Tag: testing

Feed: Big Data Made Simple. Author: Baiju NT. This is an age of machine learning algorithms! They can predict stock market fluctuations, control complex manufacturing processes, enable navigation for robots and driverless vehicles, and much more. Now, a group of researchers has found a way to predict and control chemical reactions with precision and speed.The technique was developed by researchers at the NYU Tandon School of Engineering, tapping the capabilities of artificial intelligence, artificial neural networks, and infrared thermal imaging and it can allow chemical discoveries to take place quickly and with far less environmental waste than standard large-scale reactions.“This ... Read More

Feed: Planet MySQL; Author: Valeriy Kravchuk; From the lack of comments to my previous post it seems everything is clear with ERROR 1213 in different kinds and forks of MySQL. I may still write a post of two about MyRocks or TokuDB deadlocks one day, but let's get back to my main topic of MySQL bugs. Today I continue my series of posts about community bug reports I am subscribed to with a review of bugs reported in November, 2018, starting from the oldest and skipping those MySQL 8 regression ones I've already commented on. I also skip documentation bugs ... Read More

Feed: Planet PostgreSQL. The following commit has happened in Postgres 12, adding a feature which allows to control and potentially enforce the protocol SSL connections can use when connecting to the server: commit: e73e67c719593c1c16139cc6c516d8379f22f182 author: Peter Eisentraut date: Tue, 20 Nov 2018 21:49:01 +0100 Add settings to control SSL/TLS protocol version For example: ssl_min_protocol_version = 'TLSv1.1' ssl_max_protocol_version = 'TLSv1.2' Reviewed-by: Steve Singer Discussion: https://www.postgresql.org/message-id/flat/1822da87-b862-041a-9fc2-d0310c3da173@2ndquadrant.com As mentioned in the commit message, this commit introduces two new GUC parameters: ssl_min_protocol_version, to control the minimal version used as communication protocol. ssl_max_protocol_version, to control the maximum version used as communication protocol. Those can also ... Read More

Feed: AWS Compute Blog. Author: Chris Munns. Serverless application architectures enable you to break large projects into smaller, more manageable services that are highly reusable and independently scalable, secured, and evolved over time. As serverless architectures grow, we have seen common patterns that get reimplemented across companies, teams, and projects, hurting development velocity and leading to wasted effort. We have made it easier to develop new serverless architectures that meet organizational best practices by supporting nested applications in AWS SAM and the AWS Serverless Application Repository.How it works Nested applications build off a concept in AWS CloudFormation called nested stacks ... Read More

Feed: Planet MySQL; Author: MC Brown; Clickhouse is a relatively new analytics and datawarehouse engine that provides for very quick insertion and analysing of data. Like most analytics platforms it’s built on a column-oriented storage basis and unlike many alternatives is completely open source. It’s also exceedingly fast, even on relatively modest platforms.Clickhouse does have some differences from some other environments, for example, data inserted cannot easily be updated, and it supports a number of different storage and table engine formats that are used to store and index the information. So how do we get into that from our MySQL transactional ... Read More

Feed: The Connector by Workato. Author: Ashley Austin; One of my favorite parts of working for Workato is meeting what I call “Workato Champions”: people who preach the power of integration and automation to their organizations. These digitally-minded agents of change are at the core of our relationships with our customers. And they’re not all executives or directors; many of them are everyday employees in sales, marketing, IT, and HR. It’s always inspiring to see people champion workflows that solve real problems, helping them and their colleagues work smarter, not harder. But it can also be incredibly frustrating. Over and ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Bill Schmarzo. The opportunity to watch and coach the University of San Francisco (USF) students during our annual Hackathon with our friends at Good Dataprobably taught me as much as it taught the students. The lessons learned I’ll share here will not only benefit future classes, but my customers.  It also gives me an opportunity to make special mention of one Hackathon team that really delivered the goods! This year’s Hackathon focused on analyzing air traffic delays (a subject area with which I unfortunately consider myself an expert).  We used data ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: David Harris. In 1963 Benoit Mandelbrot published an article called “The Variation of Certain Speculative Prices.”  It is a response to the forming theory that would become Modern Portfolio Theory.  Oversimplified, Mandelbrot’s argument could be summarized as “if this is your theory, then this cannot be your data, and this is your data.”  This issue has haunted models such as Black-Scholes, the CAPM, the APT and Fama-French.  None of them have survived validation tests.  Indeed, a good argument can be made that the test by Fama and MacBeth in 1973 should ... Read More

Feed: R-bloggers. Author: R Views. Today we will continue our work on Fama French factor models, but more as a vehicle to explore some of the awesome stuff happening in the world of tidy models. For new readers who want get familiar with Fama French before diving into this post, see here where we covered importing and wrangling the data, here where we covered rolling models and visualization, my most recent previous post here where we covered managing many models, and if you’re into Shiny, this flexdashboard. Our goal today is to explore k-fold cross-validation via the rsample package, and ... Read More

Feed: MemSQL Blog. Author: Floyd Smith. MemSQL CEO Nikita Shamgunov was featured recently on the Data Engineering Podcast with host Tobias Macey. Tobias drew out Nikita on MemSQL’s origins, our exciting present, and where we’re going in the future. We share a few highlights here, but we also urge you to listen to the full episode. The podcast covered a wide variety of topics. In this blog post, we’ll highlight Nikita’s comments on MemSQL’s origins; setting up and running the MemSQL database; typical use cases; and the future of MemSQL. How MemSQL Started Nikita grew up and was educated in ... Read More