Storage - EFS

Question 1

What type of storage?

Answer 1

Supports NFSv4, POSIX-complaint file storage for EC2 instances

Question 2

What are some EFS features?

Answer 2

file system interface; strong consistency reads, and accessible from multiple EC2 instances

Question 3

Max storage size

Answer 3

unlimited system size. same as S3, but larger than EBS

Question 4

Max file size

Answer 4

47.9 TiB for a single file. Larger than S3

Question 5

Performance (lantency)

Answer 5

low, consistentet; use Max I/O mode for higher performance; ideal for latency sensitive use cases

Question 6

Performance (throughput)

Answer 6

10+ Gbps, higher than S3 and EBS

Question 7

Durability

Answer 7

Stored redundantly across multiple AZs, better than S3s EBSs single AZ, but less durability than S3

Question 8

Availability

Answer 8

Multi-AZ, 99.9%, about the same but not at good as S3, but slightly better than EBS

Question 9

Scalability

Answer 9

EFS files are elastic and automatically grow and shrink as you add an remove files

Question 10

Data accessability

Answer 10

One to thousands of EC2 instances or on premise servers have access from multiple AZs and VPNs. Better than EBS, but not as strong as S3

Question 11

Access Control

Answer 11

Only mount targets have access to a file system; POSIX-complaint and group-level permissions. S3 and EBS use IAM and bucket policies.

Question 12

Encryption

Answer 12

Data a rest with AWS KMS and data in transit with TLS

Question 13

Pricing

Answer 13

Per month bill for file storage used and when using provisioned throughput mode, you pay throughput per month.

Question 14

Use cases

Answer 14

Web serving, content management, enterprise applications, media and entertainment, home directories, database backups, developer tools and containment storage.

Question 15

Service endpoint

Answer 15

accessed with one’s VPN, same as EBS, but different as S3 can be accessed outside of the VPC.

Question 16

EC2 Access?

Answer 16

Multiple EC2 instances can access an EFS at the same time.

Question 17

How can data be migrated to EFS?

Answer 17

Using AWS datasync between on-premise to EFS

Question 18

How to schedule backups?

Answer 18

incremental backup scheduling with EFS-to-EFS backup solution

Question 19

Is there an infrequent storage option?

Answer 19

Amazon EFS Infrequent Access can transfer file that have not been accessed in more than 30 days using LCM.

Question 20

What is a mount target?

Answer 20

provided an IP address for a NFSv4 endpoint; can create one mount target in each AZ; mount file system using its DNS which will resolve to the IP address of the EFS mount target

Question 21

Why EFS over S3 and EBS?

Answer 21

Low and consistent latency better than S3, same as EBS, better throughput and durability than EBS; access is better than EBS; host a multitude of use cases