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Hitachi Vantara Knowledge

Understanding the erasure coding topology list

The EC Topologies page in the HCP System Management Console lists the currently defined erasure coding topologies in which the current system participates. To display this page, in the top-level menu of the System Management Console, select Services Geo-distributed EC.

For each listed erasure coding topology, the EC Topologies page shows:

  • Name

    The erasure coding topology name.

  • State

    The current state of the erasure coding topology: Active, Retiring, or Retired.

  • Protection Status

    The current status of the erasure coding topology with respect to how well-protected erasure-coded objects are: Healthy, Vulnerable, Broken, Retiring, Retired, or Unknown.

  • Read Status

    The current status of the erasure coding topology with respect to the ability to read erasure-coded objects: Healthy, Vulnerable, Broken, Retired, or Unknown.

  • Alerts

    If issues exist with the erasure coding topology, one or both of these icons:

    • GUID-BF1F61D2-3959-4DC1-A62B-C5939398AA1D-low.png

      This icon is displayed under these conditions:

      • The erasure coding topology protection status is vulnerable.
      • The erasure coding topology read status is vulnerable.
      • Replication is paused for one or more tenants on one or more replication links in the erasure coding topology. This condition is reported only for active topologies.
    • GUID-499EFF34-B983-4823-BFE5-90328E4CF16B-low.png

      This icon is displayed under these conditions:

      • The erasure coding topology protection status is broken.
      • The erasure coding topology read status is broken.
      • One or more tenants added to the erasure coding topology have not been added to one or more replication links in the topology. HCP does not report this condition for a tenant until ten minutes after the tenant was added to the topology.
      • HCP cannot find one or more replication links that are included in the erasure coding topology.

    To view text describing the condition that's causing the alert, hover over the alert icon.

 

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