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Introduction
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**E2E Application scaling (EAS)** enables you to dynamically scale compute nodes based on varying workloads and a defined policy. Using this feature, you can meet the seasonal or varying demands of infrastructure while optimizing the cost. 

The core unit of EAS is a scale group. The following list covers the features and capabilities of scale groups:

    - Rule based Policy setup for adding nodes based on workload 
    - Integration with Load Balancer to automatically list or de-list backend servers
    - Automatic removal of nodes when utilization falls below a set threshold
    - SSH access to each node enables activities like log viewing, debugging etc
 
Before you :doc:`define <../define_scale_groups>` your first scale group, we recommend familiarizing yourself with :doc:`concepts and terminologies <../application_scaling_concepts>`.