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  1. Data Foundation Bugs
  2. DFBUGS-597

[2257748] [ODF Hackaton] Documentation is missing capacity planning required for single replica pool

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Critical Critical
    • odf-4.15
    • odf-4.14
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      Describe the issue:
      There is a new feature in ODF4.14 called "ALLOW STORAGE CLASSES TO USE NON RESILIENT POOL SINGLE REPLICA" (still in TP phase).
      There is nothing stating the real implication for the capacity needed when deploying this feature.

      Describe the task you were trying to accomplish:

      Suggestions for improvement:
      With regard to capacity/space needed for the reader of the documentation, it should be wise to highlight how much more capacity in terms of disks-volumes-osds will be required.

      For example:
      a) an environment with 3xODF dedicated nodes each with 1xOSD, the total number of disks-volumes will be 6.
      Explanation: 3 OSDs for the replica-3 standard pool + 1 OSD for each ODF node individual.
      b) an environment with 6xODF dedicated nodes each with 1xOSD (2 ODF nodes per zone-topology), the total number of disks-volumes will be 12.
      Explanation: 6 OSDs for the replica-3 standard pool + 1 OSD for each ODF node individual.

      Document URL:
      https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.14/html-single/4.14_release_notes/index#allow_storage_classes_to_use_non_resilient_pool_single_replica

      Currently, though this feature is in TP but mentioned sometimes (in ReleaseNotes, in Deployment docs for diverse envs-scenarios), this important information of the current real space needed for the user/admin/operator/architect reader is missing.

      Chapter/Section Number and Title:

      Product Version:
      ODF4.14

      Environment Details:

      Any other versions of this document that also needs this update:

      Additional information:
      This note should be present when this feature comes GA.

              edonnell@redhat.com Erin Donnelly
              rh-ee-jbareapa Javier Barea Palma
              Neha Berry Neha Berry
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                Created:
                Updated: