Estimating the logical capacity by specifying the number of storage nodes and drives and the tolerable number of drive failures (Cloud)

Virtual Storage Platform One SDS Block Storage Administrator Guide
Version
1.17.x
Audience
anonymous
Part Number
MK-24VSP1SDS002-04

Obtain estimation information of the storage pool capacity. You can obtain the estimation information by specifying the number of storage nodes comprising a storage cluster, the number of drives, and the number of drive failures that can be tolerated.

  • estimatedPoolCapacityInTiB: Capacity estimation result [TiB]. If logical capacity cannot be configured, null is output.

  • differenceCapacityInTiB: Difference between the current logical capacity and estimatedPoolCapacityInTiB [TiB]. If logical capacity cannot be configured, null is output.

  • numberOfStorageNodes: Number of storage nodes that was specified.

  • numberOfDrives: Number of drives for each storage node that was specified.

  • numberOfTolerableDriveFailures: Number of drive failures that can be tolerated in the specified configuration.

Tip:

When the storage cluster is in Multi-AZ configuration, specify the number of storage nodes excluding the tiebreaker node.

  • Required role: Storage or Monitor

  1. Verify the ID of the storage pool for which capacity estimation is to be performed.

    REST API: GET /v1/objects/pools

    CLI: pool_list

  2. Run the following command.

    Run the command by specifying the storage pool ID and the parameters for capacity estimation (numberOfStorageNodes, numberOfDrives, and numberOfTolerableDriveFailures).

    REST API: GET /v1/objects/pools/<id>/estimated-capacity-for-specified-configuration

    CLI: estimated_capacity_for_specified_configuration_show

    Note:

    If you run the commands in an environment in which the Floating base license is not applied, the job will be unsuccessful.