Always on Availability group (AG) cluster in SQL Server

[@fpost337]

Great content and balance between concepts and practical example!

[@arslanov1886]

Thank you. Glad it helped🙂

[@user-zz5ql5rq6f]

Thanks for this. At last I understood AG. I have never seen this kind of detailed video for AG internals. This is very good channel for internals :)

[@umakantkesgire7720]

Very useful information. Thanks a lot 🙏

[@arslanov1886]

Most welcome 😊

[@amarcse06]

Good session mate..please make the videos of basic troubleshooting in AOAG..thank you 🙂

[@arslanov1886]

Sure mate. Thanks for suggestions

[@vijaymunavalli335]

cool explanation.. thanks!!🙂

[@arslanov1886]

Glad it was helpful!

[@riazkm9136]

when we create windows failover cluster for SQL AG, do we need to have quorum disk / file witness? what is the best practice for the same.

[@arslanov1886]

yes, you should create quorum witness as best practice. If you do not have quorum witness, there will be 50% probability that your whole cluster fails when one node goes down. Please refer below official doc: learn.microsoft.com/en-us/azure-stack/hci/concepts/quorum#examples

[@riazkm9136]

@@arslanov1886thank you very much for the prompt and detailed reply. our environment is on a vxrail. what will be the best witness to use? will a file share witness created on a nas storage work. have you got any good videos for configuring the windows failover cluster. if yes, please share.

[@arslanov1886]

As long as you have a constant and stable network between your servers and witness, you can choose any type of witness. There are other small points. Please refer below: learn.microsoft.com/en-us/windows-server/failover-clustering/manage-cluster-quorum#witness-configuration Please make sure that the witness is in another server. I do not have videoes but I would follow the below good docs: Step 1 learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/failover-cluster-instance-prepare-vm?view=azuresql&tabs=single-subnet Step 2 learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/failover-cluster-instance-azure-shared-disks-manually-configure?view=azuresql