Disaster Recovery Strategies

Work with Business to understand business criticality , resources involved and evalaute impact.

Business Impact assesment

Based on this , which strategy to be applied is decided.

is it Regional(Multi Regional ) or zonal (multi AZ) outage??

DR Strategies

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1. Active PAssive

   1. Backup & Restore- Cold strategy- This strategy involves backing up your systems and restoring them from backup in case of disaster

      cheap one, RPO & RTO of hrs, low priorty use cases,cost $

      

   2. Pilot Light - A pilot light disaster recovery (DR) strategy keeps a minimal, essential part of an environment running in the cloud. This ensures that critical components are operational and data is continuously replicated. In the event of a disaster, the environment can quickly be scaled up to full production capacity.

      RPO/RTO of 10s 0f minutes,cost is $$

      

   3. Warm Standby This strategy involves running a full backup system in standby mode, with live data replicated from the production environment.

      RTO/RPO of minutes, cost $$$

      

2. Multi Site Active Active

   his strategy involves creating parallel infrastructure and data stores that are continuously kept in sync with production. It's the most reliable DR solution, but it's also the most complex and costly..$$$$$

   Mission critical use cases, RTO/RPO real time ,zero downtime, near zero data loss, very costly

   

When choosing a disaster recovery strategy, you can consider metrics called RTO (Recovery Time Objective) and RPO (Recovery Point Objective): 

• RTO: A measure of how quickly your application can recover after an outage, minimum acceptable data loss

• RPO: A measure of the maximum amount of data loss that your application can tolerate. minimum acceptable period of data loss.