Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [fault-tolerance]

89 questions
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VMware High Availability questions

I can't seem to find the answers to these questions within the vSphere 5 Documentation center, so please share if you are aware of any aspects of these questions. What happens to the failed VM that has been configured for High Availability (HA)?…
O_O
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What TLDs should I use for my NS records for redundancy? (DNSSEC support required)

Question As a general practice, is it a good idea to use multiple TLDs for the name servers? How should I choose between which TLD would be a good candidate for being the root server for my NS name? More Info I am switching over 800 DNS zones to an…
makerofthings7
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Redundant NFS on Amazon EC2

I'm interested in building two fault tolerant/redundant NFS servers with failover at Amazon EC2. I'm familiar with tools/technologies like DRBD, Heartbeat, etc. Does Amazon provide any specific way of achieving this through their platform? A…
Trent Scott
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SQL Server 2008 R2 100% availability

Is there any way to provide 100% uptime on SQL Server 2008 R2? From my experience, the downtimes for the different replication methods are: Log Shipping: Lots (for DR only) Mirroring w. NLB: ~ 45 seconds Clustering: ~ 5-15 seconds And all of these…
Mark Henderson
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How can i get a virtual machine in Hyper-V to carry on running in failover cluster. 2 Nodes, Server 2019

Forgive me if I am missing something obvious but I am very new to servers and failover clustering. I haven't found a question that quite answers what I am looking for yet. My goal is to make a VM run 100% (or near enough) of the time using two or…
Meredith
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vsphere network design for vsan and ft-enabled cluster

I am looking for some recommendations on the network design for my ha-ft and all-flash-vsan-enabled vsphere cluster. I've planed around vsphere a bit, but newbie to vsan and ha/ft. I've Googled and searched here on StackExchange, but I just can't…
Arthur
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What happens if an OpenStack cloud controller dies?

I've been reading up on OpenStack and how we can re-create an EC2/S3-style cloud for our internal development and I'm having a hard time finding information on how the OpenStack cloud controller provides redundancy of the cloud management…
Rafael Fonseca
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Can we run a mix of vSphere Standard and Advanced but still use Advanced features?

We have a vSphere cluster of 4 ESXi servers licensed for Standard. We want to purchase some Advanced licenses so that we can use the Fault Tolerance feature in vSphere, but we don't want to upgrade the entire cluster to Advanced if we don't have to…
zippy
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Best option for HA between remote datacentres?

We're reviewing the system requirements that a new client has brought to us. They work in the medical field and the system they want us to host must be at a minimum highly available, and preferably fault tolerant. We're looking at licensing VMWare…
Mark Henderson
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How do IP addresses transfer when using VMware Fault Tolerance?

I've been doing some thinking about VMware Fault Tolerance and I have a question about the networking side of things. I'll state how I think it works, and you can tell me where i'm wrong. Lets say we have a virtual machine, running in FT mode. This…
Ross Wilson
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ESXi Fault Tolerance Network Issue - FT traffic flooded?

I've setup a 2-nodes vSphere cluster. Each node is equipped with 4x1GE NICs. I have set a single vSwitch in each node, using all 4 vmnics as adapters and the following ports: Management: vmKernel port -> Active on vmnic0, Standby on…
kuma
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Failover setup of virtual machines using KVM

I have two physical servers each having: 2 CPUs (6 cores each), 4 network interfaces, 128GB RAM, 4 x 200GB SDD, 2 x 1TB SAS HDD and 1 configurable switch like Cisco Catalyst with support of vlans. I need to host a web application on these 2 servers…
Nurjan
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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 similar to VMWare FT? We have a server application…
Chris S
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mdadm fault injection testing with bad blocks or other unrecoverable errors

I recently lost a drive in my RAID array (and got an email from the system warning me of this, which was awfully nice) and after some drive shuffling and swapping in a new drive I'm all safe and secure. But along the way, I found this thread, which…
ljwobker
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Combine 2 logical raid 0 drives to 1 logical raid 1 drive

I have an HP Proliant server with an P410i embedded array controller. The server was originally setup with 6 physical drives with the OS on 1 logical drive with a raid 0 and 5 physical drives setup as a raid 5. Not the way I would have done it but…
Tripleb316
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