Author Archives: Romain Serre

Romain Serre works in Lyon as a Senior Consultant. He is focused on Microsoft Technology, especially on Hyper-V, System Center, Storage, networking and Cloud OS technology as Microsoft Azure or Azure Stack. He is a MVP and he is certified Microsoft Certified Solution Expert (MCSE Server Infrastructure & Private Cloud), on Hyper-V and on Microsoft Azure (Implementing a Microsoft Azure Solution).

Create a Hub-and-Spoke topology with Azure Virtual Network Peering

Currently I’m working on AZ-102 certification and I wanted to share with you a small lab I created to try Azure virtual network and especially remote gateway. To create a Hub-and-Spoke topology, you need that each spoke virtual network communicates through the hub virtual network. To implement this kind of solution, you need several virtual networks and peering. I would ...

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S2D Real case: detect a lack of cache

Last week I worked for a customer who went through a performance issue on a S2D cluster. The customer’s infrastructure is composed of one compute cluster (Hyper-V) and one 4-node S2D cluster. First, I checked if it was related to the network and then if it’s a hardware failure that produces this performance drop. Then I ran the script watch-cluster.ps1 ...

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Getting started with Azure File Sync

Azure File Sync is a Microsoft feature released in July 2018. It enables to synchronize multiple On-Premise file servers with Azure. In other words, we can replace DFS-R for branch office. Azure File Sync brings also a tiering feature that enables to cache in On-Prem servers the most used files (based on the access data) and to keep in Azure ...

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Storage Spaces Direct: performance tests between 2-Way Mirroring and Nested Resiliency

Microsoft has released Windows Server 2019 with a new resiliency mode called nested resiliency. This mode enables to handle two failures in a two-node S2D cluster. Nested Resiliency comes in two flavors: nested two-way mirroring and nested mirror-accelerated parity. I’m certain that two-way mirroring is faster than nested mirror-accelerated parity but the first one provides only 25% of usable capacity ...

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Support two failures in 2-node S2D cluster with nested resiliency

Microsoft just released Windows Server 2019 with a lot of improvement for Storage Spaces Direct. One of these improvements is the nested resiliency that is specific for 2-node S2D cluster. Thanks to this feature, a 2-node S2D cluster can now support two failures, at the cost of storage dedicated for resiliency. Nested Resiliency comes in two flavors: Nested two-Way mirroring: ...

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Prepare a high-speed storage repository for backup with Qnap

Most of my customers try to backup their infrastructure at night to avoid impacting the user workloads. Sometimes there are so much data that the night is not enough to backup the whole infrastructure. Usually customers have a decent production infrastructure in term of speed and the bottleneck is the storage repository. For this kind of storage, we prefer to ...

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