How To Find The Median Of Two Numbers

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Large Data processing interview problem summary

1. Given a, b two files, each store 5 billion URLs, each URL accounted for 64 bytes, memory limit is 4G, let you find a, b file common URL? Scenario 1: The size of each file can be estimated to be 50gx64=320g, far larger than the memory limit of 4G. So it is not possible to fully load it into memory processing.   Consider adopting a divide-and-conquer approach. s traverses file A, asks for each URL, and then stores the URL to 1000 small files (recorded) based on the values obtained. This ...

A test of the way of shoes electric business: Where is the cost depression

The intermediary transaction SEO diagnoses Taobao guest stationmaster buys cloud host technology Hall the article/World Net merchant Yang Qin expensive rents, the increasing manpower cost, the tedious promotion incidental expenses, presses under the line retailer to gasp the breath. E-commerce using the "electronic" technology, all of a sudden out of the line of the heavy store rental costs, but also seems to be able to some extent to improve the efficiency of labor, reduce human costs.   The whole e-commerce seems to be a cost of depression, many heroes to bow. When everyone plunged into the market, found that the reality is not as imagined ...

Big data analysis old birds give rookie learn from the experience of the younger brothers

The author of this article: Wuyuchuan &http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; The following is my experience in the past three years to do all kinds of measurement and statistical analysis of the deepest feelings, or can be helpful to everyone. Of course, it is not ABC's tutorial, nor detailed data analysis method introduction, it is only "summary" and "experience." Because what I have done is very miscellaneous, I do not learn statistics, mathematics out ...

Marketing Enemies

Virus? Micro movies? Augmented reality? If you don't know what your brand is saying, don't say anything. We are the stories we tell (we are the story). These words almost fill up the entire tether company's official homepage. You probably don't know what tether is, or who its founder Stanley Hainzworth is, but you must know Nike, Lego and Starbucks three companies. Stanley Hainzworth has served as the three ...

Stop bluffing! Do we really need to burn money blindly to pursue big data?

Big data is probably the hottest technical term now. Heat means there is a bubble, there is a place worthy of reflection. Quartz's Christopher Mims May 6 published an article, called "Most of the data is not large, pretending that big data is actually a blind waste of money", justified, recommended first read. If you're not in the big data camp now, try to get some. After all, competition requires big data. If you have a small amount of data, you will be completely defeated by your competitors ...

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Stop bluffing! Do we really need to burn money blindly to pursue big data?

Big data is probably the hottest technical term now. Heat means there is a bubble, there is a place worthy of reflection. Quartz's Christopher Mims May 6 published an article, called "Most of the data is not large, pretending that big data is actually a blind waste of money", justified, recommended first read. If you're not in the big data camp now, try to get some. After all, competition requires big data. If you have a small amount of data, you will be completely defeated by your competitors ...

Lei Watch Zealer? Why?

"High quality maintenance." "This should be said to be the sexiest five words at the ZEALER2.0 conference site, even more than countless stems."     And the mute "bbb!." Since the first imac video in March 2010, Wang freely as a stubborn Lord of the existence of the general, experience products, praise cool comments. In 4 years, more than 300 videos, while the average hits millions.   His fast-aggressive language style and the death of the product of the obsession, almost become the hardware evaluation of the first brand. The charm of the family linan ...

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