mongo database

Use userDbShow DBSDb.dropdatabase ()Db. Collection_name.insert (document)Exp:Db.user.insert ({name: "user1", Password: "123456"})Hint: Writeresult ({"ninserted": 1}) indicates successful insertionDb.user.find ()Hint {"_id": ObjectId ("56946FBA3A18F4867AECBCD1"), "name": "user1", "Password": "123456 "}> test={name: "user2", Passsword: "123456"}{"Name": "User2", "Passsword": "123456"}> Db.user.insert (Test)Writeresult ({"ninserted": 1})> Db.user.find (){"_id": ObjectId ("56946FBA3A18F4867AECBCD1")

Tags: test jsb default TAC cannot fonts size art throughThrough the Rs.status () command we can query to each node to run normally.First, the data synchronization testInsert on port 28011, 28012:Because secondary is not allowed to read and write, in the application of more than read, the use of replica sets to achieve read and write separation. By specifying Slaveok at the time of connection, or by specifying the secondary in the main library, the pressure of reading is shared by the primary and

In our previous blog, we focused on how to build a MongoDB replica set under the Windows platform. Detailed Blog Address:As space is limited in the previous article did not verify the results, in this blog we mainly test:Through the Rs.status () command we can query to each node to run normally.First, the data synchronization testInsert on port 28011, 28012:View reason: Find the answer onlineFirst of all this is normal, because secondary is not allowed to read and write, in the application of wr

starting data synchronization. If the property is modified, use Rs.reconfig (); 3.3 The deployment policy replica set contains a maximum of 12 nodes, and the minimum replica collection configuration that provides automatic failover is in the previous example. Consists of two replicas and one quorum node. In a production environment, the arbiter node can run on the application server, while the replica runs on its own machine. For most environments, this configuration of the economy and univers

Package COM.TOMPIG.LJC; Import java.net.UnknownHostException; Import java.util.ArrayList; Import Java.util.Date; Import java.util.List; Import Java.util.Set; Import Com.mongodb.BasicDBObject; Import Com.mongodb.DB; Import com.mongodb.DBCollection; Import Com.mongodb.DBCursor; Import Com.mongodb.DBObject; Import Com.mongodb.Mongo; Import com.mongodb.MongoException; public class Dbutil {String collectionsname = "User_info"; String dbname = "LJC"; Dbcollection coll = null;

"-- Logappendmongod.exe --replset rs1--keyfile "D:\Program files\mongodb\data\replica\key\r1"--port 28011--dbpath " D:\Program files\mongodb\data\replica\data\r1 "--logpath" D:\Program files\mongodb\data\replica\log\r1.log "-- logappendcd/d D:\Program files\mongodb\binmongod.exe --replset rs1--keyfile "D:\Program files\mongodb\data\ Replica\key\r2 "--port 28012--dbpath" D:\Program files\mongodb\data\replica\data\r2 "--logpath" D:\Program Files\ Mongodb\data\replica\log\r2.log "--logappendThir

rs1--keyfile "D:\Program files\mongodb\data\replica\key\r1"--port 28011-- DBPath "D:\Program files\mongodb\data\replica\data\r1"--logpath "D:\Program files\mongodb\data\replica\log\r1.log" --logappend cd/d D:\Program files\mongodb\bin mongod.exe --replset rs1--keyfile "D:\Program files\ Mongodb\data\replica\key\r2 "--port 28012--dbpath" D:\Program files\mongodb\data\replica\data\r2 "--logpath" D:\ Program Files\mongodb\data\replica\log\r2.log "--logappend Third, login client, initialize r

Label:The production environment uses the MONGO database. Long-coveted for the MONGO database, its high performance/open source/modeless/document-based database/... What a tempting feature, also occasionally tossing and playing, but did not make notes, take advantage of this

Tags: mongodb database master-Slave data synchronizationIn the previous series of articles, we described the basic operations of MongoDB, advanced queries, and the use of indexes. This blog mainly describes how the Windows system to create master-slave database synchronization;Need to start two MongoDB document database, one is the main mode boot, the other belon

First, the questionAfter installing the 3.4 mongdb, I randomly downloaded a Mongovue client online, unable to view the default database local collection, and the following issue occurred when creating the collection Error in creating new CollectionObject references are not set to an instance of an object.Type:System.NullReferenceExceptionStack: In MangoUI.ComNavTree.dbAddCollection_Click (Object sender, EventArgs e)After searching on the internet, so

Tags: NTA DDR detail replica set security one record lock AssociationThis series wants to share with you the following chapters (I will continue to update the (^ω^)): 1. One of the MONGO 3.4 Shard Cluster Series: A brief discussion on shard cluster 2, MONGO 3.4 Shard Cluster Series two: Building a shard cluster--Hash shard 3, MONGO 3.4 Shard Cluster Series three:

Tags: ruby operation MongoDBRecent knowledge of MongoDB has involved using Ruby to manipulate the MongoDB database, because the reference data used in Ruby MONGO driver version is not 2.3.3, so in terms of operation will be different, so wrote this Ruby2.3.3 operation MongoDB get started, learning method is reference URL https://docs.mongodb.com/ruby-driver/v2.3/quick-start/Fast learning is mainly divided i

Package entity;Import Java.util.Date;Import com.mongodb.BasicDBList;Import Com.mongodb.DBObject;public class Commoneditentity {Query record results in/** database */Private DBObject record;/** database Default ID */Private String _id;/** Project ID */Private String project_id;/** Project Name */Private String project_name;/** Project Creation Time */Private Date start_time;/** next Project Activation time *

because it is not currently master.Helpless, can only find another way, because the MONGO data is not too familiar.Later read the article on the Internet: https://segmentfault.com/q/1010000000532867 is also about this problem.Probably think of the solution: Turn off this MONGO service, remove the local configuration directory from this instance, restart it, and then configure it with the Rs.initiate (CFG)

Tags: style color os io file data CTI LineStart by generating a text file that can be either JSON or CSV, one per line of data, well organized, and can be generated in a generic text editor or from office. Then execute the following import command: /usr/local/mongodb/bin/mongoimport-d cms-c cms_tags_20120727–type csv–file/tmp/tag0810.csv-h localhost-port 111 11–upsert-f name Parameter description: -D database name -C Collection Name –type file type, C

Tags: Need statistics Mon Select passwd count () style images classPython connection MONGO database is mainly used Pymongo connection, the general situation is divided into two kinds of connection, one through the specified port and address directly connected, and another through the format of the URI connection 1. Connect MONGO by specifying port and address con

Tags: app docker node database master-slave read config Isod how to PrimaryFirst, the specific operation method1. Start two MONGO containersDocker run--name mongo1-p 21117:27017-d MONGO--noprealloc--smallfiles--replset rs1docker run--name mongo2-p 22117: 27017-d MONGO--noprealloc--smallfiles--replset rs12. Viewing a ru

The first step is to find the MongoDB installation directoryStep two, go to the bin directory in the MongoDB installation directory from the command lineAttached: http://www.runoob.com/mongodb/mongodb-create-database.html MongoDB operation DaquanStep three (1), Export the Data command (the exported file has two formats: Json/csv, the JSON file is exported here, for exporting the CSV file you need to specify a variable-field ' for the Field name '):Mongoexport-h the host address of the

Tags: io os using ar file data sp CTI onTry to use the MONGO model in thinkphp today and find out that there will always be an errorCall to a member function selectcollection () on a non-objectFor a reason, it was found that the configuration file was not imported, resulting in the inability to connect to the database and instantiate the model. Look at the configuration file, and there are no errors, the co

Tags: index path pre shel Pymongo install database strong aptInstall the MONGO database and enter it under the shell sudo apt-get install MongoDB If you need to use the MONGO database in Python , you will also need to install the Python wrapper library Pip Install Pymongo