open-nomad/website/content/docs/job-specification/scaling.mdx

---
layout: docs
page_title: scaling Stanza - Job Specification
sidebar_title: scaling
description: The "scaling" stanza allows specifying scaling policy for a task group
---

# `scaling` Stanza

<Placement groups={['job', 'group']} />

The `scaling` stanza allows configuring scaling options for a task group, for the purpose
of supporting external autoscalers like the [Nomad Autoscaler](https://github.com/hashicorp/nomad-autoscaler)
and scaling via the Nomad UI. This stanza is not supported within jobs of type `system`.

```hcl
job "example" {
  datacenters = ["dc1"]
  group "cache" {
    task "redis" {
      driver = "docker"
      config {
        image = "redis:3.2"
      }
    }
    scaling {
      enabled = true
      min = 0
      max = 10
      policy {
      }
    }
  }
}
```

## `scaling` Parameters

- `min` - <code>(int: nil)</code> - The minimum acceptable count for the task group.
  This should be honored by the external autoscaler. It will also be honored by Nomad
  during job updates and scaling operations. Defaults to the specified task group [count][].

- `max` - <code>(int: &lt;required&gt;)</code> - The maximum acceptable count for the task group.
  This should be honored by the external autoscaler. It will also be honored by Nomad
  during job updates and scaling operations.

- `enabled` - <code>(bool: false)</code> - Whether the scaling policy is enabled.
  This is intended to allow temporarily disabling an autoscaling policy, and should be
  honored by the external autoscaler.

- `policy` - <code>(map<string|...>: nil)</code> - The autoscaling policy. This is
  opaque to Nomad, consumed and parsed only by the external autoscaler. Therefore,
  its contents are specific to the autoscaler; see autoscaler documentation.

[count]: /docs/job-specification/group#count 'Nomad Task Group specification'