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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