EFS Flashcards
What technology is EFS based upon?
NFS, or Network File Store
What is EFS?
Elastic storage where you pay for what you use, in contrast to EBS where you pay whether or not you’re actually using the space.
Why is EFS not always an ideal solution?
Cost. It is 3x more expensive than EBS, and about 20x more expensive than s3. Keep this in mind for the exam.
How does EFS ensure data redundancy?>
It is replicated across all AZs in a particular region.
Are EFS mount points configurable across more than one AZ?
Yes, since EFS is replicated across all AZs, you can mount the EFS to EC2 instances across any AZ. This makes for a great multi-AZ system.
Can EFS be used on-prem?
Yes, however, it’s limited to two options:
- It requires Direct Connect
- Alternatively, you can use the EFS File Sync agent.
ou have decided to use EFS for sharing files across many EC2 instances and you want to be able to tolerate an AZ failure. You should:
Create EFS mount targets in each AZ and configure each EC2 instance to mount the common mount target FQDN