EFS

Question 1

How much throughput does Provisioned Throughput support?

Answer 1

up to 10 GiB/s of read throughput and 3 GiB/s of write throughput

But keep in mind that this is $60k/month

Question 2

What is the cost saving option customers select

Answer 2

One Zone IA, bursting, and general purpose.

Question 3

What is the performance option customers select

Answer 3

Standard, bursting, and Max I/O

Question 4

How often can I change EFS throughput mode

Answer 4

once every 24 hours.

Question 5

How many AZ’s is standard deployed to

Answer 5

multiple AZ’s, >=3

Question 6

Can I switch between one zone and standard

Answer 6

You cannot switch an existing file system that uses Standard storage to one that uses One Zone storage.

Question 7

What is Elastic throughput mode designed for

Answer 7

Use this mode for workloads with unpredictable I/O. With Elastic mode, your throughput scales automatically and you only pay for what you use. Or for applications that drive throughput at 5% or less of the peak throughput on average (the average-to-peak ratio)

Question 8

What are the two options for Enhanced throughput mode

Answer 8

Elastic and Provisioned

Question 9

What is bursting throughput mode designed for

Answer 9

Provides throughput that scales with the amount of storage for workloads with basic performance requirements.

Question 10

What is general purpose performance mode designed for

Answer 10

Ideal for a variety of diverse workloads, including high performance and latency-sensitive applications

Question 11

What is Max I/O performance mode designed for

Answer 11

Designed for highly parallelized workloads that can tolerate higher latencies

Question 12

How many IOPS does general purpose support

Answer 12

Up to 35,000

Question 13

What is a nuance with EFS pricing

Answer 13

Read throughput is discounted to allow you to drive higher read throughput than write throughput

Question 14

Are there separate performance metrics for read and write

Answer 14

No, your file system can achieve a combined 100% of its read and write throughput. For example, if your file system is using 33% of its read throughput limit, the file system can simultaneously achieve up to 67% of its write throughput limit. You can monitor your file system’s throughput usage in the Throughput utilization (%) graph on the on the File System Detail page of the console

Question 15

What is Provisioned throughput mode designed for

Answer 15

Use this mode if you can estimate your workload’s throughput requirements. With Provisioned mode, you configure your file system’s throughput and pay for throughput provisioned.

Question 16

What happens if I exceed my provisioned throughput capacity

Answer 16

then it automatically uses the Bursting Throughput allowed for the file system (up to the prevailing Bursting baseline throughput limits in that AWS Region).

Question 17

For bursting throughput, how is throughput determined and what about credits

Answer 17

the base throughput is proportionate to the file system’s size in the EFS Standard storage class, at a rate of 50 KiBps per each GiB of storage. Burst credits accrue when the file system consumes below its base throughput rate, and are deducted when throughput exceeds the base rate.

When burst credits are available, a file system can drive throughput up to 100 MiBps per TiB of storage, up to the Amazon EFS Region’s limit, with a minimum of 100 MiBps. If no burst credits are available, a file system can drive up to 50 MiBps per TiB of storage, with a minimum of 1 MiBps.

Question 18

Can I burst more for reads or writes

Answer 18

Reads at a rate of x3

Question 19

How quickly do I accumulate bursting credits

Answer 19

The baseline rate is 50 MiBps per tebibyte [TiB] of storage (equivalent to 50 KiBps per GiB of storage)