Chapter 8 Quality attributes and sizing of the dXp The primary activity is to set up the DR site in a remotely located data center and set up all the synchronization jobs. The infrastructure configuration at the DR site should be an exact mirror replica of the primary site. The DR process owners set up and configure all the backup and synchronization jobs as part of setup activity. We will prepare a detailed DR test strategy to test all the DR processes and synchronization jobs. We will execute the pilot run of DR processes and measure the RTO and RPO to ensure that DR processes and their frequency are well designed. There are mainly three types of DR options available, as listed in Table 8-3. Table 8-3. Key DR options DR Option Setup and Synchronization Details Typical RPO and RTO Cold backup the dr site is prepared and set up but the data and content rpo = 24 hours option are not actively synched. the data and content will be rto = 72 hours restored from backup in the event of disaster. Warm the dr site is synced with data from the primary site in rpo = 4 hours (with backup regular intervals. in the event of disaster, the warm backup 4-hour sync jobs) option takes over. rto = 1 hour hot backup the dr site is synced with data from the primary site in near rpo = 1 hour (with option real-time. in the event of disaster, the hot backup takes over. hourly sync jobs) rto = 30 mins The DR options can be chosen based on RPO and RTO needs. The hot backup option is used for very high availability requirements and mission-critical applications that have strict RPO and RTO. The cold backup option can be used for applications that can tolerate data loss or low availability. DR Maintenance The DR processes are continuously monitored and their success/failure reports are notified to all stakeholders. Based on the changes in business objectives, the DR processes are fine tuned. The DR processes and plans are reviewed and updated at regular intervals. All DR teams are trained on the emergency operating procedures. 231