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Voldemortwho is using: GitHub (Riak), BestBuy (Riak), Twitter (Redis and Memcached), StackOverflow (Redis), Instagram (Redis), Youtube (Memcached), Wikipedia (Memcached)Applicable scenariosStore user information, such as sessions, configuration files, parameters, shopping carts, and more. This information is usually linked to the ID (key), which is a good choice for a key-value database.Scenario Not applicable1. instead of querying by key, query by v

statistical analysis are very good, production efficiency is much higher than c,c++,java, especially good at strategy backtesting graphical GUI: PyQT, Wxpython,tkinter Python is used in some companies: Google : Google App Engine, code.google.com, Google Earth, Google crawlers, Google ads and other projects are heavily used in Python development CIA: The US CIA website was developed in Python. NASA: NASA uses Python for data analysis and computation YouTube: The wor

).third-party APIs (third) are not installed in the browser by default, and you usually need to get their code and information from somewhere on the network. As an example: Tweet API [Twitter API] allows you to do things like show your latest push on your website. Google Maps API [Google Maps API] allows you to embed custom maps into your site, and other features. Note: These APIs are advanced and we do not involve any of these APIs in the course, but if you want to learn more,

addition, Mcrouter by Facebook at last year's [email protected] conference, and open source recently, is about to become Facebook in the new TODO Open Source Collaborative Alliance Open source of the first technology. According to Facebook, Mcrouter can quickly allocate call data in the cache layer of a server cluster on Facebook's data centers around the world, which is highly adaptable and can peak up to 5 billion requests per second. Last year, the technology was used to move the

product owners want to use only the most popular and popular technologies in their projectsIn this case, if only to develop but regardless of the technical direction, it is likely that the end result is no customer and work.Other wordsBefore you learn anything, make sure that the things you want to learn are in line with the trends over the next 1, 5, or 10 years.PHP and Python are among the most popular programming languages in the world, and there's no need to worry.PHP is used to build many

sites use the horizontal scrolling way to display the page, although horizontal scrolling in some cases can really give viewers a different browsing experience, but the horizontal scrolling drag and drop, users are cumbersome to operate, so it is recommended not to easily try to use this horizontal scrolling. 3. Too many share buttons Although the social nature of the site is growing, there is no need to list all the social media sharing buttons on the page. In general, the share button only

Although there are too many ways to adjust the tone of the nostalgic wind today, Instagram, Lightroom presets, and even picmonkey this kind of online repair programs are exceptionally convenient, but their own personal tone issued by the individual style, has always been very interesting. This is an introduction to the PS of a very simple function "gradient" (gradient Map), can help you pull out a very tasty effect. 1 first open a piece that you thin

Speaking of photo style, we will think of Japanese, LOMO, and so on. The use of Photoshop filter function, and the same channel, layer and other joint use, in order to achieve the best artistic effect. Now there are a lot of software filter functions, so that the photo style is no longer as complex as PS. Instagram is attractive because of the many filters it has built into it, even if the flat photos taken by the phone can become very atmosphere. Ver

the specific interface, this process is continuous, It's the same with you stretching out the fridge door and seeing the fruit and vegetable drinks inside. Plainly, the application of the icon is part of the product, is the shape and entrance of the product, in the application design, the application of the image of the icon has become a way to improve product recognition. Users have the habit of classifying the application, imagine if the music folder is a bunch of different color

"homogeneous" design. 5. Use large images to create visual effects There is an indisputable fact that more and more sites in their home page with large images to highlight the impact, and the site will be self-regulation, ready enough broadband and data, only on the big screen will be displayed in this way. 6. Give readers more blank space The trend began in 2012, responsive design and the now-admired clean-style aesthetics (refer to the new MySpace design), and the

Recommended:Cyrotel 2014/08/21 in Cool station recommended moreThe last excellent to share 10 HD uncensored Pictures Library, unexpectedly have a classmate comments under the good life of the people, the anger, small make up the meaning of the non-stop carefully selected the 15 large map site, quality, look comfortable, not worried about the eyes. With a comfortable, don't worry about infringement. Look fascinated, also need not nervous, forever free download. It's so great!Yes, the last time th

We might be interested in the filter action on the Instagram IPhone APP, which originally CSS3 the filter (not the IE filter), which was originally used for SVG, which was introduced into CSS3, and then developed a CSS filter E Ffects 1.0 's specification, Webkit first supported it.The use of-webkit-filter-webkit-filter usage is a normative CSS notation, such as:-webkit-filter:blur (2px);The role of-webkit-filter support is: Blur Vague Br

all the devices. Instead, think about who your ideal picture viewer is, and how they are most likely to browse the picture, and then follow that line of thought. For example, images like Facebook, Instagram and Twitter are not the same size, and most people are telling smartphones to look at these images, which can be optimized by this feature. For web design, you can use responsive design, so that the picture according to the screen size dynamically

Wait so long, finally wait until Tencent's Apple Watch version of the application. Today, Tencent's DD students will design the initial plan, competitive analysis, thinking process, such as sharing out, want to dabble in the watch platform of students, this article has to seriously study under. 　　Initial programme Early in the design, we hope to be able to tap some users in the mobile phone-side commonly used points to extend, such as: visitors, gifts, dynamic. including color and

of picture Display class website, Gao Guang what still has how far to roll how far good. High-resolution pictures to load as fast as possible, after all, is a large file. So keep in mind that when you design animations, load effects, and other effects, be sure that the picture loads are unaffected, and if it does, don't use these techniques or effects. As much as possible to simplify the effects and dynamic, parallax scrolling is not bad, at least the picture has no direct impact. 　　6. Design

that won't happen in the next 18 months. Remember one of the most important things that an iphone app needs to look and use like an iphone app; Android apps have to be like an Android app; If you want to cross the platform, make sure you know what the native apps look like first, Will not sacrifice the user experience. I also think that HTML5 will eventually lead the trend, but the overall application and acceptance is not imminent. Whether using HTML 5 cross-platform or using native applicati

that are good enough often include many smooth, seamless, excellent micro-interactions to communicate different interfaces, actions, and interactions. Micro-interactions are often easily overlooked, but in many apps they exist as a necessary transition, interaction guidance, and effect hint, so it is quite important. The existence of micro-interaction, mainly to help users to complete some things. From text message notification, message push to micro blog on the tip of praise, almost everywher

Circular elements are widely used in interface design, from common circular icons to rounded heads or rounded contour shapes. A circle is a special shape that can be quickly noticed by us in many geometric shapes. As such, there are a few caveats when designing an interface with a round element. 　One, round Head Looking around, the rounded avatar has occupied our mobile phone. Take a look at these examples below, as shown in the following illustration. From left to right in turn i

The style of web design is varied, but the illustration wind is never outdated. Illustrations allow designers to express their own rich creativity and imagination, the use of illustrations in the design will make the Web page become more interesting. Today we have collected 15 examples of web design cases using illustrations to feel the creativity of these designers. Abby Putinski Activate Media Awesome Fantasy comic book Adventure Caitlin Wicker

it a feature word, and then judge whether the distance between them is What are the options for distribution, and which one is best? Answer technique: First of all, what is the plan to analyze which one is good? Celery, Beanstalk,gearman personally think Gearman better.The main reasons are as follows: 1). Simple type of technology, low maintenance cost. 2). Simplicity is paramount. Can meet current technical requirements (distributed task processing, simultaneous support of asynchronous