aggregation, server-side JavaScript execution and other features. ...
If you’re performing frequent “starts with” queries, consider indexing the field you’re querying on. This can significantly improve the performance of these operations. MongoDB Starts With Query Using Regular Expressions Regular expressions, often abbreviated as regex, are sequences of characters ...
How a replica set in MongoDB works,ApsaraDB for MongoDB:A replica set in ApsaraDB for MongoDB is a group of mongod processes and contains a primary node and multiple secondary nodes. MongoDB drivers write data to the primary node only. Then, data is sync