MongoDB

1. Visit MongoDB official Http://www.mongodb.org/downloads2. Click on the "DOWNLOAD (tgz)" button:3. Unzip the downloaded file archive and cut it to a location in your Mac:4. Configure the environment variables, open the terminal, enter "OPEN-E.

The number of connections in the MongoDB sharding architecture is easy to reach very high, where the number of connections is divided into several concepts: the number of TCP connections netstat can be counted, generally this is the highest. If the

MongoDB Two features master-slave replication and replica set for synchronous backup of dataFirst, master-slave replicationMaster-slave replication is a simple database synchronous backup of the cluster technology . For example, the primary server

1. First download the MongoDB installation package on the official website:Http://www.mongodb.org/downloadsHTML5 Training App Development quote check others SMS Content Android app development credit card goodHere we download the zip format download,

The code is easy to understand, but I've wasted a lot of time in the process, and I've seen a small hole in the Nodejs async. There are many pits in the future, so find the pit pits slowly.The resources are as follows:1. Assertion module:

After the successful start of MongoDB, and then open a command line window input MONGO, you can do some of the database operations. Enter help to see the basic Operations Command, but MongoDB does not have a command to create a database, but there

1, from Yum install Boost, pcre, pcre-devel and other dependent libraries.Execute command yum install boostYum Install PcreYum Install Pcre-devel2, installation SConsUnzip scons tar-zxvf scons-2.1.0.tar.gz CD scons-2.1.0Installing scons python setup.

Need Pymongo LibraryEasy_install PymongoScript:Import Socketimport sysimport Pymongo ipcons = []def Scanner (IP): global ipcons SK = Socket.socket (socket.af_inet, S Ocket. SOCK_STREAM) Sk.settimeout (0.3) Try:sk.connect ((ip,27017)) ipcons.append

We can view all the parameter descriptions of Mongod by Mongod--help, and the following are the Chinese explanations of each parameter.Basic Configuration–quiet# quiet Output–port Arg# Specify the service port number, default ports 27017–BIND_IP Arg#

MONGODB provides pre-compiled binaries for both 32-bit and 64-bit systems, which you can download from MongoDB website, MongoDB precompiled binary package: Http://www.mongodb.org/downloads Note: Windows XP systems are no longer supported

MongoDB as a Windows service startup Windows version Installation MongoDB Official Download Station is http://www.mongodb.org/downloads, can go up to download the latest corresponding version, there are 32-bit, 64-bit. Set the

Common statements:To Create a database: Use database_nameExample: Use MyfisrtmongodbShell tip: Switched to DB MYFISRTMONGODB indicates successHowever, with the show DBS command, you will not be able to see the newly created database, you need to

Special indexes and collections1. Fixed set: The fixed set needs to be created in advance to look good, and its size is fixed. When a fixed collection is full, if you insert a new document again, the pinned collection automatically removes the

A. MongoDB installation1.1 Download the installation packagewget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel55-3.2.0.tgz1.2 Unzip, move to/usr/local/mongodb directoryTAR-ZXVF Mongodb-linux-x86_64-rhel55-3.2.0.tgzsudo MV Mongodb-linux-x8

1) Start MongoDB service after installation.1_1) Establish data/db to ensure that at least 3g of disk size1_2) Create a log folder1_3) configuration fileContent, specifying where the data is stored, the log file

First, insert the documentInsert a document into a collection using the Insert () or save () method>db. Collection_name. Insert (document)Detailed usage can refer to MongoDB Novice TutorialSecond, find the documentFind () Displays all documents in

MongoDB version number is, MongoDB shell version:2.4.4The operating environment, Shell window, is as follows:[mongo_user@mongodb_dbs ~]# mongo --port 301002.4.4127.0.0.1:30000usepospos1, the first statistical grouping records, the Paymentorder field

Execute at the command line:Mongod--logpath D:\MongoDb\logs\MongoDB.log --logappend--dbpath D:\data --directoryperdb-- ServiceName MongoDB--install --auth The Green Word section is the path to database log and database file storage, make sure that

Csdn's Markdown editor is really bad enough, this article is lost againEnable authenticationMongod boot is not enabled by default, you need to specify –auth boot. or set the Security.authorization to "enabled" in the configuration file.Create userdb.

Analyze the main misunderstanding of DB2 database performance Main misunderstandings about DB2 database performance: Logical design should always be fully mapped to Physical Design Actual: the physical design in the DB2 database design should be as