Questions tagged [failovercluster]

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

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server 2016 active directory and hyper-v same server

I am getting ready to move my production environment from server 2012 R2 to server 2016 I want to do a clean install and in doing some inventory really only have two server I can use for staging, I ...
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How to build a high availability Postfix system?

I'm needing to set up a remote mirror for a postfix server (where the content of both mail servers should be the same at any time). The idea is that if the main server comes down at some point the ...
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3answers
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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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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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2answers
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Is there any way to prevent Storage Spaces Direct from automatically adding disks?

Got a problem here on a 2016 Windows Server Failover Cluster (WSFC) hosting an SQL Failover Cluster Instance (FCI) employing Storage Spaces Direct (S2D). On each server, after successful initial ...
8
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1answer
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How Does Failover Clustering Work in Windows 2008 R2?

I am trying to learn how the failover clustering features works with Windows 2008 R2 as I am going to be using as part of SQL Server 2012 always on. I have been able to find information on how to set ...
7
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7answers
549 views

High availability virtual machines

I've been reading a lot about high availability virtualization, either via Hyper-V or VMWare. In that context, essentially high availability means that the VM is hosted by a cluster of physical ...
7
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4answers
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Two-Node Server 2012 R2 Hyper-V Cluster: Is it possible use local physical disks in the cluster?

Looking at the following Clustered Shared Spaces TechNet article, and it looks like this only applies to hosts sharing a JBOD enclosure by way of external SAS backplane. However, each host in the two-...
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3answers
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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 ...
7
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1answer
356 views

DRBD for HA Server in Small Office Questions

Backround: We are in need of a HA server in a small office environment and are looking at DRBD to provide it. We only have about 100GB that needs to be on the HA server and server load will be ...
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1answer
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How to setup IIS on Failover Cluster with Shared Data

I'm trying to setup a highly available IIS for public facing websites, and I'm having a hard time finding information on the best and most secure method of setting up the permissions, correctly ...
7
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1answer
205 views

Internal storage as HA failover cluster storage pool ?

I have 2 HyperV server (2012 R2) nodes with shared ISCSI storage (ubuntu 16.04) in a Failover Cluster. I want to make that 3 servers (windows server 2016 and/or 2012r2) each with 2 partitions, one ...
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1answer
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Miserable performance of Hyper-V storage on CSV

I recently setup a new environment consisting of: - QSAN Storage with 10Gib network - Mellanox switches 10Gib - 4 x Physical nodes connect to LAN and SAN 10Gib The physical hosts are connected ...
7
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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 ...
6
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3answers
1k views

Synology HA active-passive performance and failover

I have two Synology boxes (DiskStation DS1817+) that are running in Synology HA mode filled with WD Black 4TB drives in RAID10. They are connected to my cluster over iSCSI providing mainly backup ...
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3answers
828 views

Cluster Fails when Enabling Storage Spaces Direct Server 2016

I'm trying to get a 2 Node Hyper-converged Fail-over cluster setup with 2016 Server and Storage Spaces Direct. I am able to Validate (with no errors) and Create the Cluster with the S2D tests ...
6
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1answer
621 views

DHCP Server only remembering one lease

I have a Server 2008 R2 DHCP Failover Cluster that serves two VLANs - an office network and a guest WiFi network. Both of the members of the failover cluster are virtual machines (ESXi) and use the ...
6
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1answer
3k 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 ...
6
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1answer
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Storage Space Direct : SMB error

So we've got this 4-node Storage Space Direct (S2D) cluster, working for more than 1.5 year without any major issue. The OS is Windows Server 2016. Firewall down for all profiles No antivirus ...
5
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5answers
71k views

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 ...
5
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3answers
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Storage Spaces Direct HDD MediaType is unspecified

I have two HP ProLiant DL380 Gen9 servers with Windows Server 2016 on which a SQL Server 2016 is to be installed in the failover cluster with Storage Spaces Direct. When I try to activat S2D via ...
5
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2answers
140 views

Nano Server attached to SAN doesn't see new files

I have recently provisioned two servers that are attached to a Lenovo S3200 with fibre channel. These are the only two servers attached. The servers are running Windows 2016 Nano, and I have installed ...
5
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2answers
79 views

On Server 2016, can i set up a cluster and install MDT so that MDT is highly available?

I am tasked with setting up a MDT server for deploying OS to 25000 endpoints. Is it possible for me set up clustering and then install MDT so MDT is HA. I am also planning to host the deployment share ...
5
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1answer
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Microsoft iSCSI target server 2016 failover cluster doesn't work in Server Manager after transfering roles

I have a pair of Server 2016 VMs in a failover cluster running the File Server and iSCSI Target Server roles. Previously each role was separately defined in the Failover Cluster Manager, but due a ...
5
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4answers
26k views

Failover cluster failed to failover due to mysterious IP conflict?

I'm having a mysterious problem with my Failover cluster, Cluster name: PrintCluster01.domain.com Members: PrintServer01.domain.com andPrintServer02.domain.com in the Failover Cluster Management – ...
5
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1answer
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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 ...
5
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1answer
363 views

Windows Server 2019 iScsi MPIO multiple targets

I'm looking to setup a Windows Server 2019 failover cluster with iScsi shared storage (for a SQL Server Always-On instance). The additional requirement is to not have a single point of failure. Let's ...
5
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1answer
109 views

Nested Virtualization and CSV issues in Hyper-V server Cluster Failover

I have 3 Windows server 2019 VMs,virtualized on Windows 10 pro. (MAIN HOST) server 1 is AD/DC/ISCSI target/DNS/DHCP. server 2 and 3 formed a failover Hyper-V Cluster and this cluster hosts a ...
5
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1answer
3k views

Redis: read-only slave vs fail-over slave?

I'm reading a lot of documentation around Redis network configurations, and I'm confused about how it seems the requirements in the architecture mental model I had, don't seem to map with the current ...
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2answers
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Mirroring 2 Host with their own local storage

I'm trying to decide between 2 infrastructures. 1. 2 Servers host that point to a NAS 2. 2 Servers that mirror each other with their own local storage. Infrastructure Requirements: 50 TB of storage,...
5
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2answers
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Storage of User Profile Disks on file server cluster (SOFS or normal)

We are looking to deploy a new file server cluster, one of the things of which to be stored on it, will be Server 2012 R2 remote desktop User Profile Disks (UPDs). My question is, is it best practice ...
5
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1answer
5k views

SQL Server 2008 R2 cluster, “available storage” shows “offline”

I've installed a SQL Server 2008 R2 cluster and I found the resource group "available storage" shows "offline" status. What does it mean? It seems I can't take it online. I tried to use the cluster ...
5
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1answer
583 views

Creating a two-node Hyper-V failover cluster with a SAN

I'm new to failover clustering and looking for verification that my oversimplified steps below are appropriate as a starting point. I have two Dell R430s (Windows Server 2012 R2 Enterprise) that will ...
4
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2answers
2k views

Why can't I make a failover cluster using iSCSI for shared storage?

I’m trying to build a 2-node failover cluster (sqlnode-1, sqlnode-02) using Server 2016 guest VMs in my Hyper-V-based lab. The problem I have is that the cluster wizard doesn’t recognise my shared ...
4
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1answer
284 views

Mapping SAN to cluster nodes

I have mapped a block of space from SAN to 3 cluster nodes (2012r2)as below: 2 ports from each node have been mapped to the same share on SAN for redundancy. MPIO has been configured on all nodes SAN ...
4
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3answers
609 views

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%. ...
4
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1answer
941 views

How to securely encrypt Hyper-V VMs in Failover Cluster

Having TPM 1.2 installed on 2x Dell x730, what options to encrypt user and network data in Failover Cluster? I see Windows Server 2016 allows to passthrough the TPM to the VM. https://charbelnemnom....
4
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3answers
4k views

Should the SAN (Dell MD3200) management port be on the same subnet/VLAN as the failover cluster private subnet/VLAN?

So, I'm getting a bit confused here. I have a Dell MD3200 SAN with dual controllers. Each controller has an Ethernet management port that connects to a switch. Together the two controllers connect to ...
4
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2answers
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Azure Windows 2016 Failover cluster

I would like to setuo a generic service on a windows 2016 failover cluster but can see there are some issues with shared storage,additional network cards and ip addresses on Azure, is it supported on ...
4
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1answer
159 views

What may increase the latency 3-4 times for SQL FCI the database?

We have SQL Server Basic Availability Groups (BAG) configured to run an SQL database running over local Intel SSD drive. I was asked to move a database to SQL Server Failover Cluster Instance (FCI) to ...
4
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1answer
6k 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, ...
4
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1answer
547 views

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 ...
4
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1answer
2k views

Does dynamic quorum with Windows Server 2012 clusters make quorum configuration types irrelevant?

There are several quorum types: Node Majority,Node and Disk Majority,Node and File Share Majority,No Majority: Disk Only I did not modify any quorum settings when setting up a Server 2012 R2 cluster ...
4
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1answer
1k views

Converting a Windows Server 2012 R2 Scale-Out File Server Back To Regular File Server. Is It Possible?

Well... I messed up. I didn't do enough research and just checked out the headlines then jump head first into the new Scale-Out File Server that Windows Server 2012 R2 brings to the table. At first ...
4
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1answer
4k views

What are the best practices for NIC teaming in Server 2012 R2? Broadcom or Windows software?

I have a Windows 2012 R2 Hyper-V cluster with two Broadcom adapters for my LAN connection. Currently, we have a virtual switch set up with SCVMM, that teams together both NICs using Windows software ...
4
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1answer
1k views

Add MySQL as a resource to pacemaker

I am trying to enable fail over strategy using pacemaker on a mysql Master-Master replication on two virtual machine running openSUSE 12 created by VritualBox. I managed to complete the mysql dual-...
4
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1answer
17k views

System Account Logon Failures every 30 seconds

We have two Windows 2008 R2 SP1 servers running in a SQL failover cluster. On one of them we are getting the following events in the security log every 30 seconds. The parts that are blank are ...
4
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2answers
100 views

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 ...
4
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1answer
1k views

Hyper-V R2 can't add a teamed NIC as External Network

I have a Dell PowerEdge R710 running Windows Server 2008 R2 Datacenter and which was part of a Hyper-V Failover Cluster. It has 8x Broadcom BCM5709C NICs and three are teamed together to be my "...
4
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1answer
2k views

cisco asa reloading

After having both memory and code upgrades, we have a significant number of our asa 5520's (in active/standby pairs) develop problems. The problem manifests itself as losing connectivity to the other ...

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