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[Bug 1220359] Re: High numbers of revocation events cause excessive cache churn

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Wed, 02 Oct 2013 11:34:03 -0000
Reply-to: Bug 1220359 <1220359@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: keystone
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1220359

Title:
  High numbers of revocation events cause excessive cache churn

Status in OpenStack Identity (Keystone):
  Fix Released

Bug description:
  Due to the explicit refresh on the revocation list cache, when a
  revocation event occurs there is an added extra load to the Keystone
  processes.  This should be changed to an invalidate of cache to ensure
  that we do not have to regenerate the revocation_list except on actual
  demand.  This reduces overall lock contention when using memcache /
  redis / external storage as the cache layer.

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