2 Amazon EBS Block Storage Free Online FlashCards

What does Amazon EBS provide to EC2 instances?

Amazon EBS provides persistent, block-level storage for EC2 instances.

Which Availability Zone can an EBS volume attach within?

An EBS volume can attach only to an EC2 instance in the same Availability Zone where the volume was created.

What should you do inside the operating system after attaching an EBS volume?

Identify the device, create a file system if needed, and mount it. Do not format a volume that already contains data.

What should you do before detaching an EBS data volume?

Unmount the volume first to reduce the risk of data loss.

What limitation must you account for when using EBS Multi-Attach?

Multi-Attach is available for supported io1 and io2 volumes with compatible instances. It does not coordinate concurrent writes; use a cluster-aware file system or suitable application.

How do IOPS and throughput differ?

IOPS measures input/output operations per second; throughput measures the volume of data transferred per second.

What are the gp3 baseline performance figures?

gp3 has a baseline of 3,000 IOPS and 125 MiB/s; both IOPS and throughput can be provisioned higher.

When are io2 or io1 provisioned IOPS volumes a good fit?

io2 and io1 provide provisioned IOPS for sustained, intensive I/O. They suit I/O-intensive databases and latency-sensitive transactional workloads.

What workload pattern suits st1, and what is it unsuitable for?

st1 is designed for large, sequential I/O and throughput-oriented workloads, such as log processing. It is not suitable as a boot volume.

What is sc1 designed to store?

sc1 is a lower-cost HDD for infrequently accessed, throughput-oriented data. It is not suitable as a boot volume.

How do successive EBS snapshots store volume data?

The first snapshot is full; later snapshots of that volume are incremental and store blocks changed since the previous snapshot.

How can you use EBS volume data in another Availability Zone?

Create a snapshot, then create a volume from it in the destination Availability Zone.