Changes to the Well Architected FrameworkThe most notable change is that the number of pillars that the framework is based on has increased from four to five. Security, Reliability, Performance Efficiency & Cost Optimisation are joined by the all new Operational Excellence pillar. Operational Excellence focuses on an organisations ability to deliver business value. By collecting the metrics which align to business objectives, or continually delivering small changes rather than large batches of changes. As well as improving process and procedures such as:
- testing for unexpected events
- learning from operational events and failures
- ensuring that your processes and documentation is up-to-date.
How to achieve operational excellenceIt splits the best practise areas for Operational Excellence into three:
- Preparation - as the old adage goes, fail to prepare: prepare to fail - and the cloud is no different. Do you have your runbooks (which define how your day to day operations should function) and your playbooks (provide guidance on how to respond to operational events) defined, up to date and tested.
- Operations - should be automated and thus standardised. Where changes are required they should be small, and more frequent with defined processes to track, audit, review and roll-back change. They should not require downtime and should not require manual intervention.
- Responses - to all events, expected or not, should be timely and automated. Not just alerting, but also mitigation, mediation, rollback and recovery. These should be as per the defined run and play books and include automated escalations to ensure the right people understand what's happening at every stage.
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