⑤ Body中对应command命令名、库名、表名的解析在mongodb(version<3.6)低版本协议中由class DbMessage {...}类实现 ⑥ Body中对应command命令名、库名、表名的解析在mongodb(version<3.6)低版本协议中由struct OpMsgRequest{...}结构和struct OpMsg {...}类实现 Mongos和mongod实例的服务入口处理流程大同小...
version() current version of the server db.watch() - opens a change stream cursor for a database to report on all changes to its non-system collections. 1.3. db.collection.help() 命令 代码语言:javascript 代码运行次数:0 运行 AI代码解释 > db.demo.help() DBCollection help db.demo.find(...
mongofiles [OPTION] COMMAND [ARG] OPTION可为: 通用选项: --help|-h:查看帮助。 --version:查看版本。 连接选项: --host HOST:主机名。 --port PORT:端口。 身份验证选项: --authenticationDatabase AUTH_DBNAME:身份校验使用的数据库。 --password|-p [PASSWORD]:指定密码。如不指定PASSWORD,则于交互界面...
AI代码解释 db.help()DBmethods:db.addUser(username,password[,readOnly=false])db.auth(username,password)db.cloneDatabase(fromhost)db.commandHelp(name)returns the helpforthe command db.copyDatabase(fromdb,todb,fromhost)db.createCollection(name,{size:...,capped:...,max:...})db.currentOp()dis...
db.runCommand(cmdObj) run a database command. if cmdObj is a string, turns it into {cmdObj: 1} db.serverStatus() db.setLogLevel(level,<component>) db.setProfilingLevel(level,slowms) 0=off 1=slow 2=all db.setWriteConcern(<write concern doc>) - sets the write concern for writes ...
This version of the documentation is archived and no longer supported. View thecurrent documentationto learn how toupgrade your version of MongoCLI. Command Errors Error: missing credentials You might not have properly set up your API keys. Ensure that you added your API keys to yourprofileor ...
db.adminCommand( { <command> } ) 注意 有关特定命令(包括事务语法和示例)的详细信息,请单击该命令的参考页面链接。 命令语法 运行数据库命令时,将该命令指定为 db.runCommand() 的文档。文档的键是要运行的命令,值通常为 1。值不影响命令的输出,例如: db.runCommand( { hello: 1 } ) ...
搭建mongodb集群步骤 mongodb搭建分布式集群,介绍:分片(sharding)是指将数据库拆分,将其分散在不同的机器上的过程。将数据分散到不同的机器上,不需要功能强大的服务器就可以存储更多的数据和处理更大的负载。基本思想就是将集合切成小块,这些块分散到若干片里,每个
readConcern:读隔离(New in version 3.2.): readConcern: { level: <"majority"|"local"|"linearizable"> } readConcern选项可用于以下操作: findcommand aggregatecommand and the db.collection.aggregate() method distinctcommand countcommand parallelCollectionScancommand ...
m - MongoDB Version Manager m helps you download, use, and manage multiple versions of the MongoDB server and command-line tools. This can be useful for development & testing environments. For example, testing release upgrades/downgrades or potential behavior differences between versions. Where po...