This feature is available from CLI version 1.38.2
The roll_out_duration_seconds parameter in the [cerebrium.scaling] section of your cerebrium.toml file controls how quickly traffic transitions between revisions after a successful build.

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Overview

When you deploy a new version of your app, Cerebrium creates a new revision. The roll_out_duration_seconds parameter determines how long it takes to transition traffic from the old revision to the new one. Traffic is shifted in 5 batches of 20% each, over the specified duration. This gradual transition helps ensure a smooth user experience and minimizes disruptions.

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Configuration

Add the roll_out_duration_seconds parameter to the [cerebrium.scaling] section of your cerebrium.toml file: 
[cerebrium.scaling]
roll_out_duration_seconds = 0  # Default value

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Parameters

  • Valid range: 0-600 seconds
  • Default value: 0 (immediate transition)

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Best Practices

  • Development environments: Keep the value at 0 during development for immediate transitions
  • Production environments: Use lower values to optimize cost and resources while ensuring smooth transitions
  • High-traffic applications: Consider using higher values for gradual transitions to minimize disruption