Clustering

Technical articles from Microsoft’s clustering, high availability and network load balancing blogs

Surviving the Digital Heatwave: Lessons Learned from Singapore’s Datacenter Meltdown

Today, we’re unpacking a real-world tech drama that unfolded in Singapore, offering a stark reminder about the vital role of Disaster Recovery (DR) planning and the often overlooked, yet crucial element of regular testing. In the heart of Singapore’s digital infrastructure, a datacenter critical to the operations of DBS and Citibank began to overheat. This […]

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Migrate an existing cluster to Network ATC

Since Azure Stack HCI 21H2, customers have used Network ATC to: Reduce host networking deployment time, complexity, and errors Deploy the latest Microsoft validated and supported best practices Ensure configuration consistency across the cluster Eliminate configuration drift Network ATC has led to HUGE reductions in customer support cases which means increased uptime for your business applications and less headaches for you! But what if you

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Cross-site scripting (XSS) attacks

Today, we’re diving into the world of cross-site scripting (XSS) attacks, breaking them down into three categories: Reflected XSS, Stored XSS, and DOM XSS. Let’s explore these digital threats and learn how they can impact everyday users like you and me. Reflected XSS – The Click-Trap:Imagine you receive a seemingly innocent link through email, chat,

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Public and private AKS clusters demystified

Introduction  Azure Kubernetes Service (AKS) is the managed kubernetes service in Azure. It has two main components: worker nodes and control plane.The worker nodes are the VMs where customer applications will be deployed into.The control plane is the component that manages the applications and the worker nodes.A Kubernetes operator like a user, devops team or

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New Cluster-Wide Control For Virtual Machine Live Migrations In Windows Server and Azure Stack HCI

Applies to:  Windows Server 2022, Azure Stack HCI, version 21H2 and later versions of both  Overview:  There is a new enhancement in the ability to manage the number of parallel live migrations within a cluster, making it easier to change and ensuring consistency.  Previously, changing it required setting it on each node of the cluster,

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How to cluster SAP ASCS/SCS with SIOS DataKeeper on VMware ESXi Servers

This article describes the steps you take to prepare the VMware infrastructure for installing and configuring a high-availability SAP ASCS/SCS instance on a Windows failover cluster by using SIOS DataKeeper as the replicated cluster storage. Create the ASCS VMs For SAP ASCS / SCS cluster, deploy two VMs on different ESXi Servers. Based on your

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How to use Azure Site Recovery (ASR) to replicate a Windows Server Failover Cluster (WSFC) that uses SIOS DataKeeper for cluster storage

Intro So you have built a SQL Server Failover Cluster Instance (FCI), or maybe an SAP ASCS/ERS cluster in Azure. Each node of the cluster resides in a different Availability Zone (AZ), or maybe you have strict latency requirements and are using Placement Proximity Groups (PPG) and your nodes all reside in the same Availability

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How To Linux: A Windows Administrator’s Guide to Linux for the Newbie

Well, it’s long overdue that I left the comfort of my Windows GUI and ventured into the world of Linux. Mind you I have dabbled a very little bit over the years, watched some training videos about 18 years ago, and even installed Ubuntu on an old laptop at that time. I never ventured far

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Performance of Azure Shared Disk with Zone Redundant Storage (ZRS)

On September 9th, 2021, Microsoft announced the general availability of Zone-Redundant Storage (ZRS) for Azure Disk Storage, including Azure Shared Disk. What makes this interesting is that you can now build shared storage based failover cluster instances that span Availability Zones (AZ).  With cluster nodes residing in different AZs, users can now qualify for the

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