Microsoft Access Database Naming Conventions Best' title='Microsoft Access Database Naming Conventions Best' />Resiliency checklist Microsoft Docs.Designing your application for resiliency requires planning for and mitigating a variety of failure modes that could occur.Review the items in this checklist against your application design to improve its resiliency.Perform a failure mode analysis FMA for your application.FMA is a process for building resiliency into an application early in the design stage.For more information, see Failure mode analysis.The goals of an FMA include Identify what types of failures an application might experience.Capture the potential effects and impact of each type of failure on the application.Identify recovery strategies.Deploy multiple instances of services.If your application depends on a single instance of a service, it creates a single point of failure.MS Paint, the first app you used for editing images, will probably be killed off in future updates of Windows 10, replaced by the new app Paint 3D.Microsoft lists. InformationWeek.News, analysis and research for business technology professionals, plus peertopeer knowledge sharing.Engage with our community.Rebuilding a database when it likely has poor naming conventions, missing data relationships, and a complete lack of referential integrity requires a DBA with the.Provisioning multiple instances improves both resiliency and scalability.For Azure App Service, select an App Service Plan that offers multiple instances.For Azure Cloud Services, configure each of your roles to use multiple instances.For Azure Virtual Machines VMs, ensure that your VM architecture includes more than one VM and that each VM is included in an availability set.Use autoscaling to respond to increases in load.If your application is not configured to scale out automatically as load increases, its possible that your applications services will fail if they become saturated with user requests.For more details, see the following Use load balancing to distribute requests.Load balancing distributes your applications requests to healthy service instances by removing unhealthy instances from rotation.If your service uses Azure App Service or Azure Cloud Services, it is already load balanced for you.However, if your application uses Azure VMs, you will need to provision a load balancer.See the Azure Load Balancer overview for more details.Configure Azure Application Gateways to use multiple instances.Depending on your applications requirements, an Azure Application Gateway may be better suited to distributing requests to your applications services.However, single instances of the Application Gateway service are not guaranteed by an SLA so its possible that your application could fail if the Application Gateway instance fails.Provision more than one medium or larger Application Gateway instance to guarantee availability of the service under the terms of the SLA.Use Availability Sets for each application tier.Placing your instances in an availability set provides a higher SLA.Consider deploying your application across multiple regions.If your application is deployed to a single region, in the rare event the entire region becomes unavailable, your application will also be unavailable.This may be unacceptable under the terms of your applications SLA.If so, consider deploying your application and its services across multiple regions.A multi region deployment can use an active active pattern distributing requests across multiple active instances or an active passive pattern keeping a warm instance in reserve, in case the primary instance fails.We recommend that you deploy multiple instances of your applications services across regional pairs.For more information, see Business continuity and disaster recovery BCDR Azure Paired Regions.Use Azure Traffic Manager to route your applications traffic to different regions.Azure Traffic Manager performs load balancing at the DNS level and will route traffic to different regions based on the traffic routing method you specify and the health of your applications endpoints.Microsoft Access Database Naming Conventions Best' title='Microsoft Access Database Naming Conventions Best' />Without Traffic Manager, you are limited to a single region for your deployment, which limits scale, increases latency for some users, and causes application downtime in the case of a region wide service disruption.Configure and test health probes for your load balancers and traffic managers.Ensure that your health logic checks the critical parts of the system and responds appropriately to health probes.The health probes for Azure Traffic Manager and Azure Load Balancer serve a specific function.For Traffic Manager, the health probe determines whether to fail over to another region.For a load balancer, it determines whether to remove a VM from rotation.TTrrISddMk/T7dcWN5sWWI/AAAAAAAAAXg/imaLTGa_O1E/s1600/Physical+Name+Mgmt+Studio.png' alt='Microsoft Access Database Naming Conventions Best' title='Microsoft Access Database Naming Conventions Best' />For a Traffic Manager probe, your health endpoint should check any critical dependencies that are deployed within the same region, and whose failure should trigger a failover to another region.For a load balancer, the health endpoint should report the health of the VM.Dont include other tiers or external services.Otherwise, a failure that occurs outside the VM will cause the load balancer to remove the VM from rotation.For guidance on implementing health monitoring in your application, see Health Endpoint Monitoring Pattern.Monitor third party services.If your application has dependencies on third party services, identify where and how these third party services can fail and what effect those failures will have on your application.A third party service may not include monitoring and diagnostics, so its important to log your invocations of them and correlate them with your applications health and diagnostic logging using a unique identifier.For more information on proven practices for monitoring and diagnostics, see Monitoring and Diagnostics guidance.Ensure that any third party service you consume provides an SLA.If your application depends on a third party service, but the third party provides no guarantee of availability in the form of an SLA, your applications availability also cannot be guaranteed.Your SLA is only as good as the least available component of your application.Implement resiliency patterns for remote operations where appropriate.If your application depends on communication between remote services, follow design patterns for dealing with transient failures, such as Retry Pattern, and Circuit Breaker Pattern.For more information, see Resiliency strategies.Implement asynchronous operations whenever possible. Download Bounce Boing Voyage For Pc . Synchronous operations can monopolize resources and block other operations while the caller waits for the process to complete.Design each part of your application to allow for asynchronous operations whenever possible.For more information on how to implement asynchronous programming in C, see Asynchronous Programming with async and await.The following checklist items apply to specific services in Azure.
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