NixOS/nixops — pull request #199 by dguibert (2014-06-18 09:34:26+00:00)
Title: add placement group

This patch allows to group EC2 instances for applications that benefit from low network latency, high network throughput, or both.

See http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html.