Mongodb Location

In our daily life, we are inseparable from the application of position recognition class. Apps like Foursquare and Facebook help us share our current location (or the sights we're visiting) with our family and friends. Apps like Google Local help us find out what services or businesses we need around our current location. So, if we need to find a café that's closest to us, we can get a quick suggestion via Google Local and start right away. This not only greatly facilitates the daily life, ...

NoSQL has been in vogue for a long time, so what exactly is the scene you need to use these "emerging things", such as http://www.aliyun.com/zixun/aggregation/13461.html ">mongodb?" Here are some summaries: you expect a higher write load by default, compare transaction security, MongoDB more attention to high insertion speed. If you need to load a lot of low-value business data, then MONGO ...

"51CTO classic" MongoDB and Couchdb are both document-oriented databases that use JSON document formats that are often viewed as NoSQL databases and are now fashionable and have a lot in common, but when it comes to queries, the difference is obvious, COUCHDB requires predefined views (essentially JavaScript mapreduce functions), while MONGODB supports dynamic queries (essentially similar to ad hoc queries on traditional relational databases), and more importantly, when it comes to queries, Co ...

MongoDB released the 1.6.0 version, which is the fourth major stable version of the 1.0,1.2,1.4 version, and released the 1.6.1 release on August 17. This release focuses on enhanced dynamic expansion (Scale-out) features, http://www.aliyun.com/zixun/aggregation/14273.html ">sharding functionality is already available in the production environment." Use both horizontal and replication collections (replica sets ...).

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp;1.find MongoDB uses Find to query. The query is to return a subset of the files in the set. The child collection ranges from 0 documents to the entire collection. The first parameter of find determines which documents to return. The form is also a document that describes the details to be queried. The empty query document {} matches the entire contents of the collection. If you don't specify ...

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 ...

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 ...

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 ...