![]() Has a composite SLA been calculated for the application and/or key scenarios using Azure SLAs?Ī composite SLA captures the end-to-end SLA across all application components and dependencies. Make sure SLAs/SLOs/SLIs for all leveraged dependencies are understood. Mean Time To Recover (MTTR) - The average time it takes to restore a component after a failure.Īre SLAs/SLOs/SLIs for all leveraged dependencies understood?Īvailability targets for any dependencies leveraged by the application should be understood and ideally align with application targets.Mean Time Between Failures (MTBF) - The average time between failures of a particular component.Make sure you measure and monitor key targets such as: Monitoring and measuring application availability is vital to qualifying overall application health and progress towards defined targets. For example, if you are striving to achieve an application Service Level Objective (SLO) of 99.999%, the level of inherent operational action required by the application is going to be far greater than if an SLO of 99.9% was the goal. ![]() Understanding your availability expectations is vital to reviewing overall operations for the application. Availability targets for any dependencies leveraged by the application should be understood and ideally align with application targets should also be considered. Knowing the SLA of dependencies will also provide a justification for additional spend when making the dependencies highly available and with proper support contracts. Understanding the SLA of individual components within the system is essential in order to define reliability targets. Assess overall application health of workloads.Ī Service Level Agreement (SLA), is an availability target that represents a commitment around performance and availability of the application.Ensure connection availability and improve reliability with Azure services.Consider application and data platform requirements to improve resiliency and availability.Determine how long workloads can be unavailable and how much data is acceptable to lose during a disaster.Determine the acceptable level of uptime for your workloads.For example, how much downtime is acceptable? How much does potential downtime cost your business? What are your customer's availability requirements? How much do you invest in making your application highly available? What is the risk versus the cost? Key points In addition to these targets, there are many other requirements you should consider to improve reliability requirements and meet business expectations.īuilding resiliency (recovering from failures) and availability (running in a healthy state without significant downtime) into your apps begins with gathering requirements. Having clearly defined targets is crucial in order to have a goal to work and measure against. Target and non-functional requirements such as availability targets and recovery targets allow you to measure the uptime and downtime of your workloads.
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