Understanding Hyper-V Virtual Machine (VM) Failover Policies

In this blog I will discuss the behavior of the failure policies for a highly available Hyper-V virtual machine.  For the most part, cluster failover policies are generic and apply to all workloads on a cluster, whether it is SQL, a File Server, etc.  There is a wealth of documentation out there, but I thought… Read more

Clustered File Servers and the Remote Volume Management Firewall Setting

Hi Cluster Fans,   A common mistake when creating clustered file is not opening the appropriate firewall setting, Remote Volume Management.  This can cause the file server to give errors for various operations.  Remote Volume Management provides remote software and hardware disk volume management using RPC.  More information about using Remote Volume Management with File… Read more

Changing Clustered IP Addresses & Configuring a DHCP or WINS Cluster

Hi Cluster Fans, In Windows Server 2008 and Windows Server 2008 R2 we have simplified how easy it is to create and use a Failover Cluster.  For example, if we detect you are using DHCP in your datacenter, we will automatically assign the cluster as well as clustered applications and services a DHCP IP Address. … Read more

Trouble Connecting to Cluster Nodes? Check WMI!

A frequent cluster network connection issue we see happens when the cluster cannot use WMI.  WMI is Windows Management Instrumentation, which is an interface through which Windows components can provide information and notifications to each other, often between remote computers (more info about WMI).  Failover Clustering and System Center Virtual Machine Manager (SCVMM) often use WMI… Read more

Clustering & High-Availability at TechEd Europe

Hi Cluster Fans,   In a few weeks the cluster team will be presenting at TechEd Europe from November 8-12 in Berlin, Germany.  Additionally, several partner teams and Cluster MVPs will also be delivering high-availability sessions.  Throughout the week, the team will be staffing the cluster booth, so please stop by to ask us whatever… Read more

Evaluating High-Availability (HA) vs. Fault Tolerant (FT) Solutions

When evaluating how to increase availability and reduce downtime for your deployments, solutions can commonly be categorized as either a ‘High Availability’ solution or a ‘Fault Tolerant’ solution.  In this blog I thought I would take a moment to discuss pros and cons of each. High Availability Solutions High availability solutions traditionally consist of a… Read more

Recommended Partner Blog Posts: Mapping Cluster.exe to PowerShell, PowerShell for iSCSI & Storage Server 2008 R2 RTM!

Hi Cluster Fans,   We wanted to let you know about some great cluster-related blog posts that Jose Barreto, a Program Manager on the File & Storage team, has recently published. Mapping Cluster.exe Commands to Windows PowerShell Cmdlets for Failover Clusters – Extended Edition Link: http://blogs.technet.com/b/josebda/archive/2010/09/19/mapping-cluster-exe-commands-to-windows-powershell-cmdlets-for-failover-clusters-extended-edition.aspx While many of the Windows Server Failover Cluster (WSFC)… Read more

What is new for NLB in Windows Server 2008R2?

  In Windows Server 2008 R2 several improvements have been made to the Network Load Balancing (NLB) technology.    Extended Affinity In the past, affinity was only honored for open connections when a failover occurs.  In 2008 R2 we added what is known as “Extended Client Affinity”.  When Extended Affinity is enabled and node membership… Read more

Creating a Cluster Resource DLL (Part 5): Logs

Hi,   In this series of blog posts we will help you to design, develop and debug the Resource DLL you are developing to give your application high-availability with Windows Server 2008 & 2008 R2 Failover Clustering.   We recommend you start with the other blog post in the series: ·         Part 1: http://blogs.msdn.com/b/clustering/archive/2010/03/11/9976620.aspx ·        … Read more

Creating a Cluster Resource DLL (Part 4): IsAlive & LooksAlive

Hi,   In this series of blog posts we will help you to design, develop and debug the Resource DLL you are developing to give your application high-availability with Windows Server 2008 & 2008 R2 Failover Clustering.   We recommend you start with the other blog post in the series: ·         Part 1: http://blogs.msdn.com/b/clustering/archive/2010/03/11/9976620.aspx ·        … Read more