import com.mongodb.WriteResult; public class MongoDBExample { public static void main(String[] args) throws UnknownHostException { User user = createUser(); DBObject doc = createDBObject(user); MongoClient mongo = new MongoClient("localhost", 27017); DB db = mongo.getDB("journaldev"); DB...
In a balanced cluster, MongoDB directs reads and writes for a zone only to those shards inside that zone. See the Zones manual page for more information. zstd A data compression library that provides higher compression rates and lower CPU usage when compared to zlib....
For example, a MongoDB deployment might store Personally Identifiable Information (PII) in one or more collections. The mongos logs events such as those related to CRUD operations, sharding metadata, etc. It is possible that the mongos may expose PII as a part of these logging operations. A...
CRUD操作 - 8.1. 插入Documents - 8.1.1. 插入单个Document - 8.1.2. 插入多个Documents - 8.2. 查询Documents - 8.2.1. 查询所有 - 8.2.2. =条件查询 - 8.2.3. in条件查询 - 8.2.4. 逻辑操作查询 - 8.3. 更新Documents - 8.3.1. 更新结构 - 8.3.2. 更新单个Document - 8.3.3. 更新多个...
echo -n “Usage: /etc/init.d/mongodb {start|stop|status}” exit 1 esac exit 0 ###end注册服务: #chmod 755 /etc/rc.d/init.d/ mongodb #chkconfig --add mongodb #chkconfig --list mongodb #chkconfig --del mongodb --不需要了可以删除5.管理 (linux...
name : 'mydb.example.com', ipaddr : '127.66.0.4' } // Logs collection { time : ISODate("2015-09-02T09:10:09.032Z"), message : 'WARNING: CPU usage is critical!', host: ObjectID('AAA') -> references Machine document }
每秒操作数,包含 CRUD 操作 次/秒 target(实例 ID) 时延请求类 Delay10 时延在10 - 50毫秒间请求次数 单位时间内成功请求延迟在10ms - 50ms次数 次 target(实例 ID) Delay50 时延在50 - 100毫秒间请求次数 单位时间内成功请求延迟在50ms - 100ms次数 ...
--url <url> -U <url> connection string url (<url> example: mongodb://127.0.0.1:27017) --admin -a enable authentication as admin --port <port> -p <port> listen on specified port (default <port> is 8081) --help -h display help for command options Usage (Express 4 middleware) To...
MongoDB provides a rich set of query operators for performing CRUD (Create, Read, Update, Delete) operations on documents. The query language is designed to be expressive and flexible. It supports the creation of indexes on fields within a collection to improve query performance. ...
MongoDB 如何优化MongoDB性能? MongoDB据说性能不错,但是我的试验确证实在一亿行的数据情况下他和mysql的性能很接近,略有优势,但是没多大优势。 具体测试情况: 在mongo…显示全部 关注者89 被浏览93,402 关注问题写回答 邀请回答 好问题 1 1 条评论 分享 ...