Disaster Recovery and why hypervisor HA may not be best
Posted by Gary Williams on August 10, 2017
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A lot of the time I see and speak to people asking about DR solutions when what they really want is HA with a few backups so I wanted to use a blog article to go through some of the technical terms used in conjunction with DR.

When people say “I want DR”, I’ll ask them about the sort of disasters they are looking to protect against and most of the time the response is “I want to keep working if my hypervisor crashes”.

Linux VMs restart


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Hyper-V Networking 101. Part 1: NICs and Switches
Posted by Thorsten Windrath on March 22, 2017
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Network cables



There are lots of posts regarding Hyper-V networking. But there doesn’t seem to be a single compiled and up to date guide covering fundamentals and some advanced topics alike. This article aims to fill that gap, without a wall of text but a few easy to understand diagrams, tables, and PowerShell snippets. We will take a look at Hyper-V’s basic networking concept, NIC teaming (Network Interface Card) and different approaches to let VMs (Virtual Machines) talk to specific VLANs or even VLAN trunks.

The first article in the Hyper-V Networking 101 series will cover everything you need to know about virtual switches and NICs. The last post is planned as a real-world example: A way to implement a secure Wi-Fi (and/or wired) guest network on top of a virtual firewall.


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Hyper-Converged Needs to Get Beyond the Hype
Posted by Jon Toigo on January 25, 2016
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It used to be that, when you bought a server with a NIC card and some internal or direct attached storage, it was simply called a server. If it had some tiered storage – different media with different performance characteristics and different capacities – and some intelligence for moving data across “tiers,” we called it an “enterprise server”. If the server and storage kit were clustered, we called it a high availability enterprise server. Over the past year, though, we have gone through a collective terminology refresh.

Today, you cobble together a server with some software-defined storage software, a hypervisor, and some internal or external flash and/or disk and the result is called “hyper-converged infrastructure.” Given the lack of consistency in what people mean when they say “hyper-converged,” we may be talking about any collection of gear and software that a vendor has “pre-integrated” before marking up the kit and selling it for a huge profit. Having recently requested information from so-called hyper-converged infrastructure vendors, I was amazed at some of the inquiries I received from would-be participants.

HCI types


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