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OpenStack: What is the difference between "keystone user-create" and "keystone tenant-create" commands ?

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OpenStack: What is the difference between "keystone user-create" and "keystone tenant-create" commands ?
posted Oct 11, 2017 by Harshita

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What kind of different output came out from these two commands and what is the significance of each field of the output ?

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What is the difference between:

  1. using "the Command-line interface to the OpenStack APIs" through the command "openstack"
    and
  2. using the separate APIs of the different components (for example using the command-line interface to the Neutron APIs directly)?

Advantages and disadvantages?

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I configured nova.conf file with:
cpu_allocation_ratio=16.0
ram_allocation_ratio=1.5
specifying CoreFilter in scheduler_default_filters.
After this configuration i can't see the overcommitment results in the CLI or in Horizon.
Why? Any tips?

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