Shulou(Shulou.com)05/31 Report--

This article mainly introduces the features of each major revision of MongoDB officially released. The introduction in this article is very detailed and has certain reference value. Interested friends must read it!

Version 1.8.X(officially no longer supported)

Fragmentation--The fragmentation cluster is modified from experimental state to production ready state.

Replicable Set--Replicable Set status is ready for production environment.

Replicable set pairs deprecated-Replicable set pairs are no longer supported by MongoDB Corporation

GEO search--introducing a two-digit GEO index (coordinate system, 2D index)

Version 2.0.X(officially no longer supported)

Default deprecation of logging--The new version deprecates logging by default, which is an important feature to prevent data conflicts.

Query-This version adds the $and query operator to refine the $or operation.

Sparse Indexing-Previous MongoDB protected the inode for each document, even if the document portion included fields tracked by the index.

A sparse index adds only document nodes that contain related fields. This feature significantly reduces the size of the index.

In some cases, index performance can also be improved because smaller indexes make more efficient use of memory.

Replicable Set Priority--This version allows you to specify the priority of servers in a replicable set for the purpose of selecting a new primary server.

Collection-level compression and repair-Previous versions could only perform compression and repair on a single database; this time it has been extended to a single collection.

Version 2.2.X(officially no longer supported)

Aggregation Framework-This change makes data analysis and transformation easier and more efficient. In some ways, this tool replaces some of the work of map/reduce;

It is based on management build rather than map/reduce model.

TTL Collections-introduces collections with lifecycles, allowing us to create caching models similar to MemCached.

DB-level locks-This release adds database-level locks instead of global locks, which improves write concurrency by allowing multiple operations to occur simultaneously on different databases.

Label identification fragmentation-This version allows nodes to use IDs to identify the physical location of data stores. Such applications can control where data is stored in the cluster.

This increases efficiency (read-only nodes are deployed in the same data center). Reduce collaborative management issues (only store data needed by a country on servers in that country).

Version 2.4.X(oldest stable version)

Enterprise Edition-The first subscriber version of MongoDB, including additional validation modules. The Kerberos authentication system can be used to manage login data. Free version included

All the other features of the Enterprise Edition.

Aggregation framework performance-Improve the performance of aggregation frameworks to support real-time analytics.

Text Search-An enterprise-level search solution integrated as an experimental feature of MongoDB.

Added GEO geo-location indexing-This release includes support for polygon cross queries and GeoJSON, as well as improvements to spherical models to support ellipsoidal models.

V8 JavaScript engine-MongoDB and MongoDB map/reduce system performance from Spider Monkey JavaScript.

Version 2.6.X(stable version)

$text queries--This version adds the $text operator to support text searches in normal queries.

Aggregation improvements-There are major improvements to aggregation in this release. You can stream data over the cursor or export data to a collection. Among other features and performance improvements,

There are also many new operators and pipeline stages.

Improved wire protocol for writes--large writes will now be acknowledged with finer granularity. Fortunately, batch writes have a success or failure status for each write, making it possible to write

Errors can be returned to the client over the network.

New update operator--$mul has been added to the update operator, which can be multiplied by the value to be updated.

Sharding improvements-Sharding clustering features have been improved to better handle certain situations. Consecutive blocks can be merged, and duplicate data is left to be automatically cleaned up after the block migration is complete.

Security improvements-This release supports access control at the collection level, as well as user role definitions. SSL and X509 certificate support has also been improved.

Query system improvements-Many parts of the query system have been refactored, which improves performance and predictability of queries.

Enterprise Module-MongoDB Enterprise Module improves and extends existing functionality, including audit support.

Version 3.0.X(latest stable version)

MMAPV1 storage engine selection supports collection-level locks.

A replicable set selection can have 50 members.

WiredTiger storage engine supported;WiredTiger is only available in 64-bit versions after MongoDB 3.0.

Wired Tiger 3.0 storage engine provides document-level locking and compression capabilities.

Pluggable Storage Engine API allows third parties to develop MongoDB Storage Engine.

Improved interpretation function.

SCRAM-SHA-1 verification mechanism.

The ensureIndex() function has been replaced by createIndex() and should no longer be used.

The above is all the content of this article,"What are the features of each major revision of MongoDB officially released?" Thank you for reading! Hope to share the content to help everyone, more relevant knowledge, welcome to pay attention to the industry information channel!

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