Tag: instance

Feed: Planet MySQL; Author: Mirko Ortensi; MySQL highly available solutions, InnoDB Cluster (it uses InnoDB storage engine and is based on Group Replication plugin) and NDB Cluster (NDB storage engine), offer high scalability and redundant topologies. InnoDB Cluster can be configured with up to 9 replicas, in single primary configuration or multi-primary. NDB Cluster instead, while being a much different solution, offers the chance to have up to 4 data nodes replicated for a single shard of data (or node group) and up to a total number of 144 nodes. Redundancy ensures that multiple copies of data exist and are ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Aileen Scott. Data scientist! The most awaited job for candidates who’ve got the affinity for statistics and mathematics. With data growing at an exponential rate, data science now becomes an appealing career path. Data science is super technical, interesting, and tough to get into. However, making an entrance as a data scientist may not be as challenging as you think. First, know that data is being generated in the blink of an eye. To be precise, according to the “2021 Robert Half Technology Salary Guide” data scientist touts to be one ... Read More

Feed: Planet PostgreSQL. pgBackRest is a well-known powerful backup and restore tool. It offers a lot of possibilities. In this post, we’ll see how to setup a dedicated repository host to backup a PostgreSQL 3-nodes cluster. The repository host will be called backup-srv and the 3 PostgreSQL nodes in Streaming Replication: pg1-srv, pg2-srv, pg3-srv. All the nodes will be running on CentOS 7. If you’re familiar with Vagrant, here’s a simple Vagrantfile to initiate 4 virtual machines using those names: # Vagrantfile Vagrant.configure(2) do |config| config.vm.box = 'centos/7' config.vm.provider 'libvirt' do |lv| lv.cpus = 1 lv.memory = 1024 end nodes ... Read More

Feed: Planet PostgreSQL. Well, we've already discussed isolation and made a digression regarding the low-level data structure. And we've finally reached the most fascinating thing, that is, row versions (tuples).Tuple headerAs already mentioned, several versions of each row can be simultaneously available in the database. And we need to somehow distinguish one version from another one. To this end, each version is labeled with its effective "time" (xmin) and expiration "time" (xmax). Quotation marks denote that a special incrementing counter is used rather than the time itself. And this counter is the transaction identifier.(As usual, in reality this is more ... Read More

Feed: AWS Partner Network (APN) Blog. Author: Yusuf Ali. By Yusuf Ali, Solution Architect & Delivery Lead – FujitsuBy Rob Evans, Application Transformation Product Manager – FujitsuBy Eric Payeur, Director – Head of Application Modernization, Mainframe Migration – FujitsuBy Serge Moro and Addy Dubhashi – AWS In the last two decades, the financial services market has been undergoing significant transformation driven by the competition of new market entrants, customer demand, and regulation. This transformation is powered by new technology, including cloud services. Furthermore, COVID-19 has brought severe disruption to traditional operations and raised the need of accelerated digital engagement and ... Read More

Feed: AWS Public Sector Blog. Author: Elliot Stewart. The COVID-19 pandemic is driving a parallel “infodemic”: the rapid spread of competing and often harmful narratives about the virus. Social media plays a central role in this infodemic, serving as a forum for the spread and evolution of theories and beliefs with origins in broadcast, print, online news, blogs, and other digital arenas. The ability of decision-makers to understand the role of social media in spreading ideas and beliefs is limited by the scale of activity on these platforms, where users produce millions of posts per day. To help navigate this ... Read More

Feed: Planet MySQL; Author: Severalnines; Whenever application security is mentioned, people think of securing applications against some of the most frequent attacks such as injection, broken authentication, sensitive data exposure, and the like. However, while these attacks are prevalent, knowing how to protect your application from them alone will not be sufficient - especially when you’re running MySQL. Today we are going to look at a different side of security - we are going to look into how to properly secure MySQL. As MySQL security is a pretty big thing, treat this post as the start of a series of ... Read More

Feed: What's New. Author: Steve Schwartz. Tableau: As you look back on the polling data you gathered in the lead-up to the election, what is your big-picture takeaway about what your data revealed? Wronski: One thing that we really came to appreciate was the value of having the 50-state Candidate Preference map to visualize our data. We actually feel that we did well in terms of directionally calling the states correctly. We were dead-on in a lot of cases, and the places where we were off, they were oftentimes less than the degree to which other pollsters were off. And ... Read More

Feed: SAS Blogs. Author: Suzanne Morgen. The following is an excerpt from Cautionary Tales in Designed Experiments by David Salsburg. This book is available to download for free from SAS Press. The book aims to explain statistical design of experiments (DOE) to readers with minimal mathematical knowledge and skills. In this excerpt, you will learn about the origin of Thomas Bayes’ Theorem, which is the basis for Bayesian analysis. Source: Wikipedia The Reverend Thomas Bayes (1702–1761) was a dissenting minister of the Anglican Church, which means he did not subscribe to the full body of doctrine espoused by the Church ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Kurt Cagle. Over the years, I've had people ask me how a taxonomy differs from an ontology. The answer (or at least a reasonably simple answer) is that "a taxonomy is a tree shaped ontology". It is worth digging  bit deeper to understand what that means, however: Way back in the early 18th century, a Swedish biologist by the name of Carl Linnaeus began a fairly ambitious project. He wanted to build a way of indexing animals and plants by their phenotypes - the ways that they are alike. His original ... Read More