VMware ESXi is the industry-leading hypervisor that is installed directly on a physical server. It is a reliable and secure solution with a tiny hardware footprint. At the same time, ESXi architecture is easy in management, patching, and updating. Recently, Mellanox has released iSER 1.0.0.1, the stable iSER driver build for ESXi. iSER is an iSCSI extension for RDMA that enables the direct data transfer out and into SCSI memory without any intermediate data copies. Here, we study the driver stability and performance to understand how the protocol streamlines ESXi environments.

Virtualization of your work servers is a necessary action, but the problem is when you do that, you basically put all your eggs in one basket. Let’s imagine that your Hyper-V host with several VMs on it requires rebooting. Well, in that case, you won’t be able to boot a specific VM until the host OS is restarted, and all VMs are booted. And there’s no guarantee they will be available after that! Now, that surely doesn’t sound too good. However, luckily there are ways to make this process less painful and more efficient. While configuring Hyper-V host, you’ll have to be able to boot your VMs in a specific order. I gotta admit, even though it took me a while to figure out how to customize this process, I have some results for you. Mind, even if your server OS isn’t prone to failure, it’ll still be wise to configure Hyper-V automatic start action for VMs. One way or another, someday, you’ll have to reboot your server. So, when such a reboot occurs, it would’ve been nice if you didn’t have to boot ever separate VM manually, don’t you think so?

Today, I’ll talk about a thing that any sysadmin running Hyper-V VMs does (or still dreams about) while managing infrastructure resources: hot modifying assigned to VM memory amount. I’ll discuss not only the feature itself but also how it works on different OS and its impact on the environment stability. All of us keep an eye on resource consumption within our environments. If a VM needs extra RAM to have the job done, we provide it with some, right? And, we usually run many VMs on our servers each with own purpose and configuration. That’s, actually, why changing the amount of assigned to a VM memory without rebooting it may come in handy. Also, many guys run some parts of their environments on Windows while having other parts run on something from Linux family. Looks pretty hectic in terms of management, doesn’t it?

Windows Admin Center (WAC) is a locally-deployed, browser-based management tool that provides you with the full control over your Windows Server environment. The nice thing is, it does not push you to Azure or any other cloud, so it works for you even if you do not feel that enthusiastic about public cloud.

In this post, I am going to take a closer look at the impact of read-only routing on SQL Server Availability Groups performance. I measured SQL Server Availability Groups (AG) performance before (https://www.starwindsoftware.com/blog/hyper-v/can-sql-server-failover-cluster-instance-run-s2d-twice-fast-sql-server-availability-groups-storage-spaces-part-1-studying-ag-performance/). And, a guy from Reddit  recommended enabling read-only routing to achieve higher performance (find more about this policy here: https://docs.microsoft.com/en-us/sql/database-engine/availability-groups/windows/configure-read-only-routing-for-an-availability-group-sql-server?view=sql-server-2017). Thanks for your comment, man! I highly appreciate your efforts. This article will shed light on how read-only routing affects SQL Server AG performance.

  Creating of Windows domain has always been a rock on which admins split. There are ones who will vouch for GUI. The others are more prone to PowerShell use. What do I think? Well, PowerShell is a flexible and universal tool, unlike GUI. So, no wonder this article is dedicated to creating and configuring a domain on Windows Server 2016 via PowerShell exclusively. I want to establish whether it will be helpful in the automation of this whole process.

We’ve all heard the expression “time is money” and you can’t put it better when talking about IT. Most businesses’ success and efficiency depends on their IT infrastructure. For real. We all want our applications to run as fast as possible and roll them out in a matter of minutes. Moreover, the more data you have, the worse the consequences are in the event of its loss. So, companies want to get back all their data and get it back as soon as possible in case something happens. That’s called Recovery Point Objective (RPO) and Recovery Time Objective (RTO) and the shorter they are, the better it is for your company. Finally, as your business grows, you want to provision it with the right amount of storage and capacity and in case you need to open another branch office, you want to deploy an IT infrastructure shortly without spending months for building it.

IT infrastructure security is a number one priority, whether it be bare-metal or virtual infrastructure. The matter of safety in a Hyper-V environment, in particular, is one of those things that require attention first and foremost. However, whereas the fundamental aspects of covering the question of protection are widely known, there are always tiny details nobody really pays any attention to. Even experienced IT administrators tend to pass them by. This article takes focus on such issues. Either in a highly virtualized environment or private cloud, every one of them can become crucial. Admittedly, establishing security baselines in the Hyper-V environment is a sink-or-swim scenario. The primary user concern is the host operating system (OS) and network hardware: you simply cannot maintain security on a proper level with only one product active. The safety of the Hyper-V environment requires a complex set of measures, including but not limited to constant monitoring of services and equipment. All your virtual machines (VMs) and resources are dependent on the hypervisor. If someone takes control of it, you can say goodbye to all your data. That is why Hyper-V security is essential. Check out potentially dangerous mistakes listed in this article while setting up and maintaining network hardware, host OS, and your Hyper-V environment so that it won’t be infected with ransomware.

Hyperconvergence has dramatically transformed data center landscape over the past few years. New technologies are being developed, good old ones are being improved… We live in exciting times! And as data centers are becoming more reliable and powerful, it is important to get more out of the hardware in use: nobody likes to leave money on the table! Intel, Mellanox and StarWind have teamed up to develop a Hyper-V highly available cluster where you’ll get awesome performance without compromising ease of manageability of the environment. This article discusses the measurements in brief, showcasing the recent results.