MongoDB 4.2 officially released, MongoDB Server 4.2 to improve the technical level of modern transactional and analytical data platform. The main focus of 4.2 include:
- Distributed Transaction will MongoDB multiple document ACID replica set to expand from a shared cluster, able to offer a wider range of use cases service
- Demand materialized view with a new $ the Merge operator in the collection of large polymeric output buffer is a common model, the new $ the Merge operator to effectively update these results, they are not fully recalculate
- Wildcard indexing makes modeling a collection like this highly heterogeneous catalog of simple and natural, without sacrificing support to the index. Simply define a filter, it will automatically match the index set of all fields and array subdocument
- MongoDB query language enhancements , such as updates and more expressive, new mathematical operators and extended regex support. This version of the update command and findAndModify under existing fields, and added to the polymerization conduit to obtain a stronger expression
- Reducible read , the coding process to reduce a temporary failure of the cluster complex
Client field-level encryption (FLE, Client-side Field Level Encryption) is now part of MongoDB 4.2 can be used in the beta version. FLE use, can be selectively protected document sensitive fields, each uses its own encryption key, and decryption on the client seamlessly.
MongoDB is a modern general-purpose database application, which brings together the document model, intelligent distributed systems and its ability to run anywhere from laptops to mainframes, running in both public and private clouds. If MongoDB 4.2, for example, the fastest and easiest way is to start a cluster on MongoDB Atlas, it can be used in AWS, Azure on more than 60 areas and GCP.
Or 4.2 can download and run on their infrastructure. By MongoDB Enterprise Operator for Kubernetes, you can make Kubernetes deploy and manage MongoDB.
For details, see the release notes: