MongoDB

Import java.net.UnknownHostException;Import Com.mongodb.BasicDBObject;Import Com.mongodb.DB;Import com.mongodb.DBCollection;Import Com.mongodb.DBObject;Import Com.mongodb.Mongo;/**  *Inserting data into MongoDB with Java * @author WWD*  */public

Information about MongoDB is now less, and most of the English site, most of the above content by the author translated from the official website, please translate or understand the error point please testify. After that I will continue to focus on

First, the index base:MongoDB's index is almost identical to the traditional relational database, which includes some basic optimization techniques. Here is the command to create the index:> Db.test.ensureIndex ({"username": 1})You can see whether

MongoDB InstallationMongoDB with cross-platform excellent features, providing support for the mainstream operating system, we can choose to download the corresponding installation package according to the operating system we use. Figure 1.MongoDB

Recently the project has used MongoDB, recently like MongoDB NoSQL database is also relatively hot, write this down, easy to review and learn from you.The relationship between the data in MongoDB is database,collection,document put into the

The method described here applies only to the CentOS platform and the test version is CentOS 6.5Download source installation is really troublesome, here is a relatively simple way to go to install MongoDB driverBefore installing MGO, you need to

Pymongo is a Python module that may be installed by sudo pip install Pymongo. Import Pymongo Import Pymongo Create a connection conn = Pymongo. Connection ("127.0.0.1", 27017) View all databases

Download: mongodb:http://www.mongodb.org/ I downloaded the msi of WINDOWS32. Installation: Next, you can. New: Create a new Data folder and build the DB and log two subdirectories in data.

Recent projects in the site user data to do new visitors statistics, data stored in MongoDB, the statistics are not really big, 1000W up and down, but the company only allocated to my 4G memory computer, let me program run up breathless ... It's

The default number of connections per connection takes up 10M of memoryUlimit-a View Stack sizeMongoDB server memory to meet connection overhead + data size + index sizeThat is, the number of connections overhead + Hotspot Data + indexProblems with

MongoDB's log growth is fast,/Var space is immediately full, even if you change to another disk partition to save the log, the log is growing fast, the disk to see the chime.A good way to do this is to use a rotational log.MongoDB rotation Log a bit

First, Mongodump/mongorestore WayUsage Scenario: Database Export specified collection, unable to manually modify the export file (binary)Allowable condition: The original collection of the database can be deleted (processed: inserted) or retained

Today we are going to discuss with you how to use DB2 Resotre when using TSM. If you are curious about the usage skills of DB2 Resotre when using TSM, the following articles will unveil its secrets. The following is a detailed description of the

This article mainly tells you about the performance of DB2 9 XML in the real environment. The following describes the performance of DB2 9 XML in the real environment, if you are curious about it, the following articles will unveil its

The following articles mainly show you the latest developments in the development of the DB2 client. Are you confused about this, that is to say, does the IBM DB2 development team really consider all these open source explanatory languages and rich

This article mainly explains how to delete the DB2 admin administrator account. When installing the DB2 database, we need to enter a user name for it, this user name is used as the user name of your future Computer Administrator. The default

This article mainly tells you about the DB2 database troubleshooting and its best practices. In practice, there are many database problems that are generally caused by incorrect operations, this error is caused by incorrect configuration 2.

For databases, it is nothing more than adding, deleting, modifying, and querying. Generally, in project applications, READ operations account for more than 50% of the operations, and customers are usually sensitive to this, it is not easy to handle

Now you can directly connect to replica-set and log on to primary. For example: Mongo -- host rs1/vm1: 27017, vm3: 27017, vm4: 27017 db_name, and a bunch of information is displayed. Thu Dec 12 16:44:48. 227 successfully connected to seed vm1: 27017

IBM uses Stinger to name the new version of DB2 Universal Database, which shows that this product will have fast, powerful, and efficient features, using the "Stinger" independent database, it can automatically handle maintenance tasks such as fault