PoplarYang · April 19, 2019 13:31
diff --git a/change_priority.js b/change_priority.js
 cfg = rs.conf()
 cfg.members[0].priority = 0.5
 rs.reconfig(cfg)
diff --git a/cmd.js b/cmd.js
 # 1 删除
 删除指定记录
 db.collection.remove({})
 删除collection
 db.collection.drop()
 删除整个库
 先use，db.dropDatabase()

 # 2 通过用户密码登录
 mongo -uusername -ppasswd --authenticationDatabase db

 # update
 db.col.update(
 	{
    	'title':'MongoDB 教程'
    },
    {
    	$set:{
            'title':'MongoDB'
        }
    }
 )

 # 正则
 db.products.find( { sku: { $regex: /789$/ } } )
 db.oplog.rs.find({"o2._id": /2018-12-12.png/})
diff --git a/mongo.js b/mongo.js
 rs1:PRIMARY> use admin
 switched to db admin
 rs1:PRIMARY> db.runCommand({logRotate:1});
 { "ok" : 1 }
diff --git a/remove.js b/remove.js
 db.products.remove(
    { qty: { $gt: 20 } },
    { writeConcern: { w: "majority", wtimeout: 5000 } }
 )
	# 1 删除
	删除指定记录
	db.collection.remove({})
	删除collection
	db.collection.drop()
	删除整个库
	先use，db.dropDatabase()

	# 2 通过用户密码登录
	mongo -uusername -ppasswd --authenticationDatabase db

	# update
	db.col.update(
	{
	'title':'MongoDB 教程'
	},
	{
	$set:{
	'title':'MongoDB'
	}
	}
	)

	# 正则
	db.products.find( { sku: { $regex: /789$/ } } )
	db.oplog.rs.find({"o2._id": /2018-12-12.png/})
	rs1:PRIMARY> use admin
	switched to db admin
	rs1:PRIMARY> db.runCommand({logRotate:1});
	{ "ok" : 1 }