yahoo-eng-team team mailing list archive

["Markus Zoeller \(markus_z\)" <mzoeller@xxxxxxxxxx>]

This wishlist bug has been open a year without any activity. I'm going
to move it to "Opinion / Wishlist", which is an easily-obtainable queue
of older requests that have come on.

** Changed in: nova
       Status: Confirmed => Opinion

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https://bugs.launchpad.net/bugs/1410003

Title:
  Performance Issue on Nova API  about Nova Quota Usage

Status in OpenStack Compute (nova):
  Opinion

Bug description:
  We have a requirement to collect quota usage information at project level with admin role account. We noticed that the only api we can work with currently is to get them one by one:
  Request: GET     /v2/{tenant_id}/limits/?tenant_id={tenant_id}
  Refer to:
  http://docs.openstack.org/api/openstack-compute/2/content/GET_os-used-limits-for-admins-v2_getCustomerLimits__v2__tenant_id__limits__tenant_id__ext-compute_limits_admins.html

  In production env, we maintained 1K projects at least. So with this
  API, we have to get the summary with 1K http requests.(O(n), n is the
  number of projects).

  This would cause low performance if we check the quota usages
  frequently. I would hope there's an API similar to the way we did for
  instances summary(/v2/​{tenant_id}​/servers/detail?all_tenant=True)
  which is use a "all_tenants" parameter to return the summary list we
  want.

  That would totally solve the performance issue we met(O(n) -> O(1)). I just wrote a prototype to get this down and hope it would be helpful to describe the issue. Code link is here:
  https://github.com/henryzzq/nova/compare/stable/icehouse?expand=1 

  Also attached a design doc about this issue.

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