What is Sing Root I/O Virtualization (SR-I/OV)? What is EC2 Enhanced Networking? » –

Single Root I/OV is a feature that allows to emulate Network Interfaces on physical hosts from the EC2 Instance virtualization layer, thereby improving performance and reducing network latency of EC2 instances.

SR-I/OV is not supported in all EC2 instance families because support for this feature is hardware related.

See also: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html#supported_instances

Support for SR-I/OV helps to improve PPS (Packet per Second) network performance and is a prerequisite for Enhanced networking.

  • Enhanced Networking allows EC2-EBS backed instances and Instance store backed instances.
  • Support across AZ

Conditions for using Enhanced Networking:

  • Instance family supports SR-I/OV
  • Instance created from HVM (Hardware Virtual Machine) AMI
  • Launch from VPC

Enhanced Networking is free, but as you know, not all EC2 instance families support SR-I/OV.

To use and optimize performance, you should spend some time researching about these small features, a small adjustment but will bring unexpected effects. Launching a default AWS service in general or EC2 in particular is not always the most effective for all use cases.

Have fun!

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