Mongodb Make Field Unique

"Editor's note" in the "Pioneer" series of business, High-performance, Wang Tao to build beyond the MongoDB NoSQL, we and Wang Tao talk about High-performance, have a business sequoiadb build experience. Readers need to interpret the advantages of each nosql from the data, we also invited relevant experts at home and abroad to MongoDB, SEQUOIADB, Cassandra, hbase four NoSQL Benchmarking, and published test cases, related data and test rules. This time we will give you the test of domestic experts, ...

Over the past few years, NoSQL database with its easy to expand, high-performance, high availability, data model flexibility and other features attracted a large number of emerging internet companies, including the domestic Taobao, Sina, Jingdong Mall, 360, Sogou, etc. have been in the local attempt to NoSQL solutions. Guangzhou giant FIR Database is a focus on the new NoSQL distributed database research and development of the start-up company, has now won the first round of angel investment, the core product is sequoiadb. The founding team members of the giant FIR database are from IBM North America Laboratories, and have long been engaged in the relational database D ...

The "SaaS Pioneer" series continues to present you as a pioneer in the domestic SaaS sector, and today's protagonist, Processon,processon, is a vertical mapping tool and community where users can not only feel a very powerful and useful professional mapping tool, can also easily find their own knowledge resources, inadvertently, may also find a lot of vertical areas of "Daniel" in the sharing of their work. In fact, ProcessOn is to do a cutting-edge, efficient mapping tool, of course, can also be simply understood as "cloud computing era, Microsoft V ...

The "SaaS Pioneer" series continues to present you as a pioneer in the domestic SaaS sector, and today's protagonist, Processon,processon, is a vertical mapping tool and community where users can not only feel a very powerful and useful professional mapping tool, can also easily find their own knowledge resources, inadvertently, may also find a lot of vertical areas of "Daniel" in the sharing of their work. In fact, ProcessOn is to do a cutting-edge, efficient mapping tool, of course, can also be simply understood as "cloud computing era, Microsoft V ...

Taxis, buses, passenger buses, heavy goods vehicles ..., operating vehicles occupy an important position in urban traffic, and people's lives and even social development has an important relationship. 　　It has become an indispensable part of intelligent traffic construction to build an information platform, monitor and manage the operating vehicles, standardize the vehicle behavior and establish a good operation order. "National Transportation Supervision Service Platform" is one of the important products developed by Beijing Zhong Xing Road Information Technology Co., Ltd. (hereinafter referred to as "Zhong Xing Lu"), which is committed to the monitoring, management and information interaction of the national freight vehicle, in full ...

The document database of NoSQL database technical characteristics Today's cloud computing practitioners are not unfamiliar with the term nosql, though many technicians have long been working on relational databases, but now they are looking forward to nosql technology. The transition from relational to NoSQL databases is definitely a big change to be considered for businesses. This involves not only the changes in software, but also the conceptual changes in data storage. Most non-relational databases have fast and scalable features. By discarding relational storage models and schemas, relationships ...

Before 2013, there may be a wait-and-see or scepticism about the cloud, but after a year of development, cloud computing has completely landed: Big companies are busy with how to deliver faster, more stable and safer cloud services, how to snatch users in the cloud market, and small companies to consider how to use cloud computing to reduce their operating costs. How to make your system into a cloud structure; startups think about how to use the cloud to reduce upfront spending, and even how to use the concept of "cloud" to start a business and sell yourself in front of a VC. According to Gartner, 2013 Global ...

If all goes according to plan, Red Hat will be the first Open-source software vendor to make more than 1 billion dollars a yearly income. This will be a turning point for the open source software community. The open source community has always believed that their community-based approach to development is feasible, even superior, and alternative to traditional software development methods. ' I think we're going to see a fundamental shift in where technological innovation will take place, from the labs of several software companies to the huge open source soft ..., ' said Red Hat CEO Jim Whitehest Jim Whitehurst.

"Guide" Xu Hanbin has been in Alibaba and Tencent engaged in more than 4 years of technical research and development work, responsible for the daily request over billion web system upgrades and refactoring, at present in Xiaoman technology entrepreneurship, engaged in SaaS service technology construction. The electric dealer's second kill and buys, to us, is not a strange thing. However, from a technical standpoint, this is a great test for the web system. When a web system receives tens or even more requests in a second, system optimization and stability are critical. This time we will focus on the second kill and snapping of the technology implementation and ...

Absrtact: I know that when we think of the hot land of startups, it's probably not the French country that jumps out of the mind. Admittedly, some interesting things are happening in the European tech circle, in London, or Berlin (as I wrote in my previous blog), and I know that when we think of the hot land of startups, it's probably not the French nation that jumps out of the mind. Admittedly, some interesting things are happening in the European tech Circle-London, or Berlin (as I wrote in my previous blog), and even Finland. But France? Casually ask ...