Mongodb How To

MongoDB is an extensible, high-performance, open source NoSQL database, written in C + + language. MongoDB features oriented document documents (objects) will well map to programming language data types embedded files and arrays reduce the need to join dynamic typing (modeless) easy to structure evolution no connection high performance and no easy to expand multi-document transactions high performance no connectivity and embedding for faster read and write Indexed optional Stream writes (no acknowledgement) of indexes that include keys from embedded documents and arrays include the index from embedded documents and numbers ...

MongoDB in the latest version of the 2.4 User Rights Management made a new adjustment, the permissions are refined, enhanced security, more and more like the permissions of MySQL management. 2.4 Before the version of User Management 1, the creation of a database management user 1.1, access to the WEIW database: >use weiw; 1.2, add users (Read and write permissions, Readonly-->false): >db.adduser ("java", "Ja ...)

In mailbox rapid expansion process, one of the performance problems is the MongoDB database level write lock, the time spent in the lock waiting process, directly reflects the user's use of the service process delay. To address this long-standing problem, we decided to migrate a common set of MongoDB (storing mail-related data) to a separate cluster. According to our inference, this will reduce the lock latency by 50%, and we can add more fragments, and we expect to be able to optimize and manage different types of data independently. We start from Mon ...

India's unique identification project (also known as the Aadhar Plan), which recently completed the collection of demographic and biometric data, is currently the largest of its kind in the world. The project, which has been in operation for several years, has been subject to conflicting voices from all sides, from privacy and security to other sources. At the same time, the latest developments in the Aadhar project have raised concerns about its methods of capturing, storing, and managing data, especially an American start-up company, Mongo ...

"Editor's note" This blog author Luke Lovett is the MongoDB company's Java engineer, he demonstrated MONGO connector after 2 years of development after the metamorphosis-complete connector at both ends of the synchronization update. , Luke also shows how to implement fuzzy matching by Elasticsearch. The following is a translation: the introduction assumes that you are running MongoDB. Great, now that you have an exact match for all the queries that are based on the database. Now, imagine that you're building a text search work in your application ...

India's unique identification project (also known as the Aadhar Plan), which completed the collection of demographic and biometric data earlier this week, was more than 500 million Indians-the largest of its kind in the world today. The implementation of the project has been accompanied by conflicting voices from privacy and security as well as other aspects. The latest developments in the Aadhar project have raised concerns about its methods of capturing, storing, and managing data, especially an American start-up company ...

India's unique identification project (also known as the Aadhar Plan), which completed the collection of demographic and biometric data earlier this week, was more than 500 million Indians-the largest of its kind in the world today. The implementation of the project has been accompanied by conflicting voices from privacy and security as well as other aspects. The latest developments in the Aadhar project have raised concerns about its methods of capturing, storing, and managing data, especially an American start-up company ...

Today's article comes from 10gen software engineer Sridhar Nanjundeswaran. 10gen developed the http://www.aliyun.com/zixun/aggregation/13461.html ">mongodb, and provides product support, training and open source database consulting." We are excited about the continuous cooperation between 10gen and Microsoft. We are actively leveraging the new features of Windows Azure to ensure that wind ...

Several years of work down, also used several kinds of database, accurate point is "database management system", relational database, there are nosql. Relational database: 1.MySQL: Open source, high performance, low cost, high reliability (these features tend to make him the preferred database for many companies and projects), for a large scale Web application, we are familiar with such as Wikipedia, Google, and Facebook are the use of MySQL. But the current Oracle takeover of MySQL may give us the prospect of using MySQL for free ...

The main content of this paper comes from MongoDB official blog, supplemented by Nosqlfan, this paper analyzes the traditional distributed cache system, and points out that it will bring great pressure to the database in cache reconstruction. and analyzes how MongoDB's mmap scheme avoids this problem. The following diagram of the architecture, in the database front-end with a distributed cache (such as our common memcached), so that the client to access the first lookup Cache,cache not hit the read the database and cache the structure in CAC ...

With the rise of internet web2.0 websites, the relational database has become a very hot new field, the development of the non relational database products is very rapid. 　　But the traditional relational database in dealing with web2.0 website, especially the super large-scale and high concurrent SNS type web2.0 pure dynamic website already appeared to be powerless, has exposed many insurmountable problems, for example: 1, high configured--to the database higher concurrent reads and writes the demand WEB2.0 website to be based on user personalized information to generate real-time dynamic ...

10gen is a cloud computing platform that can provide scalable, high-performance data storage solutions for Web applications. 10gen Open Source project is MongoDB, the main function is to solve the website of operational data storage, session object storage, data caching, efficient real-time count (such as statistical pv,uv), and support ruby,python,java,c++, PHP and many other page languages. MongoDB main feature is the storage of data is very convenient, not the traditional object-rel ...

After completing one of the biggest projects of the year, the focus is shifting from PM's role to storage-related work, so it took some time outside of the work to focus on NoSQL related information (mainly from blog.nosqlfan.com) NoSQL related [translate] nosql ecosystem Http://blog.nosqlfan.com/html/2171.html//This is the best and most complete document I have seen NoSQL speak about nos ...

As a http://www.aliyun.com/zixun/aggregation/6434.html "> software developer, we value the abstraction of things." The simpler the API, the more attractive it is to us. 　　Dialectically, the biggest advantage of MongoDB is the "elegant" API and its agility, which makes the coding process of developers unusually simple. However, when MongoDB involves large data scalability issues, developers still need to know the bottom of it ...

The chief technical officer of Schindler Yuncheng (Speedycloud) Dong at the meeting with a speech entitled "Automation extension of NoSQL cluster on the Yunping platform". Demonstrates how to create and initialize a NoSQL cluster on a cloud host, and how to detect a host failure through a monitoring system, and automatically invoke the cloud API for faulty device replacement, and finally show how to destroy a host from the command line. But because the time is hasty, did not give the small partner to leave too many time to carry on the question solution and the difficulty detailed introduction, therefore dong in ...

Naresh Kumar, a software engineer and enthusiastic blogger, has great interest in programming and new things, and is happy to share technical research results with other developers and programmers. 　　Recently, Naresh wrote about 12 well-known free, open source NoSQL databases, and analyzed the characteristics of these databases. Now that the NoSQL database is becoming more and more popular, I'm here to summarize some of the great, free and open source NoSQL databases. In these databases, MongoDB the top, with considerable ...

Hot week: Don't blame open source technology it's innocent. Posted 23 hours ago | Times Read | SOURCE csdn| 0 Reviews | Author Wang Cloud hotspot open source Google Amazon IBM Transistor MongoDB Summary: This week's content: Open source technology is important, please do not give it for security problems, for the load after the 42 "monster" level problem, how should we solve? Google GCE vs. Amazon EC2, who is stronger, and Google and other Internet companies will become innovation centers? Four misunderstandings and four conjectures based on IaaS;

In the past few years, relational databases have been the only choice for data persistence, and data workers are considering only filtering in these traditional databases, such as SQL Server, Oracle, or MySQL. Even make some default choices, such as using. NET will typically choose SQL Server, and Java may be biased toward Oracle,ruby, Mysql,python is PostgreSQL or MySQL, and so on. The reason is simple: In the past a long time, the relational database is robust ...

Splunk recently announced the launch of version 6.1 Hunk:splunk Analytics for Hadoop and NoSQL data Stores for Hadoop and NoSQL data Stores. Hunk 6.1 makes it quicker and easier to convert raw unstructured data from Hadoop and NoSQL data storage into business insights. Hunk's upgrade report significantly shortens reporting time, while interactive dashboards provide rich self-help analysis without the need to ...

Type selection and design of bigtable NoSQL database release time: 2012.04.16 14:20 Source: Blog Author: Blog This paper introduces the selection strategy and schema design principle of Bigtable/hbase type NoSQL database system. Data scale BigTable Class database system (Hbase,cassandra, etc.) is to solve ...