Problem Definition

Users have requested the ability to have a parallel set within another parallel set.

The use case is:

• running infrastructure steps and application steps in parallel
• both streams have sequential and parallel steps

The following feature request concerns having sequential steps within a parallel set: https://jira.atlassian.com/browse/BCLOUD-19908

This feature request is for the ability to have a parallel set of steps in a parallel stream

Suggested Solution

The solution would be the ability to do something like the following:

pipelines:
  default:
    - parallel:
      - stream-infrastructure:
        - step: *step-one (sequential)
        - step: *step-two (sequential)
        - parallel:
          - step: *step-three
          - step: *step-four
      - stream-application:
        - step: *step-five (sequential)
        - step: *step-six (sequential)
        - parallel:
          - step: *step-seven
          - step: *step-eight

where

• stream-infrastructure and stream-application streams will run in parallel

• within stream-infrastructure stream, step-one and step-two will run sequentially
  and step-three and step-four will run in parallel (and similarly for the steps in stream-application stream)