Datomic Documentation
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Reserved Instances

The ongoing cost of running Datomic EC2 instances can be reduced by purchasing AWS Reserved Instances (RIs).

Once you have reviewed growing your system, you can purchase Reserved Instances for the EC2 instances types used in your system. AWS will automatically apply the purchased RI discount to your infrastructure (EC2) cost for any instances matching the purchased RI attributes.

Determining Instance Sizes

Standard RIs are purchased for a specific EC2 instance type. You can determine the type(s) and quantities of EC2 instances your Datomic system uses by searching for the keyword 'datomic' in your EC2 Console:

instanceTypesRI.png

Note the instance type(s) and number of instances running in your system. You can purchase RIs for any or all of the Datomic system instances.

Purchasing Reserved Instances

the "Purchase Reserved Instances" button:

purchaseRI.png

  • In the popup dialog, enter your desired RI search parameters and click the "Search" button.
  • The example below demonstrates searching for RIs for t3.small instances for a 12-month term:

searchRI.png

Generally, options with higher upfront costs provide greater hourly discounts.

RIs will be automatically applied to running instance(s) matching the purchased RI attributes.

Reference

Additional options for purchasing and applying RIs are on the Reserved Instances guide.