Virtual consensus in Delos

The Morning Paper

Virtual consensus in Delos , Balakrishnan et al. If you think of this a bit like mapping memory addresses to data in memory, then another parallel comes to mind: the virtual address space. We propose the novel abstraction of a virtual shared log (or VirtualLog).

Stability requires virtual gardening!


The AI began to consume our data and turned the team into “virtual gardeners”, all the issues that were causing failures were being weeded out, applications pruned, one by one, the landscape turned from a jungle to a well kept garden. The post Stability requires virtual gardening!


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Reinventing virtualization with the AWS Nitro System

All Things Distributed

After years of optimizing traditional virtualization systems to the limit, we knew we had to make a dramatic change in the architecture if we were going to continue to increase performance and security for our customers.

Google Announces the General Availability of A2 Virtual Machines


Recently, Google announced A2 Virtual Machines (VMs)' general availability based on the NVIDIA Ampere A100 Tensor Core GPUs in Compute Engine.

Azure Virtual Machines for SQL Server Usage

SQL Performance

One important choice you will still have to make is what type and size of Azure virtual machine you want to use for your existing SQL Server workload. Microsoft currently has eight main types of virtual machines designed for different types of workloads.

Firecracker: lightweight virtualization for serverless applications

The Morning Paper

Firecracker is the virtual machine monitor (VMM) that powers AWS Lambda and AWS Fargate, and has been used in production at AWS since 2018. General-purpose hypervisors and virtual machine monitors (VMMs) are also quite large, leading to a large trusted compute base (TCB).

Statistical foundations of virtual democracy

The Morning Paper

Statiscal foundations of virtual democracy Kahng et al., The big idea behind virtual democracy is that we learn the voting preferences of each stakeholder, essentially creating an agent which is able to vote in their place, a virtual voter. Then when we need to make a decision we ask those virtual voters to cast their votes (in the form of a preference ranking). ICML’19.

Service virtualization: How this misunderstood tech could save you millions

TechBeacon Testing

Despite the proven benefits of service virtualization for software development, the technology often gets underutilized. App Dev & Testing, Testing, Service Virtualization

Duplicate IP issues with Linux and virtual machine cloning.


When hypervisor management tools make clones of virtual machines, the tools usually make sure to create a unique MAC address for every clone. The post Duplicate IP issues with Linux and virtual machine cloning. cloud cloning linux virtualizationTL;DR – Some modern Linux distributions use a newer method of identification which, when combined with DHCP can result in duplicate IP addresses when cloning VMs, even when the VMs have unique MAC addresses.

AWS vs Azure vs Google Cloud: Pricing Comparison of Virtual Machines


This blog provides you the virtual instances' pricing comparison to help you choose the cheapest one. The post AWS vs Azure vs Google Cloud: Pricing Comparison of Virtual Machines appeared first on Insights on Latest Technologies - Simform Blog. As major cloud providers (AWS, Azure, Google, and IBM) continue to drop the prices of cloud instances.

Why You Need to Build a Virtual Call Center Software?


With the rise in cloud-based software solutions, the market of traditional call centers is also shifting towards a more modernized solution known as virtual call center software. The post Why You Need to Build a Virtual Call Center Software?

AMD EPYC Processors in Azure Virtual Machines

SQL Performance

Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. The key specifications for the Lsv2 series virtual machines are shown in Table 1. Azure Managed Disks are essentially logical disks that are actually virtual hard disks (VHD) that you can use with any Azure VM, regardless of the VM size. The post AMD EPYC Processors in Azure Virtual Machines appeared first on

AWS EC2 Virtualization 2017: Introducing Nitro

Brendan Gregg

Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. It's an exciting development in cloud computing: hardware virtualization is now fast. The rows of this table are virtualization types, and the cells show the type of virtualization and are colored by the expected performance. Virtualized in Hardware**: Hardware support for virtualization, and near bare-metal speeds.

Tungsten.js: UI Framework with Virtual DOM + Mustache Templates

Wayfair Tech

virtual DOMPerformance is top priority here at Wayfair, because improved performance means an improved customer experience. A significant piece of web performance is the time it takes to render, or generate, the markup for a page. Over the last several months we've worked hard to improve the render performance on our. Read more. Open Source Web Performance performance react.js tungsten tungsten.js

Back-to-Basics Weekend Reading - Virtualizing Operating Systems.

All Things Distributed

Back-to-Basics Weekend Reading - Virtualizing Operating Systems. This weekends back-to-basics reading is on operating system virtualization. There are two papers that deserve the "classic" tag as they both form the basis for operating system virtualization that is in production today. Stanfords Disco, the predecessor of VMWare, uses a full hardware virtualization approach, where Cambridges Xen introduced us to paravirtualization. All Things Distributed.

Beam-Up Load Balancing: The Portable Next Generation App Experience


performance ci/cd firewall load balancer it operations network automation virtual appliance cloud data centers application delivery controller hybrid it

The Best Way to Host MySQL on Azure Cloud


Azure Virtual Networks. Azure makes this easy to setup through the use of a Virtual Network (VNET) which can be configured for your MySQL servers. These are typically configured to communicate across a single network, but if you need to connect more than one region, you can create multiple VNETs to communicate through Virtual Network Peering.

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The Best Way to Host MongoDB on DigitalOcean


DigitalOcean specialized in SSD-based virtual machines called Droplets that are broken down into four simple categories. MongoDB is the #3 open source database and the #1 NoSQL database in the world. It’s a cross-platform document-oriented database that uses JSON-like documents with schema, and is leveraged broadly across startup apps up to enterprise-level businesses developing modern apps.

ScaleGrid DBaaS Expands MySQL Hosting Services Through AWS Cloud


While all other DBaaS platforms require you to host through their service, ScaleGrid encourages users to host in the safety of their own accounts so they can leverage advanced security features like AWS Virtual Private Clouds (VPC) to protect their data from the internet, and Security Groups to lock down access to their servers. PALO ALTO, Calif.,

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4 elements of a highly effective continuous testing strategy

TechBeacon Testing

App Dev & Testing, Testing, Agile + DevOps Conference, Special Coverage: Agile + DevOps Virtual, Continuous TestingOften, when organizations plan and implement an effective test automation strategy, they believe that they are implementing continuous testing. They are wrong.

How To Connect To Your MongoDB Deployments Using Robo 3T GUI


For our MongoDB Bring Your Own Cloud (BYOC) AWS deployments that are not open to the internet, this may mean selecting an instance that is allowed to connect to the Security Group and also has VPN connectivity to the Virtual Private Cloud (VPC). Robo 3T (formerly Robomongo) is a popular desktop graphical user interface (GUI) for your MongoDB hosting deployments that allows you to interact with your data through visual indicators instead of a text-based interface.

ScaleGrid Fully Managed Hosting for Redis™ Now Available on Azure


Additionally, organizations can customize their Redis™ persistence and host through their own Azure account which allows them to leverage advanced cloud capabilities like Azure Virtual Networks (VNET), Security Groups, and Reserved Instances to reduce long-term hosting costs up to 60%. PALO ALTO, Calif., October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Hosting on Azure for Redis™ service.

Azure 100

You built a talented QA team. Here's how to keep them

TechBeacon Testing

App Dev & Testing, Testing, StarWEST Conference, Special Coverage: STARWEST Virtual + 2020, CareersAs a New York City public school teacher, I taught general music classes to up to 50 students, each with varying degrees of ability and readiness to learn.

Redis Cloud Gets Easier with Fully Managed Hosting on Azure


Additionally, organizations can customize their Redis persistence and host through their own Azure account which allows them to leverage advanced cloud capabilities like Azure Virtual Networks (VNET), Security Groups, and Reserved Instances to reduce long-term hosting costs up to 60%. PALO ALTO, Calif., October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Redis on Azure service.

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A Dynamic Journey to Performance

Wayfair Tech

Excitement buzzed in the virtual air -- after multiple years of work, we were finally going live! As we ramped up our feature toggle, we were met with words no engineer wants to hear: “Your service isn’t performing fast enough. We need you to toggle off.” Our team quickly pivoted. Read more.

Linux Kernel vs. Memory Fragmentation (Part 1)


Because the Linux kernel supports virtual memory management, physical memory fragmentation is often not an issue. With page tables, unless large pages are used, physically scattered memory is still contiguous in the virtual address space. (External) memory fragmentation is a long-standing Linux kernel programming issue. As the system runs, it assigns various tasks to memory pages.

Implementing Clustering With MuleSoft AnyPoint Runtime Manager


In simple terms, virtual servers composed of multiple nodes and they communicate and share information through a distributed shared memory grid. Learn more about clustering with MuleSoft. What Is Clustering? Clustering is a group of servers or mule runtime which acts as a single unit.

Add a new node into existing SQL Server Always On Availability Groups

SQL Shack

Build three Virtual Servers with Windows Server […]. This is the 5th article in the series of a comprehensive guide to SQL Server Always On Availability Groups.

Control Flow: try-catch or if-else?


Suppose that the signup logic of the virtual Web service 'A' is not allowed to have duplicate nicknames, e-mails, and phones. Introduction. Lately, while working on a new project, I had a chance to think about the proper way to handle control flow.

Moving HPC to the Cloud: A Guide for 2020

High Scalability

Today, HPC is typically a mix of resources, including supercomputing and virtualized and bare metal servers, platforms for management, sharing and integration capabilities, and more.

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A Short on How Zoom Works

High Scalability

Zoom scaled from 20 million to 300 million users virtually over night. What's incredible is from the outside they've shown little in the way of apparent growing pains, though on the inside it's a good bet a lot of craziness is going on.

Transparent Data Encryption for SQL Server Always On Availability Groups

SQL Shack

Build virtual servers using Oracle VirtualBox We configured domain controller, active directory and domain name […]. In this 15th article of SQL Server Always On Availability Groups series, we will cover Transparent Data Encryption (TDE) for AG databases.

How to Create a Sparse File


Virtual machine images are examples of spare files. Sparse files are files with “holes”. File holes do not take up any physical space as the file system does not allocate any disk blocks for a hole until data is written into it. Reading a hole returns a null byte.

Configure Domain Controller and Active Directory for SQL Server Always On Availability Groups

SQL Shack

In the article, A comprehensive guide to SQL Server Always On Availability Groups on Windows Server 2016, we configured three virtual machines with their networking configurations.

Explore SQL Server PolyBase External Tables in SQL Server Always On Availability Groups

SQL Shack

SQL Server PolyBase Introduction It is a new feature from SQL Server 2016 to query the relational and non-relational database using data virtualization techniques.

Fight ageism in QA: 4 skills experienced testers can tout

TechBeacon Testing

We see this in virtually every industry—education, manufacturing, and now DevOps and QA testing. It's a fact of business that younger workers are often cheaper than older ones. App Dev & Testing, Testing, Careers

The best software QA and testing conferences of 2021

TechBeacon Testing

Some went virtual, while others were canceled outright. Software QA and testing conferences scheduled for 2020 were thrown into turmoil amid the coronavirus pandemic. And conference organizers are still trying to figure out what to do about their 2021 events.

Java Performance Tools: Nine Types of Tools You Need to Know!


That’s true for virtually any programming language and platform. Something to test Java's performance. Managing an application’s performance, and specifically keeping it in good condition, is one of the hardest challenges in software development. java performance apm tracing rum java profiler jvm performance web requests

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A Few Tips for Improving the Performance of Your Web Applications


Virtual Tables. If you're using MySQL or any other SQL-based database, using virtual tables is the best thing that you can do. In that case, you can create virtual tables in your SQL databases, which are sometimes referred as views, and keep all the columns that you want to retrieve from all four tables. In this post, we will mostly be talking about a few things that we should keep in mind while writing web APIs to get the best possible performance out of them.

Rendering large lists with react-window

Addy Osmani

If you use React and need to display large lists of data efficiently , you may be familiar with react-virtualized. It's a windowing library by Brian Vaughn that renders only the items currently visible in a list (within a scrolling "viewport"). This means you don't need to pay the cost of thousands of rows of data being rendered at once

Bring Your Own Cloud (BYOC) vs. Dedicated Hosting at ScaleGrid


A vast majority of the features are the same, outside of these advanced features available through the BYOC model: Virtual Private Clouds / Virtual Networks. Where you decide to host your cloud databases is a huge decision.

Cloud 203

Add or remove a node from SQL Server Always On Availability Groups using T-SQL scripts

SQL Shack

Introduction In this series of articles, we configured the SQL Server Always On Availability Group from the beginning of building virtual machines. This is the 7th article in the series of SQL Server Always on Availability Groups.

Measuring Performance of Your Methods Using JMH in Java


JMH is developed by the same people who implement the Java virtual machine (JVM) so they know the internals and how Java makes optimizations at run time. Measure Java performance!

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