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  • Blog Post: Error 0x80090303 when enabling replication

    When trying to enable replication on one of my VMs in my lab setup, I encountered the following error – Hyper-V failed to authenticate the Replica server <server name> using Kerberos authentication. Error: The specified target is unknown or unreachable (0x80090303). Needless to say, I was able...
  • Blog Post: Hyper-V Replica & Proxy Servers on primary site

    I was tinkering around with my lab setup which consists of a domain, proxy server, primary and replica servers. There are some gotchas when it comes to Hyper-V Replica and proxy servers and I realized that we did not have any posts around this. So here goes. If the primary server is behind a proxy server...
  • Blog Post: Hyper-V Replica Capacity Planner

    Customers have frequently asked us for capacity planning guidance before deploying Hyper-V Replica – e.g.: “How much network bandwidth is required between the primary and replica site”, “How much storage is required on the primary and replica site”, “What is the storage impact by enabling multiple recovery...
  • Blog Post: Hyper-V Replica Runbooks

    System Center 2012 Orchestrator provides a powerful workflow management solution which allows IT administrators to automate different tasks exposed by the platform. At the heart of the Orchestrator is a set of Runbooks which outline the sequence of activities for a given task. A number of resources are...
  • Blog Post: Hyper-V Replica Kerberos Error

    David is one of our Premier Field Engineers and he approached us with an interesting problem where the customer was encountering a Kerberos error when trying to create a replication relationship. On first glance, the setup looked very straight forward and all our standard debugging steps did not reveal...
  • Blog Post: Hyper-V Replica–Certificate Based Authentication in Windows Server 2012

    This post discusses a subtle change in the certificate workflow for Hyper-V Replica in Windows Server 2012 Release Candidate build and beyond. Note : The pre-requisites certificate based authentication remains unchanged (as seen in an earlier post “ Hyper-V Replica - Prerequisites for...
  • Blog Post: Network Recommendations for a Hyper-V Cluster in Windows Server 2012

    We recently published a TechNet document http://technet.microsoft.com/library/dn550728.aspx which provides guidance on configuring your network for a Hyper-V Cluster in Windows Server 2012. A snip of the summary from the document: Windows Server 2012 supports the concept of converged networking, where...
  • Blog Post: Measuring Replication Health in a cluster

    As part of running a mini-scale run in my lab, I had to frequently monitor the replication health and also note down the replication statistics. The statistics is available by by right clicking on the VM (in the Hyper-V Manager or Failover Cluster Manager) and choosing the Replication submenu and clicking...
  • Blog Post: Upgrading to Windows Server 2012 R2 with Hyper-V Replica

    The TechNet article http://technet.microsoft.com/en-us/library/dn486799.aspx provides detailed guidance on migrating Hyper-V VMs from a Windows Server 2012 deployment to a Windows Server 2012 R2 deployment. http://technet.microsoft.com/en-us/library/dn486792.aspx calls out the various VM migration...
  • Blog Post: What’s new in Hyper-V Replica in Windows Server 2012 R2

    18th October 2013 marked the General Availability of Windows Server 2012 R2. The teams have accomplished an amazing set of features in this short release cycle and Brad’s post @ http://blogs.technet.com/b/in_the_cloud/archive/2013/10/18/today-is-the-ga-for-the-cloud-os.aspx captures the investments...
  • Blog Post: Replica Clusters behind a NAT

    When a Hyper-V Replica Broker is configured in your DR site to accept replication traffic, Hyper-V along with Failover Clustering intelligently percolates these settings to all the nodes of the clusters. A network listener is started in each node of the cluster on the configured port.   While this...
  • Blog Post: Hyper-V Replica BPA Rules

    A frequent question from our customers is on whether there are standard “best practices” when deploying Hyper-V Replica (or any Windows Server role for that matter). These questions come in many avatars - Does the Product Group have any configuration gotchas based on internal testing, is my server properly...
  • Blog Post: Hyper-V Replica Certificate Based Authentication - makecert

    We have had a number of queries on how to enable replication using certificates created from makecert. Though the Understanding and Troubleshooting guide for Hyper-V Replica discusses this aspect, I am posting a separate article on this. The below steps are applicable for a simple lab deployment consisting...
  • Blog Post: Multi-tenant disaster recover solution using Windows Server 2012

    Windows Server 2012 introduces fundamental improvements that make it a cloud-ready operating system. The capabilities provide a flexible and scalable solution which opens up a wide range of opportunities for hosting providers to build new cloud services. This blog post is co-authored by Uma Mahesh...
  • Blog Post: Interpreting Replication Health - Part 2

    Continuing from where we left off the last time … Q1: The Replication Health pane has loads of information, how do I interpret these attributes? I thought you would never ask On both the Primary and Replica VM, the following attributes are displayed...
  • Blog Post: Interpreting Replication Health – Part 1

    In Windows Server 2012 Release Candidate, Hyper-V administrators can monitor the ‘health’ of the replicating VMs using the Replication Health attribute . This property allows administrators to answer common questions such as: When did the primary and replica VMs last synchronize...
  • Blog Post: TechEd North America 2012

    Posting this on behalf of Jeff Woolsey who delivered an amazing demo in the Day 1 Keynote address by Satya Nadella. The video is available here and the transcript for the keynote address is available here .   Some key takeaways from Jeff's presentation: 64 virtual processors in a VM 985,000 IOPs...
  • Blog Post: Inject IP address into the VM during failover

    Hyper-V Replica reduces the Recovery Time Objective (RTO) providing the ability to configure the static IP address of the Replica VM before it is failed over. This IP address setting is injected into the failed over VM. This post written by Vinod Atal who is one of the developers in the Hyper-V team...
  • Blog Post: Enable replication using certificate based authentication - in PowerShell

    Update in July 2012: This post is applicable only if you on Windows Server "8" Beta. For Windows Server 2012 RC and later, refer to the updated blog post @ http://blogs.technet.com/b/virtualization/archive/2012/07/16/hyper-v-replica-certificate-based-authentication-in-windows-server-2012-rc.aspx ...
  • Blog Post: Configure your Replica server to receive replication traffic from specific primary server(s)

    Note: Update on 8th July 2012: This cmdlets and UI used in this article is applicable only for Windows Server "8" Beta. For Windows Server 2012 RC and beyond, see the updated post @ http://blogs.technet.com/b/virtualization/archive/2012/07/08/hyper-v-replica-authorization-entries-windows-server-2012...
  • Blog Post: 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. The Understanding and Troubleshooting guide for Hyper-V Replica covers the steps required to configure this role. This post builds on top...
  • Blog Post: TechEd India 2012, here we come!

    If you are in Bangalore, India between March 21st and March 23rd, visit us at TechEd, India ! We have a product tent and a booth for Hyper-V Replica - drop in, meet us and learn more about HVR. - Praveen
  • Blog Post: Hyper-V Replica - Prerequisites for certificate based deployments

    An often asked question from early HVR deployments has been about the product’s certificate requirements. This post captures the pre-requisites for enabling replication using certificate based authentication. HVR uses machine level mutual authentication, which requires you to install the certificates...
  • Blog Post: Hyper-V Replica debugging: Why are very large log files generated?

    Quite a few customers have reached out to us with this question, and you can even see a few posts around this on the TechNet Forums . The query comes in various forms: “My log file size was in the MBs and sometime at night it went into the GBs – what happened?” “I have huge amounts of data to sync across...
  • Blog Post: Update: Capacity Planner for Hyper-V Replica

    In May 2013, we released the first version of the Capacity Planner for Hyper-V Replica on Windows Server 2012. It allowed administrators to plan their Hyper-V Replica deployments based on the workload, storage, network, and server characteristics. While it is always possible to monitor every single perfmon...