AWS: Instance Types : Instance Families : Instance Sizes : Instance Pricing : EC2

https://aws.amazon.com/ec2/instance-types/

https://aws.amazon.com/ec2/instance-explorer

Instance type	Instance   size	Hypervisor	vCPUs	Architecture	Cores	Threads   per core	Sustained   clock speed (GHz)	Memory   (GiB)	Network performance	Maximum   number of network interfaces	IPv4 addresses per interface	IPv6 addresses per interface	On-Demand   Linux pricing
c5.4xlarge	4xlarge	nitro	16	x86_64	8	2	3.4	32	Up to 10 Gigabit	8	30	30	0.68 USD per Hour
c5.2xlarge	2xlarge	nitro	8	x86_64	4	2	3.4	16	Up to 10 Gigabit	4	15	15	0.34 USD per Hour
c5.xlarge	xlarge	nitro	4	x86_64	2	2	3.4	8	Up to 10 Gigabit	4	15	15	0.17 USD per Hour
c5.large	large	nitro	2	x86_64	1	2	3.4	4	Up to 10 Gigabit	3	10	10	0.085 USD per Hour

Analytics

• Elasticsearch Service  [Amazon Elasticsearch Service]
• MSK  [Amazon Managed Streaming for Apache Kafka]

https://aws.amazon.com/ec2/instance-types/

n/w performance and Clock Speed -  may stay same  in a instance family.

Instance Family : Processor Speed /N.W Performance:  a1,t2, t3 [General Purpose]          c4, c5 [Compute Optimised]                   [Memory Optimized/RAM]           [Accelerated Computing/HW Accelerator]     [Storage Optimized/EBS]

Instance Size :  vCPU, Cores,  Memory(RAM)    :    nano, micro, small, medium, large, xlarge, 2xlarge, 4xlarge

30.5 Days

Large has 4GB RAM, 1 Core, 2 VCPUs

similarly, xlarge has 8 GB RAM, 2 Core, 4 VCPUs

n/w performance and Clock Speed -  may stay same  in a instance family.

Burst is related to EC2 Performance

Amazon EC2 allows you to choose between Fixed Performance Instances (e.g. M5, C5, and R5) and Burstable Performance Instances (e.g. T3). Burstable Performance Instances provide a baseline level of CPU performance with the ability to burst above the baseline.

New Generation is cheaper as compared to Old/deprecated - if other features stay same.