Azure Centric

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What Is Hyper-V Replica?

Hyper-V Replica is new functionality added to the Hyper-V Role in Windows Server 2012.  Hyper-V Replica enables organizations to implement an affordable Business Continuity and Disaster Recovery (BCDR) solution for virtualized workloads. This allows virtual machines running at a primary site to be efficiently replicated to secondary location (Replica site) across a WAN link.  Purpose/Benefits Hyper-V Replica provides a storage-agnostic and workload-agnostic solution that replicates efficiently, periodically, and asynchronously over...

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How does a storage migration of a running virtual machine in Windows Server 2012 (both through Hyper-V manager and through PowerShell) actually work?

The process followed by Hyper-V internally to perform a storage migration is actually quite simple to explain and is as follows: Step 1: Start with a virtual machine that is reading and writing to a virtual hard disk file (.VHDX in the diagram, but storage migration is supported for both .VHDX and .VHD files). Step 2: After the user selects to perform a storage migration, immediately create a new virtual...

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What is the ‘Replication State’ and what are the values?

Replication state shows the current state of the replicating VM. It indicates whether the VM is being replicated, whether initial replication is pending etc. ReplicationState can be queried from: UI – As seen in the above picture PowerShell – Using the Measure-VMReplication cmdlet. WMI – From Msvm_ComputerSystemclass where      ReplicationState is a property The table below captures the states as seen in WMI, UI and PowerShell. WMI UI PowerShell Notes 0...

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Storage and Continuous Availability Enhancements in Windows Server 2012

Windows Server 2012 will provide a continuum of availability options to protect against a wide range of failure modes in different tiers – storage, network, and compute. These options will enable higher levels of availability and cost-effectiveness, as well as easier deployment for all customers – from small business to mid-market to enterprises – and across single servers, multiple servers, and multi-site cloud environments. Windows Server 2012delivers on continuous availability...

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Why is the “Hyper-V Replica Broker” required?

Hyper-V Replica requires the Failover Clustering role Hyper-V Replica Broker to be configured if either the primary or replica Hyper-V server is part of a cluster. This post builds on top of the guide and explains *why* the broker is required and captures its high level behavior. The following example will be used through the rest of the article: Cluster-P – Failover Cluster      in city 1 P1, P2, P3...

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How to Create a Cluster in a Restrictive Active Directory Environment

In Windows Server 2012 there have been several enhancements to how Windows Server Failover Clusters integrate with the Active Directory.  In this post we going to discuss some of the changes to help enable creating Failover Clusters in restrictive Active Directory environments where permissions to create computer objects is delegated to specific organizational units (OU). In Windows Server 2008 R2, Failover Clustering created computer objects in the Active Directory under the default Computers...

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How SCVMM 2012 manage storage

The key piece within the new storage architecture for SCVMM 2012 is the Storage Service.  This service is part of SCVMM 2012 and will not be available separately.  The storage service provides the communication capabilities when talking to the storage subsystems through the SMI-S providers.  SMI-S providers are provided by the storage vendor.  This model insures that the SAN provider tools still work and that SCVMM 2012 does not conflict...

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What is a Cloud for IT Pro?

When talking to IT pros about the cloud and you’ll hear things like: “What is the cloud? Is it just a set of fancy catchphrases that’s kind of lacking technical backing?” or “I see these public cloud offerings as a way for many teams and organizations to kind of go around IT.” These come with clear angst with questions like: “How does it impact my job? How does it impact...