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[Craig Anderson <canderso@xxxxxxxxxxxxxx>]

Public bug reported:

In nova.conf, when configured for HA by setting the memcached_servers
parameter to several memcached servers in the nova API cluster, e.g.:

memcached_servers=192.168.50.11:11211,192.168.50.12:11211,192.168.50.13:11211

If there are memcached servers on this list that are down, the time it
takes to complete Nova API requests increases from < 1 second to 3-6
seconds.

It seems to me that Nova should protect itself from such performance
degradation in an HA scenario.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1293794

Title:
  memcached_servers timeout causes poor API response time

Status in OpenStack Compute (Nova):
  New

Bug description:
  In nova.conf, when configured for HA by setting the memcached_servers
  parameter to several memcached servers in the nova API cluster, e.g.:

  memcached_servers=192.168.50.11:11211,192.168.50.12:11211,192.168.50.13:11211

  If there are memcached servers on this list that are down, the time it
  takes to complete Nova API requests increases from < 1 second to 3-6
  seconds.

  It seems to me that Nova should protect itself from such performance
  degradation in an HA scenario.

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