Amazon AWS EC2 Instances with AMD 2nd gen EPYC Processors
This document also clarifies difference between Amazon cloud Ec2 instances C5a And C5ad.
as per amazon website there are C5a and C5ad instances runs on 2nd gen AMD EPYC Processors.
C5a instances feature custom 2nd generation up to 3.3 GHz AMD EPYC 7002 series processors built on a 7nm process node for increased efficiency.
https://aws.amazon.com/ec2/instance-types/c5/
C5ad Instance runs 2nd generation AMD EPYC processors running at frequencies up to 3.3 GHz. C5ad instances are variants of the recently launched C5a instances and are equipped with local NVMe-based SSD block level storage physically connected to the host server.
What is the Advantage of C5ad Over C5a instance in amazon AWS
C5ad instances provide high performance processing at 10% lower cost over comparable instances. These instances are ideal for applications that need temporary storage of data, such as batch and log processing and applications that need caches and scratch files. These instances are also a great fit for applications that need access to high-speed, low latency local storage, such as video encoding, image manipulation and other forms of media processing. With the option of NVMe-based SSD instance storage, C5a customers now have additional storage choices for their most compute-intensive workloads.
this saves lot of computing cost compared to other instances.
Local NVMe-based SSD block level storage physically connected to the host server is available on C5d and C5ad instances. These instances are a great fit for applications that need access to high-speed, low latency local storage like video encoding, image manipulation and other forms of media processing. It will also benefit applications that need temporary storage of data, such as batch and log processing and applications that need caches and scratch files.
https://aws.amazon.com/ec2/instance-types/c5/
We need to check the benefits of C5ad instance over c5a instance just with addition of NVMe based SSD as there is some price difference between both.
c5a.24xlarge $3.696 96 192 GiB EBS Only 20 Gigabit c5ad.24xlarge $4.128 96 192 GiB 2 x 1900 NVMe SSD 20 Gigabit
https://aws.amazon.com/ec2/pricing/reserved-instances/
https://aws.amazon.com/ec2/pricing/on-demand/
like if the performance of C5a is delayed waiting to write the image or video to hard disk, then we cant utilize the highly paid Instance effectively.
there is almost 11.7% price difference. that says C5ad costs lmost 12% costlier than C5a instance.
how much does C5a costs a month.
$3.696 X 24 X 30 = $2661 per month worth hours.
any way this cost does apply only for on demand applications hence we wont be using it continuously. but to understand its cost it is better to calculate. for continuous use one need to use reserved-instances as they cost up to 72% cheaper (1yr (40%), 3yr (60%))
savings also based on upfront cost.
one can extend at same cost but cant drop it off, but can sell it to others in amazon reserved instance marketplace.
now back to cost 12% of $2661 is $320 extra per month for C5ad instance. which is almost $4000 per year.
https://aws.amazon.com/ec2/purchasing-options/reserved-instances/marketplace/
C5ad instances are available today in the US East (N. Virginia), US West (Oregon), Europe (Ireland, Frankfurt), and Asia Pacific (Singapore, Sydney)
cost of c5ad instance also changes based on server location.
cost in 3-11-2021
More cheaper Instance Than C5a Instance
Amazon EC2 C6g instances costs 40% cheaper than C5a at same performance
https://aws.amazon.com/ec2/purchasing-options/reserved-instances/marketplace/
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