A failover cluster is a group of servers that work together to maintain high availability of applications and services

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Maximum Timer for Drain Roles?

This is one of those weird questions I would expect to be documented (Especially on Tech Net), but I honestly haven't found an actual explanation. As of Server 2012 R2 you can set your cluster nodes ...
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VMXNET3 receive buffer sizing and memory usage

Background We had an incident where a Windows failover cluster suffered an interruption. A post-mortem showed that the node was "removed" as described in this article. We've only recently migrated ...
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How do I know to which node of my Oracle RAC I am connected?

Is there an easy way to determine to which RAC node of an Oracle 11g R2 system I am connected? I am trying to perform some failover tests and I want to make sure my application is correctly connected ...
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30 views

failover cluster creation Error

I am creating a fail over cluster, but doing so i get the error "An error occurred while creating the cluster. An error occurred creating cluster 'testCluster'. This operation returned because the ...
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1answer
19 views

SQL Failover Cluster Clients not updating DNS

I have a multi-subnet SQL Server 2012 failover cluster running on 2 Windows 2012 R2 nodes. The cluster is located on 192.168.1.10 when on NODE A and 192.168.5.10 when running on NODE B. When I look at ...
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Windows Failover Cluster - Create Cluster Wizard: error occurred while creating the cluster

I have 2 identical Windows Server 2008 R2 servers which I am trying to setup a failover cluster on. The "Validate a Configuration" passes, but the actual creation process produces an error: An error ...
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113 views

How to use Docker with HAProxy+Keepalived?

I want to practise in creation of high-available web-application using multiple Docker containers on one machine. I launch several web-servers within Docker containers. Say, three servers rest1, ...
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1answer
44 views

Exchange 2013 DAG Cluster Unable to add second sever

I have two servers (EXCH1 and EXCH2) running Exchange Server 2013 Standard, and a third file server that is a DAG Witness. The first server is a Windows Server 2012 R2 Standard machine and the ...
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3answers
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How does CSV cache behave under memory load?

We're looking at using Microsoft's CSV cache feature in our new Hyper-V 2012 R2 clusters: It's enabled by default, with 512MB allocated to each CSV. The maximum memory that can be assigned is 80%. ...
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1answer
60 views

Get witness disk current vote via PowerShell

I am trying to verify functionality of dynamic quorum in a new failover cluster setup. Is there a command in PowerShell that I can use to see the current vote for the witness disk? I have been ...
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1answer
60 views

I do not see disks while building a Scale-Out File Server on Windows Server 2012 R2

Following are my environment details I have created 2 virtual machines in Azure. node 01 and node 02 Both machines are using windows server 2012 R2 Attached disks for node 01 and node 02 Added node ...
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Server 2012 R2 - Sharing 'cluster shared volume' .VHDX hard drives between two VMs, are they supposed to not live update? [duplicate]

I have a .VHDX volume that's a cluster shared volume in a Server 2012 R2 failover cluster. I'm able to share the hard drive between two VMs. If I create a folder on VM2, it doesn't show in VM1 in the ...
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52 views

Proxmox HA Cluster tiebreaker node

I want to setup a Proxmox HA Cluster using a quorum for reducing the risk for a split-brain. So I need 3 nodes. Is it possible for one of the nodes to just act as a tiebreaker node without running any ...
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1answer
8k views

How to delete a Virtual Machine from Hyper-V Failover Cluster

I have a Hyper-V 2008 R2 failover cluster with 3 nodes. I added new 3 Virtual Machines to the failover clusters, one of them failed with errors: Event ID: 1069 Cluster resource 'Virtual Machine ...
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18 views

Can't see fileshares in Windows Failover Cluster Interface

I am unable to see Fileshares I've added to my Windows Failover Cluster And I get this error But I can see them via powershell Get-SmbShare -ScopeName my_server_role | Select * I am a domain ...
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3answers
55 views

Windows failover cluster with two quorum disk witnesses?

To avoid a single point of failure on the backend SAN system, can I place one quorum witness disk on each site and have the cluster use both?
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1answer
25 views

Should I continue to use MSDTC in my new virtual environment for MSSQL?

In the past I have used a two node cluster setup. All the services (SQL, File Server, App Server, DTC) were passed back and forth within the cluster as normal. Now I take a different approach. I ...
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1answer
49 views

Windows Server 2012 R2 Hyper-V - High Availability (Clustering): Connect servers to storage using FC: switch or direct attach?

My scenario: I have a DS3400 DISK SYSTEM DUAL CONTROLLER FIBRE CHANNEL storage equipped with two controllers each equipped with two 4-GBPS FC ports, for a total of four FC ports. Then I have four ...
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1answer
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Windows Server 2012 Failover DHCP

I've been tasked with migrating from our current 50/50 scope resilient DHCP servers to new hot standby failover DHCP in Server 2012 R2. Built a test bed with the two DHCP server VMs and created a ...
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7answers
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Why are my HyperV VM's randomly losing connectivity?

I have a strange intermittent connectivity problem happening about once every two weeks. First my configuration: I am running a HyperV failover cluster with two physical hosts (node01 and node02). ...
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0answers
30 views

MS SQL - HA & load balancing best solution for servers at different geo-location

Customers has App server (MS Server 2012) and Storage server (MS SQL 2012), with several hundred clients accessing server app via VPN. Now they want to have a high-availability and also load ...
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48 views

Failover Cluster DFS issue

I have a Windows 2008 R2 Failover Cluster. I have a Windows 2012 R2 Failover Cluster. I have been able to use the Copy Cluster Role to migrate 70 VM’s and the DHCP service from the Windows 2008R2 ...
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1answer
115 views

Adding a share in a Failover Cluster with quotas enabled takes 10 minutes

I have File Service cluster where one of the file server resources is hosting ~50,000 user home directories. The home directories do have a quota template assigned through the FSRM. When trying to ...
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3answers
327 views

Multiple Nics, multiple default gateways on a Server 2012R2 cluster

This is really just a question about best practices as there seems to be a little confusion. The physical hosts of our Hyper-V cluster have 4 Nic interfaces relating to the 4 subnets. Now, when ...
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134 views

Why do I get BPA error “Servers in Failover Clusters Must Have a Hyper-V Replica Broker Configured”?

I configured a Hyper-V Failover Cluster with two nodes and one domain controller. Cluster-Aware Updating is enabled. The BPA shows the following error: To Participate in Replication, Servers in ...
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406 views

Dynamics AX 2009 Falls Over when SQL Cluster Rolls

We had an issue on one of our production database nodes which caused it to fail over to another. This caused a brief outage whilst the service rolled. This temporary glitch however was enough to ...
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700 views

Could not get domain controller name from machine

While validating a Failover Cluster over two member servers I get the following two errors: Connectivity to a writable domain controller from node SQL2.domain.com could not be determined because of ...
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Use a shared vhdx as shared drive

I have a Windows Cluster made up of two nodes connected via SAS to a storage array. I have two virtual machines configured with their hard disks (vhdx) on the shared storage. They are up and running ...
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43 views

What exactly is the “client” in Failover Cluster Manager in Hyper-V environment?

Recently, in my Hyper-V environment, we broke out the ip addresses used on the hosts into separate subnets, some of which are non-routable. Now I am seeing a "target name resolution" error in Server ...
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1answer
97 views

Best Way to Restart 2 Node SQL Cluster To Perform Windows Updates?

So I have a 2 node MS SQL Server cluster, using AlwaysOn, on Windows 2012 r2. SQL1 is the primary. SQL2 is the secondary. I want to restart both servers today to perform windows updates which will ...
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24 views

New SAN space presented cause issues with Win 2008r2 cluster (wont reboot and disk manger wont load)

I have an issue where I have a 2 node Win 2008 r2 cluster with SAN attached storage. Existing storage is on an older array but we are being migrated to a newer one. When the storage team "Zones" new ...
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1answer
36 views

Failing over to mirror instance when not using a witness server

I have a set up where I have two SQL servers set up for failover mirroring to two other SQL servers. I am not using a witness server. I had previously used a witness server and that of course would ...
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3answers
219 views

Clustered File Server on Windows 2012 With Local Storage

So I have a SQL Always-On group that requires a file share witness. I want that file share witness to be redundant and since I have no other need for a file server on this network, I'd like to do it ...
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2answers
31 views

Creating a failover cluster of 2 VMs

I'm trying to create a cluster of 2 VMs on hyper v. The 2 VMs and the host server all running on win 2008 r2. When attempting to test validation for the failover cluster I'm getting an error of "disk ...
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1answer
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unable to destroy windows 2008 r2 failover cluster after SAN rebuild

I created a windows 2008 r2 failover cluster for a sql 2008 active/passive cluster. This two node cluster was using a SAN device for a quorum disk resource as well as MSDTC resource. Well....I ...
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2answers
32 views

Fault Tolerance with Windows Server Failover Clusters?

I've attempted to read numerous articles online about this and believe I'm "seeing the light", but I'd like to have it confirmed. Do Windows Server Failover Clusters offer a fault-tolerant feature ...
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Can Failover Clustering in WIndows be set-up on Google Compute?

My understanding is that a Windows Failover Cluster node must be multihomed and that GCE Instances cannot be multihomed. Is this the case, please?
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2answers
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Removed cluster disk that wouldn't come online, now it wants to be formatted. Can I recover the data?

I inherited a failover cluster hosting several VMs and some storage volumes. It uses a fibre-channel SAN for storage. I updated firmware on the SAN controllers recently and when it came back up one of ...
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1answer
134 views

How to set foreign-domain alias for a Failover Cluster client access point?

I have a migration scenario with a Failover Cluster file service where I would like to add the alias for the old file server name pointing to the cluster service client access point name. Using ...
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1answer
194 views

Clustered SAN volumes not showing up in Windows Explorer

Occasionally my drives will not show in Windows Explorer even though they appear online (Reserved) and mapped to a drive letter in Disk Management. I'm not sure what makes them come back but right now ...
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3answers
2k views

What hotfixes/updates does a new 2012 R2 Hyper-V server need?

I'm building several new 2012 r2 Hyper-V servers. One thing that I've read over and over again is that there are A LOT of hotfixes that i need to install on top of the regular OS updates Microsoft ...
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Questions about a Scale-Out File server cluster setup [closed]

for a learning project, i've got the following hardware configuration: 6x HP DL360G7 1x HP P2000G3 SAS + 1x HP D2700 SAS 8x 136GB 10k 3Gbps 12x 136GB 15k 3Gbps 6x 136GB 15k 6Gbps 4x 900GB 10k ...
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Windows Failover Cluster Generic Script

I have two windows server 2012 R2 machines set-up in a cluster. Everything seems fine with regular services but when I try to create a generic script resource I encounter the following vague error: ...
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1answer
406 views

How to make Nginx fire 504 immediately if server is not available?

I have Nginx set up as a load balancer with cookie-based stickiness. The logic is: If the cookie is NOT there, use round-robbing to choose a server from cluster. If the cookie is there, go to the ...
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1answer
34 views

What is Best Practice for migrating SQL 2012 system databases to failover cluster?

What is the best practice for copying system databases when migrating from SQL Server 2012 (no SP) to 2012 SP2 in a Failover Cluster? Just backup and restore? Or, script out and script in?
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Hyper-V - Upgrading a 3 node 2008R2 cluster to 2012R2

I'm just after a some advice/tips on upgrading our 3 node Hyper-V cluster from 2008R2 to 2012R2. I have 3 x Dell r710s running Server 2008R2DC. These are clustered and running about 15 VMs (5 on each ...
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1answer
108 views

Server 2012 Cluster - Second Node Can't Ping Items

I've got a server 2012 SQL Cluster and all of the processes failover and run properly. The only odd behavior is that when I fail over to the secondary node, there are certain items on one NIC that can'...
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113 views

Failover Forward IP Packets with port from one server to another

Basically none of the solutions online have worked so far. Here's my setup: To simplify things, we're gonna assume it's a VNC server, My setup is a fully integrated OwnCloud and Ulteo. I've ...
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1answer
1k views

Windows Failover Cluster - Trying to create MSDTC Role - AD Permissions issues?

I normally hang out in the DBA Exchange but I'm coming to ServerFault this time with a Clustering issue. I am trying to create a MSDTC role for my Windows 2012 R2 Cluster. The IP address and disk ...
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2answers
188 views

SAN: How to determine amount of LUN and CSV

We have inherited Hyper-V environment (2008 R2) with SAN storage (HP4500 hardware). Two hosts and two SAN's for redundancy. Whilst I understand virtual machines well, I guess, my knowledge of storage ...