MongoDB 데이터베이스의 첫 버전은 2009년 8월에 출시되었습니다. 1.0 릴리스와 그 직후의 릴리스에서는 JSON 유사 문서 데이터 모델을 기반으로 구축되었으며 탄력적이고 분산된 시스...
来看一下新版本发布了哪些新功能和特性~官方选择从4.4直接跳到5.0可能也是为了表达出该版本变化比较大(调整了发布节奏)的含义。 mongodb version history.png 从上图加粗的几点特性来看,主要功能包括: Time-Series collections原生时序表支持 Clustered indexes聚簇索引 Window functions窗口函数 New temporal operators新...
> help keys Tab completion and command history is available at the command prompt. Some emacs keystrokes are available too: Ctrl-A start of line Ctrl-E end of line Ctrl-K del to end of line Multi-line commands You can enter a multi line javascript expression. If parens, braces, etc. ...
【现象】:节点recovery流程中WT引擎里对于history store的时序判断问题,会触发WT断言错误,mongod异常宕机。 MongoDB 4.2 ~ 4.4 SERVER-51041 高 【触发条件】:实例开启了读写分离,从节点高负载。 【现象】:pthread互斥锁的争用导致从节点的read tickets耗尽,业务查询受损。 MongoDB 4.2 ~ 4.4 SERVER-52556 SE...
{"Version":"1","Statement": [ {"Effect":"<Effect>","Action":"<Action>","Resource":"<Resource>","Condition": {"<Condition_operator>": {"<Condition_key>": ["<Condition_value>"] } } } ] } 各字段含义如下: Effect:权限策略效果。取值:Allow(允许)、Deny(拒绝)。
Change history can be found inHISTORY.md. Compatibility The driver currently supports 4.0+ servers. For exhaustive server and runtime version compatibility matrices, please refer to the following links: MongoDB NodeJS Component Support Matrix
const result = await ctx.model.Activity.findOne({ statistics_id }, { config: 0, history_config: 0 }); 1. 2. 如果你需要以易读的方式来读取数据,可以使用 pretty() 方法,语法格式如下: >db.col.find().pretty() 1. pretty() 方法以格式化的方式来显示所有文档。
{ "_id" : "authSchema", "currentVersion" : 5 } 1. 2. 3. system.users存储数据库帐号信息 AI检测代码解析 single:PRIMARY> db.system.users.find() { "_id" : "admin.root", "userId" : UUID("642d00b9-5daa-4ff9-881d-248d12f1cea5"), "user" : "root", "db" : "admin", "cr...
变更流允许应用程序访问实时数据更改,从而避免事先手动追踪 oplog 的复杂性和风险。应用程序可使用变更流来订阅针对单个集合、数据库或整个部署的所有数据变更,并立即对它们做出响应。由于变更流采用聚合框架,因此,应用程序还可对特定变更进行过滤,或是随意转换通知。 从MongoDB 5.1 开始,我们对变更流进行了优化,提高了...
History API Category Making API Requests Backup APIs Introduction Instance APIs Account APIs Task APIs Other APIs Data Types Error Codes Download PDF Instance Connection Shell Connection Sample PHP Connection Sample Node.js Connection Sample Java Connection Sample ...