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13 votes
Accepted

server 2016 active directory and hyper-v same server

Having 2-node cluster, it's beneficial to have at least 2 AD DC VM's each located on a separated host. In case of a host failure, you will ensure the AD is up and running. The AD running on a VM also ...
Mr. Raspberry's user avatar
7 votes

Microsoft iSCSI target server 2016 failover cluster doesn't work in Server Manager after transfering roles

I see similar issue posted on technet. Is there any chance to see what does Event Log show? For the case, from my experience, Microsoft iSCSI target is too slow. Currently, I use StarWind Virtual SAN ...
Mr. Raspberry's user avatar
7 votes
Accepted

Nano Server attached to SAN doesn't see new files

NTFS is not a cluster-aware file system. It was never designed to support simultaneous access from different clients. In order to allow multiple access: configure MPIO, deploy the Failover Cluster ...
Strepsils's user avatar
  • 5,115
7 votes
Accepted

Is there any way to prevent Storage Spaces Direct from automatically adding disks?

Yes, you can disable the auto-pooling behavior. The experience is not great, but it’s certainly do-able and supported. The setting name, and example cmdlet syntax, is in the Settings section of this ...
Cosmos Darwin's user avatar
7 votes
Accepted

Mapping SAN to cluster nodes

Oh god, you've not have you? You've just caused immediate, irretrievable data loss sorry. NTFS isn't a cluster-aware file system, you need something to act as a lock manager too. MS Cluster Services ...
Chopper3's user avatar
  • 102k
7 votes

Building a low-cost, high-availability cluster using Windows Failover Cluster or Proxmox

You can absolutely use SR (Storage Replica) to build a “poor man’s” Windows Server Failover Cluster (WSFC). See the example below where guys used SR to cluster SMB3 file service. https://www....
BaronSamedi1958's user avatar
6 votes
Accepted

VMXNET3 receive buffer sizing and memory usage

What is the relationship between number of buffers and ring size? They're related, but independent. The rx "ring" refers to a set of buffers in memory that are used as a queue to pass incoming ...
Roger Jacobson's user avatar
6 votes

Miserable performance of Hyper-V storage on CSV

If you use Broadcom NICs, try to disable VMQ on a virtual switches and on a physical network adapters: http://www.dell.com/support/article/ua/ru/uabsdt1/SLN132131/EN You might also check if there are ...
batistuta09's user avatar
  • 9,151
6 votes
Accepted

Storage Spaces Direct HDD MediaType is unspecified

You have to have supported media types with Storage Spaces Direct which is no-RAID, no-FC and no-iSCSI. Should be SATA, SAS and NVMe. https://docs.microsoft.com/en-us/windows-server/storage/storage-...
BaronSamedi1958's user avatar
6 votes

Synology HA active-passive performance and failover

Decouple your Synology HA setup, RMA one of these units with "Your HA does not work!", and get VMware or similar vSAN to enjoy local disk performance, and reliability. Whatever you'll do you won't ...
BaronSamedi1958's user avatar
6 votes
Accepted

Edit HA cluster config cib.xml

You're definitely correct in saying you don't want to edit the cib.xml directly. Since you're using pcs to manage your cluster configuration, you should do it like this: Dump the current cib to a ...
Matt Kereczman's user avatar
6 votes

How does Virtual IP work for failing over a TCP connection to a backup server to accomplish high-availability?

We should clarify some terms and technology. The image you show is that of a "Load Balancer." While technically, the Load Balancer will usually have one or more "frontend" IP addresses that connect ...
Appleoddity's user avatar
  • 3,870
6 votes
Accepted

Internal storage as HA failover cluster storage pool ?

As comments bellow say, Windows Server 2016 Datacenter Edition has built-in Storage Spaces Direct (S2D) that allows to implement/setup hyperconverged cluster of 2 or more nodes. However, it has been ...
Mr. Raspberry's user avatar
6 votes

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

Take something like Starwinds and create Highly Available shared storage with your two nodes. AFAIR, they have a lot of manuals which may help you. BTW, it's for free. https://www.starwindsoftware....
Stuka's user avatar
  • 5,865
6 votes
Accepted

How to setup IIS on Failover Cluster with Shared Data

The NTFS/SMB permissions for shared IIS storage are detailed described in ms guide: https://docs.microsoft.com/en-us/iis/web-hosting/configuring-servers-in-the-windows-web-platform/configuring-share-...
batistuta09's user avatar
  • 9,151
6 votes

Am I doing this wrong? Networking - High Availability: SAN, MSFT Failover Cluster, NIC Teaming

(1) Storage. QNAP would make a decent backup target, say used over iSCSI with Veeam, but it's quite a poor choice in terms of the primary storage. Performance isn't great, but the worst part is... It'...
NISMO1968's user avatar
  • 1,060
6 votes
Accepted

Failover Cluster Disk Replication

Storage replica supports either Cluster-To-Cluster replication or Stretch Cluster with shared storage. Technically you should be able to configure it, if you have separate shared storage connected to ...
Stuka's user avatar
  • 5,865
5 votes
Accepted

Get witness disk current vote via PowerShell

In Windows Server 2012 R2, "The clustering service will automatically assign the witness a vote, the witness dynamic vote, depending on if there is an odd or even number of votes present for the ...
Lance Jensen's user avatar
5 votes

How to use Docker with HAProxy+Keepalived?

You may need to enable non-local binding on the docker host. Add net.ipv4.ip_nonlocal_bind=1 to the end of the /etc/sysctl.conf file and force a reload of the file with the sudo sysctl -p command.
Dave's user avatar
  • 151
5 votes

Which technology allows shared storage for clusters with preferred local reads and writes?

Since you about deliver shared storage system having local I/O preferably, I would suggest to look at solutions that do kind of asynchronous replication between clustered hosts. I suspect the ...
Mr. Raspberry's user avatar
5 votes

Storage Spaces Direct HDD MediaType is unspecified

Right, using Storage Spaces Direct in two or three nodes configuration is not the best idea. There are a lot of solutions in this niche like HPE or Starwind. HPE Storevirtual works with two nodes and ...
Stuka's user avatar
  • 5,865
5 votes
Accepted

Synology HA active-passive performance and failover

Unfortunately, Synology HA feature does not support active-active mode. If you want to speed things up you might do RAID0 but it’s quite dangerous and will completely load your networks (especially on ...
batistuta09's user avatar
  • 9,151
5 votes
Accepted

How to securely encrypt Hyper-V VMs in Failover Cluster

The performance will fall anyway. No need to double encryption. I would not recommend using TrueCrypt fork-outs. Configuring BitLocker on Cluster Shared Volumes does the job.
Strepsils's user avatar
  • 5,115
5 votes

Mirroring 2 Host with their own local storage

Look at StarWind VSAN 2-nodes hyperconverged solution on VMware here. It gives a possibility to mirror storage between the hosts and present it as HA datastore to the cluster. Virtual Machines can be ...
batistuta09's user avatar
  • 9,151
5 votes

Cluster Fails when Enabling Storage Spaces Direct Server 2016

Don’t do S2D with only two nodes as it’s nothing but begging for troubles! Failover isn’t reliable and you can’t lose second node (obviously!) or second disk/ssd in a row. In RL it means your cluster ...
BaronSamedi1958's user avatar
5 votes

Cluster Fails when Enabling Storage Spaces Direct Server 2016

Plus one for not to use S2D with two nodes. Starting from poor reliability and ending with short features list in such scenario. There are a lot of topics with comparing S2D with any other solutions, ...
Stuka's user avatar
  • 5,865
5 votes
Accepted

vSphere 6.5 HA agent cannot be correctly installed or configured

I know you mention you already tried it, but in case it helps someone else I just wanted to say that the solution for us was to disable / remove the HA configuration entirely from the entire cluster ...
Paul Hite's user avatar
5 votes
Accepted

DRBDManage with Pacemaker on CentOS 7

DRBDmanage will not work correctly in “pure” 2-node setup, because of lost quorum. drbdmanage will work properly in following cases: 1 node 2 nodes and both are online. Otherwise the quorum will not ...
batistuta09's user avatar
  • 9,151
5 votes

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

There is an option to build distributed MDT environment, which can cover your needs. https://docs.microsoft.com/en-us/windows/deployment/deploy-windows-mdt/build-a-distributed-environment-for-windows-...
Stuka's user avatar
  • 5,865
5 votes
Accepted

Mixing server models in Hyper-V Failover Cluster

You can do it and it will work. You will need to have processor compatibility option enabled to migrate VMs between hosts. If you buy the same Dell servers, I would recommend you to split them into 2 ...
Stuka's user avatar
  • 5,865

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