MENU
Manage VM placement in Hyper-V cluster with VMM
Posted by Romain Serre on September 23, 2016
No ratings yet.

The placement of the virtual machines in a Hyper-V cluster is an important step to ensure performance and high availability. To make a highly available application, usually a cluster is deployed spread across two or more virtual machines. In case of a Hyper-V node is crashing, the application must keep working.

But the VM placement concerns also its storage and its network. Let’s think about a storage solution where you have several LUNs (or Storage Spaces) according to a service level. Maybe you have a LUN with HDD in RAID 6 and another in RAID 1 with SSD. You don’t want that the VM which requires intensive IO was placed on HDD LUN.

Storage Classification in Virtual Machine Manager

(more…)

Please rate this

Don’t Fear but Respect Redirected IO with Shared VHDX
Posted by Didier Van Hoye on August 25, 2016
5/5 (2)

Introduction

When we got Shared VHDX in Windows Server 2012 R2 we were quite pleased as it opened up the road to guest clustering (Failover clustering in virtual machines) without needing to break through the virtualization layer with iSCSI or virtual Fibre Channel (vFC).

First of all, you need to be aware of the limits of using a shared VHDX in Windows Server 2012 R2.

  1. You cannot perform storage live migration
  2. You cannot resize the VHDX online
  3. You cannot do host based backups (i.e. you need to do in guest backups)
  4. No support for checkpoints
  5. No support for Hyper-V Replica

If you cannot live with these, that’s a good indicator this is not for you. But if you can, you should also take care of the potential redirected IO impact that can and will occur. This doesn’t mean it won’t work for you, but you need to know about it, design and build for it and test it realistically for your real life workloads.

active guest cluster node is running on the Hyper-V host

(more…)

Please rate this

Windows 2016 Makes a 100% In Box High Performance VDI Solution a Realistic Option
Posted by Didier Van Hoye on June 27, 2016
5/5 (2)

1. Introduction

With Windows Server 2016 we have gained some very welcome capabilities to do cost effective VDI deployments using all in box technologies. The main areas of improvement are in storage, RemoteFX and with Discrete Device Assignment for hardware pass-through to the VM. Let’s take a look at what’s possible now and think out loud on what solutions are possible as well as their benefits and drawbacks.

performance
(more…)

Please rate this

NUMA and Cluster-on-die
Posted by Askar Kopbayev on May 27, 2016
4.5/5 (2)

What is NUMA?

NUMA stands for Non Unified Memory Access and Nehalem was the first generation of Intel CPUs where NUMA was presented. However, the first commercial implementation of NUMA goes back to 1985, developed in Honeywell Information Systems Italy XPS-100 by Dan Gielan.

Unified Memory Access topology

(more…)

Please rate this

Storage Replica: “Shared Nothing” Hyper-V Guest VM Cluster
Posted by Anton Kolomyeytsev on October 30, 2014
5/5 (2)

This post is about Microsoft Storage Replica, a new solution introduced by Microsoft in Windows Server 2016. Basically, it enables replication between two servers, clusters or inside a cluster, also being capable of copying data between volumes on the same server. Storage Replica is often utilized for Disaster Recovery, allowing the user to replicate data to a remote site, thus being able to recover from complete physical failure on the main location. The post is dedicated to building a “shared nothing” cluster. It is an experimental part of a series and features a “Shared Nothing” Hyper-V guest VM cluster. As always, there is a detailed instruction as to how to create the subject setup and there are results for everyone to check.

storage replication

(more…)

Please rate this

Storage Replica: “Shared Nothing” Hyper-V HA VM Cluster
Posted by Anton Kolomyeytsev on October 29, 2014
4.67/5 (3)

This post is dedicated to the new solution from Microsoft – the Microsoft Storage Replica. It is a practical part of a series of posts about this technology and features a “Shared Nothing” Hyper-V HA VM Cluster in practice. Microsoft Storage Replica is designed to perform replication between various media: servers, clusters, volumes inside a server, etc. It’s typical usage scenario is Disaster Recovery, which is essential for data protection in case anything happens to the main location. Critical data is replicated to a remote site, often located hundreds and thousands of miles away for better data safety. The experiment is performed by StarWind engineers, so the post contains detailed instructions and a comprehensive conclusion.

storage replication

(more…)

Please rate this