boolbo的博客

# mongoMongoDB shell version: 3.0.2connecting to: testServer has startup warnings: 2015-05-09T12:34:19.688-0700 I CONTROL  [initandlisten] 2015-05-09T12:34:19.688-0700 I CONTROL  [initandlis

1.createuser# mongodb.createUser(...   {...     user: "user",...     pwd: "pwd",...     roles: [ { role: "__system", db: "admin" } ]...   }... )2.# vi /etc/mongd.confnet:  po

MongoDB 2.2's new $elemMatch projection operator provides another way to alter the returned document to contain only the first matched shapes element:db.test.find( {"shapes.color": "red"},

1、创建Mongodb数据库备份目录mkdir -p /home/backup/mongod_bak/mongod_bak_nowmkdir -p /home/backup/mongod_bak/mongod_bak_list2、新建Mongodb数据库备份脚本vi /home/crontab/mongod_bak.sh #新建文件，输入以下代码#!/bin

$collection->insert($loc);函数原型是insert(&$parameter);所以insert后$loc['_id']!=null如果要循环输入则每次需要$loc = array();否则出现duplicate key错误

1. pecl intall mongo如果报错 yum install cyrus-sasl-devel2.You should add "extension=mongo.so" to php.ini

mongo warning:2016-09-05T10:55:13.241+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.2016-09-05T10:55:13.241+0800 I CONTROL  [initandlisten] **

https://docs.mongodb.com/master/tutorial/install-mongodb-on-red-hat/

4>启动服务./mongodb/bin/mongod -dbpath=/data/mongodb/db -logpath=/data/mongodb/logmongodb 是mongo解压后的目录，下同6>把mongod 作为服务开机启动先在/etc/rc.d/init.d下用vi 新建文件 mongod内容如下：#!/bin/bash##c

1 。添加一个字段.  url 代表表名 , 添加字段 content。 字符串类型。db.url.update({}, {$set: {content:""}}, {multi: 1})。2  删除一个字段db.url.update({},{$unset:{'content':''}},false, true)