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Volodymyr Perishko
Volodymyr Perishko
StarWind Storage and Virtualization Engineer. Volodymyr specializes in solution architecture and data protection. With a technical background in applied physics, he provides unique analytical leadership in building resilient IT infrastructure. Volodymyr delivers expert guidance on optimizing virtualized environments, disaster recovery, and enterprise-scale storage systems.
Volodymyr Perishko
  • Volodymyr Perishko
  • October 12, 2024

Testing iSER on ESXi

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.
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Volodymyr Perishko
  • Volodymyr Perishko
  • September 17, 2024

Hot Adding / Removing RAM in Hyper-V: Field Notes

Explore how Hyper-V 2022 supports live memory changes and what scenarios actually benefit from hot-add and hot-remove options.
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Volodymyr Perishko
  • Volodymyr Perishko
  • August 29, 2024

Creating a Domain on Windows Server 2022 via PowerShell

Learn how to create a fresh AD domain with nothing but PowerShell. Ideal for scripting your lab or production setup quickly.
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Volodymyr Perishko
  • Volodymyr Perishko
  • August 2, 2024

StarWind has set hyperconvergence performance record. Let’s get behind the scenes

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.
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Volodymyr Perishko
  • Volodymyr Perishko
  • August 1, 2024

Installing vSphere 8.0 Update 3 Without Breaking Stuff

Avoid the usual pitfalls when upgrading to vSphere 8 U3. This guide walks through every key step, from backups to post-checks.
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Volodymyr Perishko
  • Volodymyr Perishko
  • July 20, 2024

Resetting the RDS 120-Day Grace Period on Windows Server 2022

Extend your RDS trial with a quick PowerShell trick. Ideal for headless installations where the GUI isn’t an option.
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Volodymyr Perishko
  • Volodymyr Perishko
  • July 16, 2024

Can SQL Server Failover Cluster Instance run twice as fast as SQL Server Basic Availability Groups in 2-node cluster? Part 1: Studying BAG performance

Some time ago, while looking through what SQL server Basic Availability Groups (BAG) can do, I found an awesome article by Pieter Vanhove: https://blogs.technet.microsoft.com/msftpietervanhove/2017/03/14/top-5-questions-about-basic-availability-groups/. There was nothing about performance, though, so I thought: “Hey, why not write an article about BAG performance?” Later, I realized that you need to compare this performance to something else, right? So, I decided to add SQL Server Failover Cluster Instance (FCI) performance measurements. Maybe, I’ll add some SQL Server Availability Groups (AG) measurements at the end; but, let’s see first whether SQL Server FCI can run twice as fast as SQL Server BAG. In this study, I measured BAG performance alone. Now, as we know the scope of the article, let’s move on!
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Volodymyr Perishko
  • Volodymyr Perishko
  • July 13, 2024

Can SQL Server Failover Cluster Instance run twice as fast as SQL Server Basic Availability Groups in 2-node cluster? Part 3: Comparison time!

In this article, I’d like to compare results of the previous two and find out whether SQL Failover Cluster Instance (FCI) can provide you two times higher performance than SQL Server Basic Availability Groups (BAG).
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Volodymyr Perishko
  • Volodymyr Perishko
  • June 27, 2024

How is NVMe-oF Doing? Part 4: “Who’s the fastest hand in the West”?

There was a race to bring NVMe-oF to Windows some time ago. Many tried, but I know that only StarWind and Chelsio succeeded so far. Now, it’s time to see who won this race! It is the fourth part of my NVMe-oF Initiators’ performance study. Before, I tested NVMe-oF initiators developed by Linux, Chelsio and StarWind. Here, the battle ends: which NVMe-oF initiator delivers the highest performance and which one Windows admins should use
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