Service Based Database Vs Local Database

Overview 2.1.1 Why a Workflow Dispatching System A complete data analysis system is usually composed of a large number of task units: shell scripts, java programs, mapreduce programs, hive scripts, etc. There is a time-dependent contextual dependency between task units In order to organize such a complex execution plan well, a workflow scheduling system is needed to schedule execution; for example, we might have a requirement that a business system produce 20G raw data a day and we process it every day, Processing steps are as follows: ...

With the explosion of information, micro-blogging website Twitter was born. It is no exaggeration to describe Twitter's growth with the word "born". Twitter has grown from 0 to 66,000 since May 2006, when the number of Twitter users rose to 1.5 in December 2007. Another year, December 2008, Twitter's number of users reached 5 million. [1] The success of Twitter is a prerequisite for the ability to provide services to tens of millions of users at the same time and to deliver services faster. [2,3,4 ...

The hardware environment usually uses a blade server based on Intel or AMD CPUs to build a cluster system. To reduce costs, outdated hardware that has been discontinued is used. Node has local memory and hard disk, connected through high-speed switches (usually Gigabit switches), if the cluster nodes are many, you can also use the hierarchical exchange. The nodes in the cluster are peer-to-peer (all resources can be reduced to the same configuration), but this is not necessary. Operating system Linux or windows system configuration HPCC cluster with two configurations: ...

As early as the summer of 2013, a series of articles on data centers were written, called "The Apocalypse of Zombies in the data center". The first story is about IBM's predicament. IBM was trying to make a deep role transition-from a company that provides data center services to a subsidiary of outsourcing-to become a more cloud-focused IT industry leader. 　　Another is to explore how, as an IT industry practitioner, how to adapt their skills to more cloud-oriented status. A year has passed, how is the situation now? I ...

A loud bang, Cool day with Pipa debut, China's electric business is about to stage the U.S. armed attack on the Bay of Pigs in Cuba incident. On the first day of the line, the home page is not all brush, to wait about 10 seconds, Ui/ue is not in line with the use of Chinese habits, Web site features a lot of mistakes, a look is rushed online, and the merchant also did not see any bright spot, and obviously not ready. After half a month and pay attention to the next, more fun: Website traffic daily average PV tens of thousands of (mostly still industry people to see), a Amoy brand big business almost no orders, the home page open or so slow, see any ...

This year, big data has become a topic in many companies. While there is no standard definition to explain what "big Data" is, Hadoop has become the de facto standard for dealing with large data. Almost all large software providers, including IBM, Oracle, SAP, and even Microsoft, use Hadoop. However, when you have decided to use Hadoop to handle large data, the first problem is how to start and what product to choose. You have a variety of options to install a version of Hadoop and achieve large data processing ...

The advent of the HTML5 makes mobile platform competition from the system platform to the browser: Mobile end of IE, Chrome, FireFox, Safari, or new browsers, who can achieve on the mobile end of the HTML5 better support, Who will be able to occupy more market in the future mobile application field. Now how do we install the app with the HTML5? The more flexible and convenient app usage and installation will be one of the HTML5 to shine on the mobile platform. The following list HTML5 ...

Because of the lack of enterprise-class product contact to understand, many users, a contact server, Web page production, such as office information preparation, can not help but some confused. 　　Not only that, the current chaotic medium and low-end server market also allows buyers to sigh, especially true and false server discrimination often let these laymen overwhelmed. With the continuous deepening of the server differentiation and information process, the development of small and medium-sized enterprises can not be separated from the construction of local area network, server and other basic information needs. But at the same time, most of the small and medium-sized server requirements are general, performance requirements are also very general, so manufacturers needle ...

Strong "micro-trust", social entrepreneurship in the end there is no chance? If the answer is no, many entrepreneurs will not be reconciled. From happy net to Micro Bo, from micro-bo to micro-letter, when the hot social products, the ups and downs, how many lonely there is a big chance. If the answer is yes, then the question is, where is the opportunity? Is it a vertical social field? Is it the use of new media? Or a new form? In search of this answer, NetEase tech editors have spent two months investigating the early startups and startups in the mobile social arena, interviewing more than 20 CEOs and investing ...