Educational Episodes: Hyperconverged Infrastructure (HCI)

With the new Azure portal launched some months ago now, Microsoft is trying to move all management console in this new portal, and it’s the case with Microsoft Intune. To manage your Intune subscription now, you need to pass through the Azure Portal. To remember, Intune is a service to manage the mobility of your IT environment (mobile phone, laptop, etc.). I’ll now explain to you how to start with this new interface.

Migrating your VMs from one hypervisor to another may be a bit of a challenge if you don’t have some decent virtual machine converter at hand. Different hypervisors have their own proprietary VM formats: VMDK, VHD and VHDX, QCOW, you name it. The problem is that one VM format can be not supported on other platforms. In this case, a V2V converter is a must-have. Now, the question arises: which converter should I choose?

During its lifetime, any system reaches a point when it needs to be upgraded, either in terms of hardware or software. Today, I will talk about such changes, in particular, about upgrading Windows Failover Cluster nodes from Windows Server 2012 R2 to Windows Server 2016 with no production interruption. Thanks to Microsoft, we do have a Cluster Rolling Upgrade procedure at our fingertips, and I am going to get through it and confirm it works for virtualized disks as cluster shared volumes in Windows Failover Cluster. This procedure assumes rebuilding nodes with clean OS deployment one by one, while the production keeps running from the other cluster node.

Nowadays, many VMware vSphere administrators manage their virtual infrastructures with VMware vCenter Server Appliance 6.5 (vCSA). This solution currently is a full-fledged alternative to the VMware vCenter for Windows which becomes a thing of the past. For ones who use vCSA not that long, this post provides several procedures which simplify solutions’ daily use. Let’s have a look at how they may come in handy.

Nowadays, every company is doing its best to protect its data, which is pretty much its most valuable asset. As you know, data is vulnerable to unauthorized access and that’s when Microsoft BitLocker saves the day. BitLocker is the encryption technology from Microsoft, which makes possible to encrypt the Logical Volume on the transparent blade-based level (not physical disk). In this article, we will see how to encrypt Cluster Shared Volume (CSV) using Microsoft BitLocker to protect your data against unauthorized access.

In this article, we will discuss the split brain issue, and different approaches to prevent it from happening. The situation when communication loss between the cluster nodes is caused by network connection problems is called network partition, which can lead to split brain. According to Wikipedia, split brain is a computer term, based on an analogy with the medical split-brain syndrome. It can be a real horror for a system administrator to handle the consequences of a split brain.

Using the Azure Backup features for your on-premises platform is a great way to start introducing your organization into cloud services. So, if you haven’t explored the service yet, this is a good option since it should not be disruptive with your current backup process or any critical service you are providing. In this article, we’ll review a simple step-by-step process to set a System State backup of one of your on-premises machines to Microsoft Azure.

In the previous article, I’ve described 3 scenarios for testing NVMe-oF performance and skimmed through their hardware and software configuration. Again, what I wanna do, is measure how virtualization influences the NVMe-oF performance (maybe, it doesn’t at all). For this, I’m gonna examine how NVMe-oF performs on a bare metal configuration, and on an infrastructure with Hyper-V and ESXi deployed. In each case, I’ll also evaluate the performance of iSER transport using LIO and SPDK iSCSI. Now that you have the overall understanding of the project, it’s time to move on to configuring our testing environment.

There’s a common opinion that the performance in general and IOPS-intensive performance like NVMe over Fabrics is usually lower in virtualized environments due to the hypervisor overhead. Therefore, I’ve decided to run a series of tests to prove or knock down this belief. For this purpose, I’ll have three scenarios for measuring the performance of NVMe over Fabrics in different infrastructures: fist – on a bare metal configuration, second – with Microsoft Hyper-V deployed on the client server, and finally, with ESXi 6.5.