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This step focuses on choosing the type of backup for an on-premises Exchange Server.
Step 2: Choose the Exchange backup strategy Your backup size should be less than 1.2TB. 1.5 hours to back up and restore 300GB data, and the SLA is six hours. RTO also helps in determining the “backup size” you should consider against the SLA. The RTO is defined in seconds, minutes, days, etc., and is crucial for Exchange disaster recovery planning. RTO constitutes a vital component of the SLA to restore the system and provides useful inputs to define the backup and restore processes. This is the “maximum time allowed” to restore the Exchange services and mailbox database after a disaster event. So, it provides essential input for defining the “backup frequency and schedule.” This would also involve other mechanisms like high availability to counter data loss or reduce the data loss period. The RPO establishes the maximum amount of data your organization can afford to lose in case of a disaster. Therefore, to be successful, you should be able to restore the Exchange database and other critical services to their particular state at 1:00 AM.
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For example, if you take a daily full back up at 1:00 AM and the failure happens at 5:00 a.m., the RPO is 1:00 a.m. This is the “point in time” before the disaster event to which the server state and operations can be restored in case of a failure event. This step will help you to meet the end goal as per the defined timeline (SLA) and database state as per your organization’s standards: Step 1: Define the success metrics for disaster recoveryīefore planning out the recovery paths and mechanisms to restore critical Exchange services, you need to define the success metrics for the exercise. Here are the steps to create the Exchange Server disaster recovery plan: Before you commence planning, be aware that any Disaster Recovery program focuses on restoring the “critical services.” So it would be best if you began with identifying the Exchange Server critical services, dependencies, and data, to restore the essential services in your organization. This article presents detailed step-by-step planning guidance for Exchange Server disaster recovery. However, the Service Level Agreements (SLA) of these provisions depends upon diligent planning and testing for “on the ground” responsiveness and feasibility. Thankfully, there are provisions, including the built-in Exchange Server features and configurability options, backup and recovery solutions, and third-party tools to address such disasters.
Such crisis-like situations are placed under the “Exchange Disaster” category and are amongst the biggest worries of any Exchange Server administrator.
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Exchange Server administrators have to deal with various downtime situations, ranging from planned outages for maintenance and upgrade to unplanned downtime due to the failure of a disk, server, database, or network.įurther, situations involving large-scale disruption of critical Exchange services across an entire site or data center can lead to prolonged outages with no defined SLA for restoration.