字段映射ID字段MongoDB 数据集中存放的数据，称之为文档（Document）。每个文档在存放时，都需要有一个ID，而这个 ID 的名称，固定叫 _id，类型是 MongoDB.Bson.ObjectId。当建立映射时，如果给出 _id 字段，则 MongoDB 会采用这个 ID 做为这个文档的 ID ，如果不给出，MongoDB 会自动添加一个 _id 字段。在使用上是完全一样的。 using MongoDB.Bson; using MongoDB.Bson.Serialization.Attributes; namespace Nop.Core {MongoDB在保存时，会将这个 topic_id 转成 _id 保存到数据集中。
2/16/2021 329字 得分： 13.149691; MongoDBmongodb data files in /var/lib/mongodb directory..and the dbpath entry in /etc/mongodb.conf was /var/lib/mongodb..now when i start the mongodb using sudo service mongodb start..mongodb/这个目录的所有者必须是 mongodb，可以使用这个命令修复： sudo chown -R mongodb:mongodb * drwxr-xr-x 4 mongodb mongodb tail -50 /var/log/mongodb/mongodb.log read mongodb log i am getting
11/12/2020 93字 得分： 12.47193; MongoDBarticles/73203 http://www.alexbevi.com/blog/2016/02/10/recovering-a-wiredtiger-collection-from-a-corrupt-mongodb-installationarchives/2214 http://www.alexbevi.com/blog/2016/02/10/recovering-a-wiredtiger-collection-from-a-corrupt-mongodb-installationutm_source=blogxgwz1 https://dba.stackexchange.com/questions/190172/mongodb-wiredtiger-error-collection-wt-does-not-appear-to-be-a-wiredtiger-fil https://stackoverflow.com/questions/2404742/how-to-install-mongodb-on-windows
10/28/2018 0字 得分： 12.007492; MongoDBCMS based on MongoDB Currently MongoDB is becoming very popular and more CMS based on this are developedSome of the most used CMS based on MongoDB are : CalipsoCalipso is a fast flexible and simple NodeJSLocomotiveLocomotiveCMS is a simple but powerful CMS based on liquid templates and mongodb database.MongoPressMongoPress is built on top of PHP and MongoDB which is an instantly scalable, incredibly flexibleRubedoRubedo is an open source content management system based on Zend Framework and MongoDB which has
11/3/2015 0字 得分： 11.989573; MongoDBmongoDB有两个接口库：mongo-c-driver和mongo-cxx-driver。前者是c代码接口库，后者是c++代码接口库，是在mongo-c-driver的基础上进行二次封装。1.1、mongo-c-driver：c代码接口库 下载链接：https://github.com/mongodb/mongo-c-driver 最新版本：mongo-c-driver 1.13.01.2、mongo-cxx-driver：c++代码接口库，是在mongo-c-driver的基础上进行二次封装 下载链接：https://github.com/mongodb/mongo-cxx-driver最新版本：MongoDB C++11 Driver 3.4.0 注意：此库需要boost支持 Introduction The MongoDB C++ Driver is the officialdoc https://docs.mongodb.com/drivers/cxx/ Source Code https://github.com/mongodb/mongo-cxx-driver
1/3/2021 81字 得分： 11.934088; c++ MongoDB一、系统环境 os：阿里云ubuntu18.04 64位 mongodb 4.2 storageEngine：wiredTiger 二、ErrorMessage 1./lib/systemd/system/mongodb.service 文件不存在 Creating Systemd service file https://github.com/droppanel/examples/blob/master/mongodb/ubuntu/install.default.sh 2.[sudo] chown mongodb.mongodb -R /var/lib/mongodb https://stackoverflow.com/questions/51184838/mongodb-can-not-start-by-the-command-service-mongod-start .
11/24/2019 15字 得分： 11.928366; MongoDBMongoDB performance optimization 2:Querying MongoDB with LINQ in a Server-Side..
1/24/2018 0字 得分： 11.778538; MongoDB1.MongoCola国人自己c#写的客户端，可学习如何操作mongodb https://github.com/magicdict/MongoCola 2.mongobooster (using)http://3t.io/mongochef/ 4.RoboMongo 支持3.2 https://robomongo.org/ 5.NoSQL Manager for MongoDBSupports all popular databases: MySQL, PostgreSQL, SQLite, Oracle, DB2, SQL Server, Sybase, Teradata, MongoDBetc. http://dbeaver.jkiss.org/ 7.Robo 3T – is a third party tool which provides a lightweight MongoDB
5/9/2016 44字 得分： 11.720646; MongoDBStep 1 — Installing MongoDB Mongodb Office Install Document: https://docs.mongodb.combefore: MongoDB shell version v3.4.2 connecting to: mongodb://127.0.0.1:27017 MongoDB server versionIP Binding — MongoDB Manual.https://docs.mongodb.com/manual/core/security-mongodb-configurationSave the file, exit the editor, and restart MongoDB: sudo systemctl restart mongodb MongoDB is now[sudo] chown mongodb.mongodb -R /var/lib/mongodb https://stackoverflow.com/questions/51184838
8/17/2019 113字 得分： 11.694753; MongoDB Ubuntu一、释放mongodb进程占用的内存 1.用top命令查看系统占用内存的情况 top -p $(pidof mongod) output: top - 10:52:52 up 5 days20 0 2364068 786760 8804 S 0.3 19.5 76:05.24 mongod 2.强行收回内存办法 对于主要是写入的数据库，mongodb/etc/mongod.conf必须按 YAML参数格式修改配置文件，否则MongoDB启动会失败。 # Where and how to store data./blob/master/templates/mongodb/config/mongod.conf.j2 (3)配置完成后重启MongoDB。8G"}) MongoDB 内存用在哪 https://mongoing.com/archives/8781 参考链接：https://docs.mongodb.com/manual
9/24/2018 244字 得分： 11.655622; MongoDB Ubuntu