MongoDB

MongoDB Learning to organize the access control 1, restricting access to specific IP addresses, only need to add the--BIND_IP parameter when starting up, the client connection should also be added--host 

There is an important concept in the replica set in MongoDB: mostBecause the replica set has only one node that is readable and writable, the other nodes are readable only, and the selection of the master node is determined by the majority, and can

Use Db.system.js.insert ({_id: "AAA", Value: "Zzq"}); This command adds a global key-value pair to the global system JS with a _id of "AAA", Value "Zzq", and then uses it in the next turn.Db.eval ("AAA"); The command shell can return zzq to me, and

MongoDB's shell operation data, used to create, read, update, delete operations.1. CreateThe Insert function is used to create a document inside the collection.example, create a local variable post, which is a JavaScript object representing the

We know that MySQL will need us to set a database default username and password when installing,MongoDB is no exception, but MongoDB is the default does not set access restrictions, You do not need to enter a user name and password to access, but

WebsiteHttp://log4mongo.org/display/PUB/Log4mongo+for+JavaSave host information, methods, etc.http://my.oschina.net/chinaearl/blog/111552Save output information onlyHttp://www.myexception.cn/program/650442.htmlConfigurationLog4j.rootlogger=info,

The following is the original website address:http://docs.mongodb.org/manual/tutorial/create-an-auto-incrementing-field/ProfileThe _id field of MongoDB exists as a primary key at the top level of all documents, and _id must be unique and always have

Create an index You can specify options, and indexes that are built with different options behave differently.First, unique indexA unique index ensures that each document has a unique value for the specified key. For example, to determine that the

MONGO installation processMONGO installation method There are tens of thousands of kinds, only one let me feel good, said the installation process of a little heart de.Method One: Source installation, do not use this method, Nick I used the virtual

Reference: http://docs.mongodb.org/manual/tutorial/generate-key-file/Generate a Key FileOverviewThis section describes the generate a key file to store authentication information. After generating a key file, specify the key file using the-keyfile

MongoDB Introduction and Installation Reference http://www.cnblogs.com/lipan/archive/2011/03/08/1966463.htmlInstallation process: First step: Download the installation package: Official ← Click here, if the win system, note whether the 64-bit

Test environmentFour test server 10.151.151.150:27017 (Master node), 10.151.151.151:27017 (from node), 10.151.151.152:27018 (from node), 10.151.151.152:27017 (quorum node), 10.151.15 1.143:30000 (MONGOs), 10.151.151.143:10000 (Configserver)1. First

1 Packagecom.voice.db;2 3 ImportCom.mongodb.DB;4 Importcom.mongodb.DBCollection;5 ImportCom.mongodb.Mongo;6 Importcom.mongodb.MongoClient;7 Importcom.mongodb.MongoClientOptions;8 Importcom.mongodb.ReadPreference;9

Continue the learning of MongoDB1. Export data (interrupts other operations)Export the Books collection from the database testoperate under the terminalmongoexport-d test-c Books-o/home/hadoop/desktop/books.json2. Import data (interrupt other

Today I learned the basic operation of the shell, as follows:1. Create a database FoobarUse Foobar2. Add a collection to the specified database and add a recordDb.person.insert ({"Name": "ABC"})3. View all the DatabasesShow DBS4. Querying all

MongoDB is an open-source NoSQL database that is used primarily for data-heavy occasions and as a golden partner of node. JS, because it uses binary JSON format, so it has an affinity with JavaScript that no language can match. The specific

Up to now, have seen MongoDB Books Three, today by the United States Kristina chodorow "mongodb authoritative guide" time, There is still a lot of knowledge to be missed; now make a supplement;First, delete the speedDeleting a document is usually

In the use of MongoDB, in order to ensure the security of data, it is necessary to consider data backup and failure recovery, and for performance reasons, the ability to read and write separation will certainly improve database performance.So,

1. First download the PHP mongodb extensionDownload the MongoDB extension source package from the Http://pecl.php.net/package/mongo URL1 wget http://pecl.php.net/get/mongo-1.4.5.tgz2. Unzip the installation package1 Tar zxf mongo-1.4.5.tgz3. Go

A go to directory unzip the downloaded compressed package[Email protected] server$ TAR-ZXVF mongodb.tgzTwo post-installation view:[[Email protected] mongodb-linux-x86_64-2.4.6]$ CD bin[[email protected] bin]$ lsBsondump mongodump mongoimport