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query optimizer Apache Hive uses calcite for cost-based query optimization, while Apache Drill and Apache Kylin use the SQL parser.The calcite team launched 5 releases in 2016, including bug fixes and new adapters for Cassandra, Druid, and Elasticsearch.Apache KylinApache Kylin is an OLAP engine with a SQL interface. Developed by ebay and donated to Apache,kylin in 2015 to become a top-notch project.Founded in 2016, Kyligence offers business support and a data warehousing product called KA

In this article, we compile some interesting and creative examples of landing page design to help you quickly master landing page design techniques. Landing pages (Landing pages) require a special design that captures the attention of the target audience and competes with millions of websites. Landing pages are important to help the site convert visitors into sales. Therefore, the message of the product must be clear, the design must be attractive and easy to understand. Landing page design sho

We often say that the design should be crisp and concise, at a glance. Recently we have seen fashionable design trends towards the plane, and today we want to share the design of this kind of page-pricing page design. Many times when you jump from the homepage to the pricing page feel to another site, and the importance of pricing pages is self-evident, want a higher conversion rate may wish to work more on this. Source: WDL Anyperk Audible Barkbox Campai

Accustomed to see the same 404, to feel today this wave vision clean and refreshing, copy with a little humor creative 404 page. Want to learn, the end of the article is attached to two free commercial 404 page template Source files, anger turn bar. Note: The students with millet router Remember to hijack the network of routers, or they will access the error. wearespry–404 Error Page cayenne–404 Error Page kwarter–404 Error Page Charles clinkard–404 Error

good things about 404 in the set. Next, take a look at the collection of the 404 error pages that you recommend below to see how other designers are using ideas to defuse embarrassment. While designers and developers try to avoid users encountering 404, when users inevitably plunge into the wrong page, they want users to try to stay in the web for a little while. Therefore, in the design of 404 pages, the emotional design is the primary task, and then supplemented by appropriate functions and

original data carrier in the process of full and incremental indexing, in order to give full play to the real-time nature of the search engine, the level of scalability (performance and capacity and the number of machines in direct proportion) and other advantages. As with databases, the indexing mechanism for search engines also needs to be understood in depth. More detailed for the Search engine engineering practice can refer to the likes of the engineer's article: A good Search engine practi

ecosystem. As a new language, Go has a lot of new versions since we started developing our products. Some of the changes in these new versions are not backwards compatible, so to use the latest version of the library, we often rewrite the existing code and examine the hack we have done to resolve the version issue. These two libraries are the main components of most Web services, so making a good choice is important because future changes can be difficult and affect the performance of your ser

"Todo Dev" scheme to run the project, you create a development version that automatically sets the server's configuration to the development environment. Now you can upload the development version to TestFlight or Hockeyapp for testers and managers to test.Then if you need to create a production version, you can simply choose "Todo" scheme. No code changes are required.Some considerations for managing multiple target1. When you add new files to the project, do not forget to select two target to

app's settings.Now, when you select "Todo Dev" scheme and run this project, you will automatically create the development version and the server configuration settings for the development environment. You can now upload a development version to TestFlight or Hockeyapp for testing by testers and managers.Then, if you need to create a production version, simply select "Todo" scheme. No code changes are required.Some tips for managing multiple targets1. When adding a new file to a project, don't f

Help do a lot of web site statistics, such as Google Analytics, Baidu Statistics, Mixpanel, and so on, but these can not be deployed on their own server statistical services. Piwik is a PHP and MySQL implementation of open-source web statistics software, can generate a lot of useful web site statistics reports, but also through the plug-in to expand functionality.Piwik Introduction of Piwik Features Open source projects; No data storage l

A website must have a certain appeal, but also have more eye-catching elements to catch the attention of visitors at the first time, only then they will be willing to read the text content. The following for our said to give some cases, with you to share a series of excellent with icon sites, these sites give full play to the characteristics of the icon, take a look at it! Slow speed of the students please wait patiently, the case is quite wonderful yo! Siaperitivos Blocklevel

Flat style more and more popular, I believe that designers have their own unique views, today collected a flat style landing page design, hoping to bring you inspiration yo. Siteleaf Mixpanel Bee Logolagoon Kin Envato marketplaces Foundation Pebble Surveyplanet Pressking Treehouse Clogout Modulz

the current location without having to interrupt the process to find the answers in the station.It's really a shame to lose customers at this stage because of design flaws. Metrics : Channel and/or path to use Scenario : If you have a budget, I recommend using Kissmetrics,mixpanel or performable to track the channels and paths of transformation.If not, you can consider the Google Analytics target and channel tracking, or use Paditrack, a free chann

have been added to the white list. It also means that the only user ID mentioned above will be sent to the website every time the user accesses getadblock.com, and the Adblock user accesses getadblock.com.malicious.com and any website with getadblock.com in the hostname. is also sent. If I had a website that was maintained by ad revenue, I would insert a hidden box on each page and use this bug to track Adblock users--maybe some sites have come to me? How does the change log describe these chan

answers. While there are analytical tools such as Mixpanel and Google Analytics, these do not capture all the details of the product. Therefore, learning SQL will allow you to spend the least amount of money and get more details about the product. Data Analyst Many data analysts initially used Excel for data management and analysis. This is absolutely true, because Excel is more flexible than SQL iterative analysis. Excel is not good at scaling in th