Amazon ec2 pricing note

 // on demand 

- per hour

- per second 

are ideal for short-term, irregular workloads that cannot be interrupted. No upfront costs or minimum contracts apply. The instances run continuously until you stop them, and you pay for only the compute time you use.

Sample use cases for On-Demand Instances include developing and testing applications and running applications that have unpredictable usage patterns. On-Demand Instances are not recommended for workloads that last a year or longer because these workloads can experience greater cost savings using Reserved Instances.

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// ec2 instance saving plans

1 / 3  year plan

a commitment to a consistent amount of usage measured in dollars per hour for a one or three-year term.

therefore provide savings of up to 72% on your AWS compute usage. This can lower prices on your EC2 usage, regardless of instance family, size, OS, tenancy, or AWS region. This also applies to AWS Fargate and AWS Lambda usage, which are serverless compute options that we will cover later in this course. 

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// reserved instance

steady-state workloads or ones with predictable usage and offer you up to a 75% discount versus On-Demand pricing. You qualify for a discount once you commit to a one or three-year term and can pay for them with three payment options: all upfront, where you pay for them in full when you commit; partial upfront, where you pay for a portion when you commit; and no upfront, where you don't pay anything at the beginning. 

ada 2 tipe:

- standard reserve

- convertible reserve

term berlangganan 1 taun / 3 taun.

3 taun = more discount 

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// Standard Reserved Instances: This option is a good fit if you know the EC2 instance type and size you need for your steady-state applications and in which AWS Region you plan to run them. Reserved Instances require you to state the following qualifications:

Instance type and size: For example, m5.xlarge

Platform description (operating system): For example, Microsoft Windows Server or Red Hat Enterprise Linux

Tenancy: Default tenancy or dedicated tenancy

You have the option to specify an Availability Zone for your EC2 Reserved Instances. If you make this specification, you get EC2 capacity reservation. This ensures that your desired amount of EC2 instances will be available when you need them. 

// convertible = locationnya  bisa dipindah antar AZ.

// bs convert ke different instance type size ( m5.xlarge)

Convertible Reserved Instances: If you need to run your EC2 instances in different Availability Zones or different instance types, then Convertible Reserved Instances might be right for you. Note: You trade in a deeper discount when you require flexibility to run your EC2 instances.

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// spot instances

allow you to request spare Amazon EC2 computing capacity for up to 90% off of the On-Demand price. The catch here is that AWS can reclaim the instance at any time they need it, giving you a two-minute warning to finish up work and save state. You can always resume later if needed. So when choosing Spot Instances, make sure your workloads can tolerate being interrupted. A good example of those are batch workloads. 

Spot Instances are ideal for workloads with flexible start and end times, or that can withstand interruptions. Spot Instances use unused Amazon EC2 computing capacity and offer you cost savings at up to 90% off of On-Demand prices.

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// dedicated host

Dedicated Hosts, which are physical hosts dedicated for your use for EC2. These are usually for meeting certain compliance requirements and nobody else will share tenancy of that host.

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