Speaker: So now let's talk about EBS Multi-Attach
and this is for the io1 and io2 family.
So I told you that an EBS volume can be attached
to only one EC2 instance
and that is true except for EBS Multi-Attach.
So this feature gives you the ability
to attach the same EBS volume to multiple EC2 instances
within the same availability zone.
So let's do a diagram.
Say we have three EC2 instances
and we have an io2 volume with Multi-Attached enable.
Then we can attach this volume to one, two,
even three EC2 instances at a time.
And each EC2 instance, we'll have full read
and write permissions to the volume.
So the use case for this is that
if you need to have a higher application availability
in a clustered Linux application, for example, Teradata.
So it's not for every kind of application,
and the application must be able
to manage concurrent write operations into the same volumes.
So this is only
for a very specific types of workloads, and again,
only for a very specific types of EBS volumes as well.
So for this, you must use a file system that is not,
that is cluster-aware, sorry.
So this is not going to be XFS or EX4,
these kind of things,
needs to be a special kind of file system.
So just know that this capability exists at the exam.
You can attach an EBS form
to multiple EC2 instances,
only if it is part of the io1 and io2 family.
Okay. That's it for this, for your lecture.
I will see you in the next lecture.