MongoDB

Description: mongodb[1] is a database based on distributed file storage. Written by the C + + language. Designed to provide scalable, high-performance data storage solutions for Web applications.MongodbMONGODB[2] is a product between a relational

: http://pan.baidu.com/s/1c1rsW1q Password: mjslCourse Outline:MongoDB Basics:1th, NoSQL and MongoDB (the background of NoSQL, the introduction of various NoSQL databases, the features of MongoDB)2nd, MongoDB installation configuration (MongoDB

Experimental construction of a cluster to do practiced hand.Configuration and Environment:Win10 (native) and Linux (CENTOS7) intranet servers each.Mongodb3.07Target: Replica set replica set structure, a primary a slave, to achieve read-write

1. Test ToolsThis test chooses YCSB (Yahoo! Cloud System Benchmark) as the test Client tool. YCSB is a NoSQL test tool for Yahoo Open source, used to test the performance of a variety of NoSQL, project address:

1: InstallationGo to MongoDB's official website http://www.mongodb.org/downloads Download 32bit PackageThe following files will appear after decompressionIn the installation of the disk C: Build the MongoDB directory, copy the bin directory to this

As a real-time monitoring of MongoDB's sharp weapon, Mongostat is definitely a razor, simple and easy to use, however, to carefully analyze the mongostat state, but also a deep understanding of the meaning of each monitoring

MongoDB's cluster approach is divided into three types of replica set/sharding/master-slaver, here only the simplest way to build a cluster (production environment), if there are multiple nodes can be and so on or view official documents.Replica

/*** MongoDB Class * * Examples:* $mongo = new Hmongodb ("127.0.0.1:11223");* $mongo->selectdb ("test_db");* Create an index* $mongo->ensureindex ("test_table", Array ("id" =>1), Array (' unique ' =>true));* Get Records of tables* $mongo->count

Mac under the MongoDB installation there are two main ways, one is manual installation, need to download the source files on the official website, the second is through homebrew, as for homebrew do not introduce. Since it is a Mac system, I think it

First, queryFind methodDb.collection_name.find ();Query all the results:select * from Users;Db.users.find ();Specifies that those columns (keys) are returned:Select name, skills from users;Db.users.find ({}, {' name ': 1, ' Skills ':

Participation in the text Textbook Code Textbook Solutions stating: Http://proserge.kh.ua/coding/index.php/post/33/MongoDB+for+NodeJs+devs+week4%3A+Perfomancenode. js + MONGO DB is a tool used to build [Web + database] project, and the

Two years of time in a total of 6 series, including Zabbix and Nginx has made ebook, the other series of tutorials have been converted into a PDF to the vast number of technical homes to download, thank you for the maintenance of the survival time

Wget http://nodejs.org/dist/v0.8.7/node-v0.8.7.tar.gz (Stable version) Wget http://nodejs.org/dist/v0.10.22/node-v0.10.22.tar.gz (Latest version) 2. DecompressionTAR-XVF node-v0.10.22-linux-x64.tar.gzCD node_xxx 3. Installation Yum Install gcc-c++ (

1. shardingConcept: In MongoDB There is another cluster, that is, sharding technology, can meet the needs of a large number of MONGODB data volume growth.When MongoDB stores massive amounts of data, a machine may not be enough to store data enough

this share is shared by MongoDB Greater China technical consultant. "elderly "Come up and ask MONGO what it means, guess the prize, also claiming to be the most cattle of MongoDB experts (in the Kite surfing circle ...) we all know that). I believe

Part 1W3cschool's MongoDB java:http://www.w3cschool.cc/mongodb/mongodb-java.htmlMongoDB Java Drive use collation: http://blog.163.com/wm_at163/blog/static/132173490201110254257510/MongoDB Java version driver: http://www.aichengxu.com/view/13226Mongo-

#MongoDb Aggregation method group Aggrate mapreduce#1. Group (shard not supported, distributed calculation)*Grammatical StructureDb.collection.group ({key:{category:1},//Classification according to categorycond:{shop_price:{$gt: 20}},//a product

MongoDB official Java driver, save and read, the need is DBObject object, this is an interface, implement Put,get and other methods, similar to map, if we want to directly save ordinary Java objects to MongoDB, You need to convert to dbobject

1. Accessing configuration information

Expdp export encountered ORA-39064: unable to write Log File Expdp export encountered ORA-39064: unable to write Log File .. Exported "USER_XXXX". "TAB_YYYY" 0 KB 0-line ORA-39064: unable to write Log File ORA-29285: file write error After searching