Use An EC2 Fleet Of Type 'instant' - Amazon Elastic Compute Cloud

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Increase the availability of Spot Instances. By using an EC2 Fleet of type instant, you can launch Spot Instances following Spot best practices with the resulting benefits:

  • Spot best practice: Be flexible about instance types and Availability Zones.

    Benefit: By specifying several instance types and Availability Zones, you increase the number of Spot capacity pools. This gives the Spot service a better chance of finding and allocating your desired Spot compute capacity. A good rule of thumb is to be flexible across at least 10 instance types for each workload and make sure that all Availability Zones are configured for use in your VPC.

  • Spot best practice: Use the price-capacity-optimized allocation strategy.

    Benefit: The price-capacity-optimized allocation strategy identifies instances from the most-available Spot capacity pools, and then automatically provisions instances from the lowest priced of these pools. Because your Spot Instance capacity is sourced from pools with optimal capacity, this decreases the possibility that your Spot Instances will be interrupted when Amazon EC2 needs the capacity back.

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