Thanks for the video! In my view the difference between the HA and FT is that with HA, the failure of an element can be quickly recovered from (within the agreed SLA), while in FT system, the failure should not cause service interruption. From this video it almost seems like the difference is mainly in the number of component that may fail and in failure domains, while I think it is more in the effects of the failure.
I think the key line in this was "A fault tolerant system is intrinsically highly available, but a highly available system is not necessarily fault tolerant" - every explanation I was getting kept blurring the lines on that so much because they'd say it like, yes it it this - but it isn't, and didn't seem to want to confirm that link. Thanks!
Great video boss. I have a question, Using your example of an ELB with 2 ec2 instances in 2 different AZ, can the infrastructure also be fault tolerant if we added an ASG to the ELB just in case one of the ec2 instances go down the ASG can just spin up another ec2 instance?
Hi Lawrence, yes that's a good point, you could certainly use Auto Scaling here and I recommend you always use ASG with ELBs as additional levels to enhance both FT and HA!
Thanks for the video! In my view the difference between the HA and FT is that with HA, the failure of an element can be quickly recovered from (within the agreed SLA), while in FT system, the failure should not cause service interruption. From this video it almost seems like the difference is mainly in the number of component that may fail and in failure domains, while I think it is more in the effects of the failure.
I think the key line in this was "A fault tolerant system is intrinsically highly available, but a highly available system is not necessarily fault tolerant" - every explanation I was getting kept blurring the lines on that so much because they'd say it like, yes it it this - but it isn't, and didn't seem to want to confirm that link. Thanks!
Great video boss. I have a question, Using your example of an ELB with 2 ec2 instances in 2 different AZ, can the infrastructure also be fault tolerant if we added an ASG to the ELB just in case one of the ec2 instances go down the ASG can just spin up another ec2 instance?
Hi Lawrence, yes that's a good point, you could certainly use Auto Scaling here and I recommend you always use ASG with ELBs as additional levels to enhance both FT and HA!
Great explanation !
Nice explanation , thanks
Excellent bro
Thank you Angel, I hope it helped! Cheers!