Please reply to both discussion post below with between 50-100 words:

#1 – Reserved Instance Is not physical. It provides you significant savings on your EC2

On-demand instance On-demand instance match attributes. Ones like type and region to benefit from billing discount. You pay per the time you use instead of a long-term commitment. 60 seconds is the minimum for running state.

Spot instance gives access for up to 90% off on-demand prices. You pay hourly price for spot on instance. You can request unused EC2.

Dedicated host is a physical server with EC2. Dedicated host gives you the use of your existing per-socket, per-core, or per-VM software license. Including windows server, Microsoft SQL server, SUSE, and Linux enterprise server. Dedicated host provides visibility of the number of sockets and physical cores. Some applications might need to be hosted on a dedicated server for compliance. Dedicated host does auto recover and restarts your instance on a new host when certain problematic conditions are found.

For this scenario I would say best to pay for the on-demand. This gives them the option to pay as they go. This way they pay as needed for the services.

#2 – Reserved instances these are the reserved resources and capacity for a particular period of time and is used at certain availability zone within a region , this cannot be used to used to overcome the above problem

Spot instances– means that you will be paying the prices for the resources lesser than the on-demand prices and this can be used to get the required resources but this is limited time offer .

On-demand instances these are the services that running on the demand of the customer and are required by the customer to pay the fixed rate per hour basis.

Dedicated host these gives the customer a more visibility and control over resources or instance that are placed in the physical server and easy way to manage them , this will not be of much use here.

A Spot Instance is a specialized Amazon Web Services (AWS) instance that allows you to access and utilize unused EC2 capacity at a steeply discounted rate. Amazon offers them as a means of helping EC2 users optimize their costs by capitalizing on idle EC2 capacity, instead of relying entirely on the rather costlier On-Demand Instances.

What you end up paying in return is known as a Spot Price, and itàcharged on an hourly basis for each Spot Instance.

Itàworth noting, however, that while Spot Instances tend to be cheaper than standard On-Demand Instances, their pricing rates are not fixed. Rather, they are constantly adjusted across the Availability Zones based on market demand.

Users, in the meantime, cannot rely on real-time bidding. As long as the maximum rates for your request are higher than the Spot Price, the system will run your Spot Instance whenever EC2 capacity is available.