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    • StarWind Success Story: One SDS to Revamp All AAA-9 Systems
      Starwind • starwind high availability hardware hypervisor fault tolerance ha shared storage • • Oksana  

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      Windows Server licensing for HA?
      IT Discussion • windows server licensing ha • • Pete.S  

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      @Pete-S said in Windows Server licensing for HA?: If you have two servers and run HA, does that mean that you have to license Windows Server standard for the maximum number of VMs running when you have a failure? So for example, Server A: 16 cores, runs 6 VMs normally Server B: 16 cores, runs 6 VMs normally So each server has to be licensed for all 12 VMs running on 16 cores - so 6 x Windows Server Standard licenses for each server, total of 12 licenses? But if you didn't run HA, you would only license each server for 6 VMs, with 3 x Windows Server Standard, a total of 6 licenses? Is this correct? Yup. If you're running a HA setup of Server Standard, all physical servers must be licensed for all Windows Server VMs that can run on them. This means each physical server in your HA cluster must be licensed for 12 Windows Server VMs. So yes, you are correct in that to license 12 Windows Server VMs on both of your physical servers, you'll need 6x Windows Server Standard licenses for each server, 12 "licenses" total as you said.
    • how do you deal with SPOF with HAproxy
      IT Discussion • ha haproxy spoif • • Emad R  

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      @matteo-nunziati said in how do you deal with SPOF with HAproxy: @stacksofplates said in how do you deal with SPOF with HAproxy: Keepalived is most likely what you're looking for. You assign a VIP to your interface and it keeps a heartbeat between the systems. The VIP (floating IP) will move between systems if there is an issue. Once that's set up, use Serf to update your HAProxy configs or Consul for automatic service discovery which HAProxy can read. If you're using a cloud provider, I'd just use one of their provided load balancers. +1 for serf but I can not find any doc about serf as a distributed config (as consul). I know about serf as a discovery/alive tool only... When systems send their messages to the cluster they can run a script depending on the message. Their example repository has simple Bash scripts to update an HAProxy config. https://github.com/hashicorp/serf/blob/master/demo/web-load-balancer/README.md It's very very simple, but sometimes that's easier than setting up a full Consul cluster.
    • Forget about disasters sabotaging your IT environment with stretched clustering
      Starwind • starwind hyperconverged disaster recovery high availability starwind vsan failover cluster starwind virtual san ha stretched clusters high performance failover-clustering • • Oksana  

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    • Microsoft Windows Server 2016 Core: Failover Cluster Role, Step-by-Step
      Starwind • starwind vsan high availability windows server 2016 starwind vsan iscsi failover cluster ha virtual san failover-clustering ws2016 • • Oksana  

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    • Getting a grasp of what Always On is and how it works
      Starwind • microsoft sql ha highavailability sqlserver disasterrecovery hadr • • Oksana  

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    • Nginx Active-Passive HA
      IT Discussion • high availability nginx ha • • NashBrydges  

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      @nashbrydges said in Nginx Active-Passive HA: @jaredbusch said in Nginx Active-Passive HA: @NashBrydges side question. If you setup the .well-known to work correctly, why do you then need the HA? because nginx will never be down except for the momentary reload after the certs are updated. That certainly addresses the biggest concern about a long downtime during the renewall process for a high number of certs and probably addresses most concerns with this client. He's already running Veeam replication to a second box so his RTO and RPO are relatively short and within his business tolerance. Having said that, it's a great learning opportunity for me to set this up in my lab, if for no other reason than to try it and see how it works. Certainly no reason not to do it for a lab. and for a proxy with as much as it sounds like you have in production, it will still be a likely good solution.
    • Get a true Hybrid Cloud solution for your existing Hyper-V infrastructure
      Starwind • starwind azure hyper-v vsan starwind vsan cluster replication virtual san ha starwind tap room starwind hybrid cloud workload 5nine ha cluster 5nine manager highly available cluster • • Oksana  

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    • Node Majority Strategy – a remedy to the split brain pain
      Starwind • starwind starwind blog starwind virtual san ha heartbeat synchronization split brain high avail node majority quorum witness node • • Oksana  

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      Good read and it explains very clearly what split-brain is, and how to prevent it in simple enough terms. I've had to explain many times myself what split-brain is and ways to prevent it. I just get starred at. . .
    • Choose wisely: SQL Server Failover Cluster Instances vs. Basic Availability Groups
      Starwind • starwind database disaster recovery high availability sql server ha sql server 2016 mission-critical database basic availability groups failover cluster instances dr bags fci • • Oksana  

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      @oksana Still backups are needed
    • KVM Poor Man Replication HA
      IT Discussion • kvm replication ha cheap poor really • • Emad R  

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      @mlnews Thread resurrected !!! I see, interesting . Regarding Ovirt + GLusterFs my update on this is that did learn glustering and it was easy to perform. I didnt apply it in production or VMs. I did use Ovirt a month ago and it was very slow web ui experience. I should write a thread about my and Gluster.
    • Increasing IT infrastructure redundancy with vCenter HA
      Starwind • starwind vmware high availability vcenter ha vsphere 6.5 rto vcenter high availability webin • • Oksana  

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    • Benchmarking StarWind Highly Available shared storage and local storage performance
      Starwind • storage starwind vsan high availability starwind virtual san virtual san ha shared storage local storage storage performance storage benchmarking • • Oksana  

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