MongoDB

MongoDB The database defaults to no user name and password, that is, no access restrictions. To facilitate database management and security, database users need to be created. User-created syntax format {user: " " , pwd : " " ,customdata: {

MongoDB Windows Cluster ConfigurationFirst, the experimental environment:Win7 (X64), MongoDB 3.0.3Two or one sets of Win7 computers, the configuration scheme is as follows:1.3 Shard sharding2. Each shard consists of 3 nodes consisting of 1 Master 2

MongoDB Cluster Build-replica setConceptual knowledge, you can refer to my blog address:Http://www.cnblogs.com/zlp520/p/8088169.htmlI. Replica SET scheme (replica set or replica set):1. There are two ways to build a replica set:One: On a server,

MongoDB uses the update () and Save () methods to update the documents in the collectionParameter description: Query: The search condition for update, similar to where in SQL update query. Update: Update object and some updated

See how MongoDB is usedVersion is 3.6.0The options option refers to the user name and passwordAddress database addresses database format is IP: Port/Database 192.168.0.5:999/fooLink local database test execution MONGO 127.0.0.1:12345/testIndicates a

1. Create a DataSet:A. Creating a default dataset that does not set parameters (default dataset comes with a pipelining id,_id)// Create a default collectionB. Creating a dataset with the specified parametersfalse true, size:6142800, max:10000}) /

MongoDB is a nosql type of database, high-performance, easy to deploy, easy to use features in the IT industry is very popular. The following describes the installation of MongoDB, here we are installed under Linux, using the centos6.4 64-bit, you

Introduced:MongoDB is a database based on distributed file storage. High-performance, open-source, modeless, document-based databases that provide scalable, high-performance data storage for Web applications are among the hottest in the current

A brief introduction to Wiredtiger Engine tuning technology22 Engine Contrast ConceptsStarting with 3.2.x, Wiredtiger becomes the default storage engine. The most popular storage engine in MongoDB today, Wiredtiger has the following advantages over

3.2.4.9 Regular operationsIf you want to implement a fuzzy query, you must use a regular expression, and the language used by the regular expression is the form of a Perl-compatible regular expression.If you want to implement regular use, define the

Reference: http://blog.csdn.net/adparking/article/details/38727911MongoDB's application in the online search, very little about the traditional application of information on how to use MongoDB database content, more or to introduce the log

There are many ways to install MongoDB, you can install the source code, and you can use the Yum source installation method in CentOS.1. Preparatory workRun the Yum command to view the MongoDB package information (normal is no information prompted,

ObjectiveSystem environment is centos,linux only 64-bit version supportedYum Source InstallationRPM Package DescriptionMongodb-org-server contains mongod process, associated configuration, init scriptMongodb-org-mongos contains MONGOs agent process (

Win10 under MongoDB InstallationMongoDB is a product between a relational database and a non-relational database, and is the most versatile and most like relational database in a non-relational database.MongoDB Platforms:

User management:Add Users and give permissionsDb.createuser ({User: "Hy", pwd: "123", Roles:[{role: "Useradmin", DB: "Test"}]})The 3.4 version of the MongoDB configuration file /etc/mongod.conf is, in the format Yaml. Click to view official

Super AdminFor more secure access to MongoDB, visitors are required to provide a user name and password, so users need to be created in MongoDBUsing the role-user-database security management method Common system roles are as follows:Root:

Several ways to retrieve data using MongoDB in C #To retrieve an object:[Bsonignoreextraelements] Public classUsermongomodel {/// /// /// Public LongUserID {Set; Get; } Public stringUserName {Get; Set;

# # #简单操作过程Basic query:To construct the query data:Db.test.insert ({name: "Stephen", Age:35,genda: "Male", email: "[email protected]"})Db.test.insert ({name: "Stephen", Age:35,genda: "Male", email: "[email protected]"})Db.test.insert ({name:

MongoDB additions and deletions to search:Note: the "_id" field is the GUID that the database gives us by default, to ensure the uniqueness of the data1. Add insert1. Syntax: DB. Insert ({"Key1": value1, "Key2": value2,..... "KeyN": Valuen})> Db.wqq.

One, Mongodb projectionProjection means that you select only the data for the field you want, rather than selecting the data for the entire document field. (That is, return the specified field)The second parameter of the Find method is the Set field