MongoDB

Inserting more than one test data> for (i=1;i... db.blog.insert ({"title": I, "content": "MongoDB Test article. "," name ":" Liu "+i});... }Db.blog.list.find (). Limit ((). ForEach (function (data) {print ("title:" +data.title);}) Cyclic foreach

Recently in the deployment of the company server Nginx + MongoDB + GRIDFS environment;Search n Many documents, basically all the same, during the period encountered a lot of problems;Here is a list of the building documents: Abstract Nginx-gridfs is

The author uses the. NET driver recommended by MongoDB website:http://mongodb.github.io/mongo-csharp-driver/2.0/getting_started/quick_tour/For MongoDB installation readers can refer to other blogs, for basic learning does not require excessive

1. Index:Indexing is time-consuming and laborious, and requires a lot of resource consumption. Use the {"Bakckground": true} option to make the process complete in the background while processing the request normally. If you do not include

Back to CatalogI have to say that the MONGODB official drive in conjunction with. NET is not very good, not very ideal, so I decided to two times the package, it is very inevitable that everyone wants to use simple objects, but to use complex,

Back to CatalogAfter the encapsulation of MongoDB, for the update object in the collection of the properties of a phenomenon, people feel very disgusting, it is a beautiful array before updating, but after updating the collection object into a

This blog post mainly studies data update operations for document in MongoDB. Includes the data "Insert", "Update" and "delete".Document Data InsertionThe command to insert a piece of data into the document file is "db. Collection name. Insert

Using mongodb;using docksample.db;using mongodb.driver;using system;using system.collections.generic;using System.componentmodel;using system.data;using system.drawing;using system.io;using System.Linq;using System.Text; Using

An arbiter (arbiter) is a MongoDB instance in a replication set that does not hold data. The quorum node uses minimal resources and does not require hardware devices, cannot deploy arbiter in one dataset node, can be deployed on other application

1, first install MongoDB, see previous blog post2, execute the following command on the master nodeMongod--dbpath=/var/lib/mongo--master--oplogsize 27017--portYou see the following message that started successfully2015-05-18t09:51:12.111+0800 I

Connect to MongoDB and create a new userUse Malldb.createuser ({User: "haha", pwd: "123456", roles: [{role: "ReadWrite", DB: "Mall" },                ]   }Add the--auth parameter when startingCan be logged in with the-u-p parameter MONGO [library

As the last article in the series, we have to say that C # drives the operation of MongoDB, there are two types of drivers: official drive and Samus Drive, but I personally prefer the latter.Because it provides rich LINQ operations, it's quite handy.

To install the memcached and MongoDB service on the new machine, tossing the day and finally running the two services under Windows.memcached main reference http://www.rootop.org/pages/2768.html or similar basic can be done.If you want to start

"Unable to upgrade database... because SQLServer of this version does not support non-release version of this database (539)" Solution When you use SQL2012 to append a database, the following error is reported: "You cannot upgrade the database...

Mariadb-galera-10.0.19oncentos6.5 **************************************** ************************************* 0. use Cases ************************************** **************************************** database software:

No downtime xtrabackup creating slave nodesMaster: 10.1.1.17: 3306 slave: 10.1.1.18: 3307slave node configure the Basic Environment: Create a mysql user, install the same version of mysql software, xtrabackup software package, and create a directory,

Mongod. conf Mongod-f 'config path' MongoDB introduces a configuration file in YAML-based format. Versions earlier than 2.4 are still compatible. My mongodb configuration file: systemLog: destination: file path: "/var/log/mongo/mongod. log "quiet:

Use excel for data mining (1)Use excel for data mining (1) After configuring the environment, you can use excel for data mining. For environment configuration problems, see: Http://blog.csdn.net/xinxing__8185/article/details/46445435 Example

Data cleansing Note: multiple users call the same function Background] During data extraction, when multiple users access different tables on the source end and need to use the same function, they need to create a new one under multiple users.  

MongoDB BASICS (8) replication II-deployment of arbitration nodes Arbiter is a mongodb instance in the replica set and does not store data. The arbitration node uses the smallest resource and does not require hardware devices. It cannot deploy