MongoDB

Continue the learning of MongoDB--Detailed index--Index management--Spatial Index1. Create a simple index(1) Prepare 200,000 data firstfor (var i = 0;iDb.books.insert ("number": I, "name": i+ "book")}(2) Check the query performancevar start = new

when setting up a MongoDB replica set, the primary node, the second node, the quorum node, and possibly the resource configuration (CPU or memory) are unbalanced, so it is required that some nodes cannot be primaryWe know the settings of MongoDB:In

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

MongoDB is a very common document-oriented non-relational database, mainly used in micro-blogging, blog, IM and other message storage business, because the data stored in the financial industry and other industries are not so important, and there is

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,

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

MongoDB Basic UseAfter 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:Show DBS: Display Database listShow Collections:

Turn from: http://www.cnblogs.com/huangxincheng/archive/2012/02/18/2356595.html (slightly modified)1. Download MongoDB: Http://www.mongodb.org/downloads;(Mine is mongodb-win32-x86_64-2008plus-2.6.3)2. Unzip the downloaded

Objective:This weekend but learned a day, a little do not want to study, just finished the first two post, probably after one hours, I said in my heart, if just wrote that two blog reading over 80 I have this blog, if but, tonight will no longer

http://blog.chinaunix.net/space.php?uid=22270773&do=blog&id=19935171. If there is no special use, Suggest: Table name, field name all in lowercase letters. 2. To shorten the length of the field name as much as possible, consider creating a key and

package Mongo;import Java.net.unknownhostexception;import Com.mongodb.basicdbobject;import Com.mongodb.db;import Com.mongodb.dbcollection;import com.mongodb.DBCursor; Import Com.mongodb.mongo;import Com.mongodb.mongoexception;public class Connection

One, about using MongoDB on WindowsMongodb Official documentation-Installing MONGODB under Windows Note: MongoDB does not support Windows XP systems It is also easy to install MongoDB on Windows, click on the link above to download

Enumerate traversal pointers Overviewas already mentioned, Db.collection.find () If you do not assign a variable to a VAR declaration, the first 20 records are automatically enumerated. manually Enumerate pointersIn the MONGO console, assign the

Dbstats commandThe Dbstats command can return storage information for a specified database, by default displaying storage information in bytes, and you can add a scale parameter, such as scale:1024 for kilobytes display. The time to return

MongoDB installation ConfigurationInstallationMongoDB's website for MongoDB. When downloading, you can choose either to install the package or to compress the package.When the download is complete, double-click the installation package and install

Step1:Download Https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.11.tgz The latest version, this is the linux64 bit, you can also go to the homepage own choiceStep2:Unzip the tar vxf mongodb-linux-x86_64-2.4.11.tgz, and after extracting it,

Recently due to work needs, to begin to contact with MongoDB, so began to study MongoDB, the first step of research, naturally from the installation and use began. There will certainly be more research and study, so prepare to make a series of

Mongo DB is a non-relational database (NOSQL) that is currently very popular in the IT industry, and its flexible data storage methods are favored by current it practitioners. Mongo db is a good way to implement object-oriented thinking, in Mongo db,

First, MongoDB IntroductionTraditionally, a relational database management system (RDBMS) is used to manipulate databases through the standard language of SQL. In contrast, NoSQL databases do not use the SQL language. As a result, sometimes people

Building MongoDB Shardshttp://gong1208.iteye.com/blog/1622078Sharding Shard ConceptIt is a kind of database cluster system that expands the massive data horizontally, the data table is stored on each node of sharding, and the user can easily