Why does HA kick in when you loose connection between sites at 13:40? Witness should see that both sites are good? Same thing at 14:04, why HA kicks in just because one site loose witness, the two sites can still see each other? Sounds like a lot of unnecessary restarts and you also move the VM away from its source (closest to production).
Hello. Thanks for watching. Wen you loose the connection between sites, the Master node in Site A no longer can See the Backup Node in Site B. This is a network partition and components are no longer able to be updated between the sites. When this happens, the Master at Site A will form a cluster with the Witness and all VM's on Site be will fail over to Site A. Prevents a split brain.. As for Site A loosing a connection with the Witness, but the Inter Site Link still up, the VM's at both sites still continue to run.. Looks like I will have to do an update video. Thanks for pointing it ou, Not sure what I was thinking. Have a great day..
Hello, Professor! I need to ask a question, please. I have a client who has an extension cluster and we need to shut down the secondary site for electrical maintenance. The environment has 8 hosts, so we will need to shut down 4 of them, and the storage fabric is configured with Raid 5. Are there any impediments that I should be aware of? We are planning to disable DRS and HA, including some virtual machines. Increase the resync time, as the maintenance should take approximately 8 to 12 hours. Manually evacuate the secondary site, put the hosts in "Ensure Accessibility" and shut them down.
Thanks for watching.. Can you provide some more specifics on what limits you are looking for?? You can also check the ConfigMAx at VMware. configmax.esp.vmware.com/guest?vmwareproduct=vSphere&release=vSphere%208.0&categories=7-0 Have a good one.
@@TechUnGlued sorry I had to be more precise. I meant limitations. So in my mind if I configure a 2 host vSAN stretched cluster what’s the impact on vSphere HA for example
@@rastyle11 If you are configuring a "2 Node STRETCHED cluster" you will be able to only loose one component.. No site Mirroring option available.. If it is NOT a stretched cluster, then site mirroring is an option and Nest Fault domain kick in - depending on your configuration.. Take a look at that video. Hope this helps..
Why does HA kick in when you loose connection between sites at 13:40? Witness should see that both sites are good?
Same thing at 14:04, why HA kicks in just because one site loose witness, the two sites can still see each other?
Sounds like a lot of unnecessary restarts and you also move the VM away from its source (closest to production).
Hello. Thanks for watching. Wen you loose the connection between sites, the Master node in Site A no longer can See the Backup Node in Site B. This is a network partition and components are no longer able to be updated between the sites. When this happens, the Master at Site A will form a cluster with the Witness and all VM's on Site be will fail over to Site A. Prevents a split brain.. As for Site A loosing a connection with the Witness, but the Inter Site Link still up, the VM's at both sites still continue to run.. Looks like I will have to do an update video. Thanks for pointing it ou, Not sure what I was thinking. Have a great day..
Good explanation and one of the best video on this topic
Glad you liked it. Thanks for watching and have a great day
Toptastic presentation and demonstration.
Thanks. Have a great day
Hello, Professor!
I need to ask a question, please.
I have a client who has an extension cluster and we need to shut down the secondary site for electrical maintenance.
The environment has 8 hosts, so we will need to shut down 4 of them, and the storage fabric is configured with Raid 5.
Are there any impediments that I should be aware of?
We are planning to disable DRS and HA, including some virtual machines.
Increase the resync time, as the maintenance should take approximately 8 to 12 hours.
Manually evacuate the secondary site, put the hosts in "Ensure Accessibility" and shut them down.
I would just make sure that the components that make up each VM is located on the primary site so there is no failure on the VM. Hope this helps.
@ thank you!
Excellent video. I am binge watching :)... one question here. Will the vm network be l2 or l3 ?
Thanks for watching.. The VM network would be Layer 2 Have a good one
Love it.Thank you.
Thank you too for watching. Have a great day
what are the general limits if I configure a stretched cluster using only two hosts (1 host per location)?
Thanks for watching.. Can you provide some more specifics on what limits you are looking for?? You can also check the ConfigMAx at VMware.
configmax.esp.vmware.com/guest?vmwareproduct=vSphere&release=vSphere%208.0&categories=7-0
Have a good one.
@@TechUnGlued sorry I had to be more precise. I meant limitations. So in my mind if I configure a 2 host vSAN stretched cluster what’s the impact on vSphere HA for example
@@rastyle11 If you are configuring a "2 Node STRETCHED cluster" you will be able to only loose one component.. No site Mirroring option available.. If it is NOT a stretched cluster, then site mirroring is an option and Nest Fault domain kick in - depending on your configuration.. Take a look at that video. Hope this helps..
@@TechUnGlued thanks 🙏
The 90s called and wanted their webcam back.
. It's not that old. It is a HD PRo C920. Thanks for watching and have a good one.. :)