![]() ![]() If one of these VM instances has a problem, customers continue to access your application through one of the other VM instances with minimal interruption. Scale sets are used to run multiple instances of your application.Provides high availability and application resiliency Scale sets support the use of the Azure load balancer for basic layer-4 traffic distribution, and Azure Application Gateway for more advanced layer-7 traffic distribution and TLS termination.This approach lets you easily manage hundreds of VMs without extra configuration tasks or network management. With scale sets, all VM instances are created from the same base OS image and configuration.For reliable performance of your application, the VM size, disk configuration, and application installs should match across all VMs. When you have many VMs that run your application, it's important to maintain a consistent configuration across your environment.Scale sets provide the following key benefits: To keep up with extra customer demand, you may need to increase the number of application instances that run your application.Īzure Virtual Machine Scale Sets provide the management capabilities for applications that run across many VMs, automatic scaling of resources, and load balancing of traffic. If you need to perform maintenance or update an application instance, your customers must be distributed to another available application instance. Customers may access your application through a load balancer that distributes requests to one of the application instances. ![]() To provide redundancy and improved performance, applications are typically distributed across multiple instances. The orchestration mode is defined when you create the scale set and cannot be changed or updated later. Learn more about the differences between Uniform scale sets and Flexible scale sets in Orchestration Modes.
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