aws_ec2_perf

Master: Develop:

• Installation and Dependencies
• Tags
• Examples

Applies performance enhancements intended to Ubuntu Trust and Xenial based EC2 instances.

Enhancements are taken from Netflix's findings:

• https://youtu.be/89fYOo1V2pA
• https://www.slideshare.net/brendangregg/how-netflix-tunes-ec2-instances-for-performance

All enhancements are turned off by defaults, several flags are provided to turn the settings on:

Variable	Default	Description
sansible_aws_ec2_perf_clocksource_enabled	yes	Enable Clocksource fix for Trusty over Xen
sansible_aws_ec2_perf_filesystem_enabled	no	Enable Filesystem based enhancements
sansible_aws_ec2_perf_huge_pages_enabled	no	Enable Huge Page disablement
sansible_aws_ec2_perf_network_enabled	no	Enable Network based enhancements
sansible_aws_ec2_perf_numa_enabled	no	Enable NUMA balancing disablement
sansible_aws_ec2_perf_virtual_mem_enabled	no	Enable Virtual Memory swappiness disablement

Installation and Dependencies

To install run ansible-galaxy install sansible.aws_ec2_perf or add this to your roles.yml.

- name: sansible.aws_ec2_perf
  version: v1.0

and run ansible-galaxy install -p ./roles -r roles.yml

Tags

This role uses a single tage: build

• build - Installs performance enhancements, useful for baking into images

Examples

Simply include role in your playbook

- name: Install and configure aws_ec2_perf
  hosts: "somehost"

  roles:
    - role: sansible.aws_ec2_perf
      sansible_aws_ec2_perf_clocksource_enabled: yes
      sansible_aws_ec2_perf_filesystem_enabled: yes
      sansible_aws_ec2_perf_huge_pages_enabled: yes