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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 ...
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 ...
To use Hadoop, data consolidation is critical and hbase is widely used. In general, you need to transfer data from existing types of databases or data files to HBase for different scenario patterns. The common approach is to use the Put method in the HBase API, to use the HBase Bulk Load tool, and to use a custom mapreduce job. The book "HBase Administration Cookbook" has a detailed description of these three ways, by Imp ...
Absrtact: 7 years ago, one of the ideas, the success of today's popular social network and microblogging service--twitter. Twitter now has more than 200 million monthly active subscribers, and about 500 million tweets are sent every day. Behind all this is the support of a large number of open source projects. Twitter, known as the "Internet SMS Service", allows users to post no more than 140 tweets, the idea from Twitter's co-founder, Jack Dorsey, which was dubbed "the dumbest Ever" by analysts 7 years ago ...
Awareness of the entire http://www.aliyun.com/zixun/aggregation/11116.html "> Site map is as follows: Know almost is a very few websites developed using Python, but also a lot of places we learn, From Knowing so that we can also understand some of the new WEB technology. First, the Python framework Knowing the current use of the Tornado framework. Tornado full name Tornado Web Ser ...
Absrtact: When planning to develop a website, what language to choose, is the first problem to face. The current mainstream web development language has asp.net, PHP, JSP; As Ms veteran of the last century ASP, it is no longer mentioned, if it is because of maintenance reasons and must use, in the plan to develop a website, choose what language, is the first problem to face. The current mainstream web development language has asp.net, PHP, JSP; As Ms last century veteran ASP, no longer mentioned, if it is because of maintenance reasons must be used, ...
One, the charm of the management of cloud computing is that users can start using their ID card and credit card, but that's the problem. Such a simple service is bound to bring many challenges to the unprepared IT department. We've been through this many times before: the benefits of a technology that are easy to use end up being an unexpected management challenge, such as virtualization, which causes virtual machines to become fragmented, new security risks to smartphones, and instant messaging that triggers corporate governance problems. This article is intended to show IT managers how to maximize cloud computing ...
Intermediary transaction SEO diagnosis Taobao guest Cloud host Technology Hall 1, what is the directory submission? Everyone is familiar with the phone or directory Yellow pages. They contain a list of people or sorts of businesses in alphabetical order or by category. Internet directories are basically the same, but they are known as web directories or online catalogs, and they are by category sites. In order for your site to be listed on these pages, you must first submit to the directory. If you do not submit your site directory differently, users will not be able to find your site unless they know what is due to an accident or input ...
Absrtact: 1, what is the hottest and most famous High-tech start-up company in Silicon Valley? In Silicon Valley, we are very enthusiastic about the opportunity to talk about entrepreneurship, I also through their own some observation and accumulation, saw a lot of recent years, the emergence of the popular start-up companies. I'll give you a 1. What are the hottest and most famous High-tech startups in Silicon Valley at the moment? In Silicon Valley, we are very enthusiastic about the opportunity to talk about entrepreneurship, I also through their own some observation and accumulation, saw a lot of recent years, the emergence of the popular start-up companies. I give you a list, this is China ...
One of the features of cloud computing is the ability to move applications from one processor environment to another. This feature requires a target operating system to receive it before moving the application. Wouldn't it be nice if you could automate the installation of a new operating system? A well-known feature of the intel™ architecture system is the ability to install Linux automatically. However, installing Linux automatically is a tricky issue for System P or IBM power BAE using the hardware management console. This article discusses the solution of ...
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