For more than three decades, researchers have used a particular simulation method for molecular dynamics called Ab initio molecular dynamics, or AIMD, which has proven itself to be the method most accurate for analyzing how atoms and molecules move and interact over a fixed time period. …
Gordon Bell Prize Winners Leverage Machine Learning For Molecular Dynamics was written by Jeffrey Burt at The Next Platform.
Docker Captains are select members of the community that are both experts in their field and are passionate about sharing their Docker knowledge with others. Today, we’re introducing “Docker Captains Take 5”, a regular blog series where we get a closer look at the Docker experts who share their knowledge online and offline around the world. A different Captain will be featured each time and we will ask them the same broad set of questions ranging from what their best Docker tip is to whether they prefer cats or dogs (personally, we like whales and turtles over here). To kick us off we’re interviewing Ajeet Singh Raina who has been a Docker Captain since 2016 and is a DevRel Manager at Redis Labs. He is based in Bangalore, India.
It was the year 2013 when I watched Solomon Hykes for the first time presenting “The Future of Linux Containers” at PyCon in Santa Clara. This video inspired me to write my first blog post on Docker and the rest is history.
The docker buildx CLI is one of my favorite commands. It allows you to Continue reading
Each week Network Break runs vendor press releases through our patented ML algorithms to strip out the marketing & buzzwords. It doesn't leave us much to work with, but we do our best. Today's episode covers Apstra's IBN support for the SONiC NOS, IBM's purchase of APM newcomer Instana, VMware's furthering of its networking ambitions, a startup building 5G chips for the edge, and more.
The post Network Break 311: Apstra Gets Loud About SONiC; VMware Sinks More Hooks Into Networking appeared first on Packet Pushers.
Great heights: As his classes move online, Russian student Alexei Dudoladov has to climb a birch tree to get Internet access, Reuters reports. The student at the Omsk Institute of Water Transport, which is nearly 1,400 miles east of Moscow, says his home Internet service is not strong enough to connect to online classes. “I need to go into the forest 300 meters from the village and climb a birch tree that is eight-meters high … and I get on Zoom to speak to professors and prove that I am not skipping class for no reason.”
Even greater heights: Meanwhile, the Ector County Independent School District in Odessa, Texas, is hoping that the new SpaceX satellite Internet service will help give students and teachers better Internet access, Education Dive says. The district is the first in the U.S. to work with SpaceX’s Starlink Internet service. A pilot project in early 2021 will include 45 families with students or teachers in the district.
Cybersecurity boss fired: U.S. President Donald Trump, who continues to insist he was the victim of massive nationwide voting fraud in his recent election loss to Joe Biden, has fired Christopher Krebs, who led the federal Continue reading
Many network engineers, myself included, sometimes feel like they don’t belong and don’t deserve to be here. Here are a few tips to combat the impostor syndrome. Sometimes, do you feel like an impostor? This is quite common in IT: you feel like an impostor. Even when you’ve got THE dream job, or when you’ve earned this recognition, or when you’ve passed that famous certification… You can’t get rid of the feeling that it’s just smoke, that you must have fooled everyone and that at any moment you will be…
The post How to Overcome the Impostor Syndrome as Network Engineer appeared first on AboutNetworks.net.
In this short post I'll introduce you to lesser known type of Ansible loop: "until" loop. This loop is used for retrying task until certain condition is met.
To use this loop in task you essentially need to add 3 arguments to your task arguments:
until - condition that must be met for loop to stop. That is Ansible will continue executing the task until expression used here evaluates to true.
retry - specifies how many times we want to run the task before Ansible gives up.
delay - delay, in seconds, between retries.
As an example, below task will keep sending GET request to specified URL until the "status" key in response is equal to "READY". We ask Ansible to make 10 attempts in total with delay of 1 second between each attempt. If after final attempt condition in until is still not met task is marked as failed.
- name: Wait until web Continue readingA while ago (eons before AWS introduced Gateway Load Balancer) I discussed the intricacies of AWS and Azure networking with a very smart engineer working for a security appliance vendor, and he said something along the lines of “it shows these things were designed by software developers – they have no idea how networks should work.”
In reality, at least some aspects of public cloud networking come closer to the original ideas of how IP and data-link layers should fit together than today’s flat earth theories, so he probably wanted to say “they make it so hard for me to insert my virtual appliance into their network.”
A while ago (eons before AWS introduced Gateway Load Balancer) I discussed the intricacies of AWS and Azure networking with a very smart engineer working for a security appliance vendor, and he said something along the lines of “it shows these things were designed by software developers – they have no idea how networks should work.”
In reality, at least some aspects of public cloud networking come closer to the original ideas of how IP and data-link layers should fit together than today’s flat earth theories, so he probably wanted to say “they make it so hard for me to insert my virtual appliance into their network.”
Elle: inferring isolation anomalies from experimental observations, Kingsbury & Alvaro, VLDB’20
Is there anything more terrifying, and at the same time more useful, to a database vendor than Kyle Kingsbury’s Jepsen? As the abstract to today’s paper choice wryly puts it, “experience shows that many databases do not provide the isolation guarantees they claim.” Jepsen captures execution histories, and then examines them for evidence of isolation anomalies. General linearizability and serializability checking are NP-complete problems due to extreme state-space explosion with increasing concurrency, and Jepsen’s main checker, Knossos, taps out on the order of hundreds of transactions.
Databases are in for an ‘Ell(e) of a hard time with the new checker in the Jepsen family though, Elle. From the README:
Like a clever lawyer, Elle looks for a sequence of events in a story which couldn’t possibly have happened in that order, and uses that inference to prove the story can’t be consistent.
The paper describes how Elle works behind the scenes, and gives us a taste of Elle in action. Elle is able to check histories of hundreds of thousands of transactions in just tens of seconds. Which means whole new levels of stress for Continue reading
Tom Hollingsworth wrote another must-read blog post in which he explained what one should do before asking for help:
If someone comes to me and says, “I tried this and it failed and I got this message. I looked it up and the response didn’t make sense. Can you tell me why that is?” I rejoice. That person has done the legwork and narrowed the question down to the key piece they need to know.
In other words (again his), do your homework first and then ask relevant questions.
Tom Hollingsworth wrote another must-read blog post in which he explained what one should do before asking for help:
If someone comes to me and says, “I tried this and it failed and I got this message. I looked it up and the response didn’t make sense. Can you tell me why that is?” I rejoice. That person has done the legwork and narrowed the question down to the key piece they need to know.
In other words (again his), do your homework first and then ask relevant questions.
Howdy Folks! This post covers the process of installing the PostgreSQL database on Linux and a few of the common details around configuration and operation. Software Versions Used in this Post PostgreSQL - 13.1 Ubuntu - 20.04 Centos - 8.2.2004 Installation Ubuntu This is almost a...continue reading