Identify the possible losses incurred if each business function (individually) were interrupted.Identify the business functions of various departments and their priority.You should consider the following steps during the BIA: To define the priority level of the applications for the business, you need to perform a Business Impact Analysis (BIA), a systematic process to determine and evaluate the potential effects of an interruption to critical business operations as a result of a disaster. If critical applications must be up and running within 15 minutes, RTO must meet the requirement.įirst thing to define during the design of the backup strategy is the MTD at the application level, that is the total amount of time you can spend on recovery and health check. Some companies that operate 24/7 can have an RTO under an hour or aiming at zero, others can afford hours or days of downtime. RTO requirements are strictly related to the business.
The backup design can be outlined as follow: It's the time that your company can spend verifying the consistency of the data after recovery. 4 hours) and MTD(Maximum Tolerable Downtime).
RTO is often used along with terms RPO (Recovery Point Objective) that is the acceptable amount of data that a company can afford to lose between the latest VM backup and the time of the VM crash (i.e. RTO depends on business needs and a disaster recovey plan must consider this factor. It refers to maximum amount of time that can be spent recovering systems after a crash or how long you can do without certain services or applications before you lose more money than you can afford. When we talk about backup, we talk about RPO, RTO, Replicas, Disaster Recovery and so on. It is important to keep in mind the terms and the concepts used in backup strategies. Not all businesses can afford such expenses and for a good design you need to find balance between affordability and reliable data protection. The Recovery Time Objective (RTO) is a key point of the backup strategy design and configuration and it is essential to know how to calculate RTO to ensure the lowest downtime for your applications and services.Ĭompanies asking for a zero RTO with minimum expenses it is a quite common situation, but to achieve such result are required big investments and a completely redundant environment.
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