How does EFA communication work?

<p>EFA devices provide all Elastic Network Adapter (ENA) devices' functionalities, plus a new OS bypass hardware interface that allows user-space applications to communicate directly with the hardware-provided reliable transport functionality. Most applications will use existing middleware, such as the Message Passing Interface (MPI), to interface with EFA. AWS has worked with a number of middleware providers to ensure support for the OS bypass functionality of EFA. Please note that communication using the OS bypass functionality is limited to instances within an Availability Zone (AZ).</p>

Which instance types support EFA?

<p>For a full list of supported EC2 instances, refer to <a href="https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/efa.html#efa-instance-types">this page</a> in our documentation.</p>

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