In MongoDB Global User Conference held in June, MongoDB official declared the MongoDB Server 4.2, after more than 100,000 test runs instance, MongoDB 4.2 strong. Version 4.2 is now officially launched and are ready for deployment in production environments.
"MongoDB 4.2 withstood the test of more than 100,000 running instances, strong performance."
——Eliot Horowitz,MongoDB CTO & Co-Founder
MongoDB 4.2's main highlights
Distributed Transaction
Extends the MongoDB [atomicity (Atomicity), consistency (Consistency), isolation (Isolation), persistent (Durability)] support for multiple document support capabilities ACID, copied to a shared set from a cluster, enabling customers to more a wide range of application scenarios. [Eliot played by watching MongoDB OpenWorld keynote speech demo , you can know how things work in a distributed transaction. ]
On-demand materialized views
Use a new $ merge operator. Output buffers of large polymerization operation mode is set in a general use, and the new $ Merge operator can efficiently help you update these results, replacing all of these results recalculated old model. [Read this blog post can have a preliminary understanding of the function. ]
Wildcard Indexing
The highly heterogeneous collections (eg, catalog) modeling work has become simple and natural, at the same time, will not cause significant damage to the index support. You can simply define a filter that will automatically match all the fields in the collection, documentation, and an array of sub-index. [Watch demo video to learn more. ]
More powerful MongoDB query language
As more expressive update command, a new mathematical operators and extended regular expressions. Update, reference may be found and modified commands existing field, and the function of absorbing the polymerizable conduit, thereby abundantly expressed. [Read this blog , some examples of which teach you how to write achieve a more powerful query by using fewer lines of code improvements. ]
Retry-write function
The processing cluster fault codes flash preparation is simplified.
As part of MongoDB 4.2, the client's field-level encryption (FLE) function has released Beta version, this feature allows you to selectively protect documents in sensitive fields, each field are encrypted with their own keys, and in the client seamlessly decrypted. Now, for the field-level encryption (FLE) driver features support functions in the testing phase, which can now be evaluated for field-level encryption (FLE) function, but can not be used in production environments.
MongoDB is a common database for a variety of modern application design, which combines document model, intelligent distributed systems in one, and can run freely in any place, can support a laptop, as well as a host of public and private cloud environments. How can I try MongoDB 4.2 version of it?
The most efficient and convenient way to deploy a cluster on MongoDB Atlas. Currently in AWS (Amazon Web Services), more than 60 areas on the (Google cloud service) Azure and GCP can be accessed MongoDB Atlas. On the website you can get a free trial worth $ 200, the code is MONGODB4.2, valid until the end of 2019.
Alternatively, you can also download version 4.2 and run on their own infrastructure. Use MongoDB Enterprise Kubernetes Operator, deploy and manage MongoDB by Kubernetes, can be found in local and cloud.
For more information on MongoDB 4.2, please refer to the following resources:
-
MongoDB 4.2 New Features Guide - covers all of the key improvements items
-
Please pay attention to October 27 MongoDB 4.2 features a new online seminar and other seminars
-
Watch MongoDB MongoDB made in the World Congress keynote CTO 4.2
At the same time, we are preparing the next generation of publishing work MongoDB master server, and strive to build the best data platform for a variety of modern applications.
Reprinted from: http: //www.mongoing.com/archives/28037