On 2015-11-09 19:01:36 +0000 (+0000), Tom Cameron wrote: [...] > What do the user/operator surveys say about the usage of older > releases? What portion of the user base is actually on releases > prior to Havana? The most recent OpenStack User Survey Report has an awesome trending analysis answering this exact question. See page 22 (labeled 21) of https://www.openstack.org/assets/survey/Public-User-Survey-Report.pdf for a very appropriate graph. -- Jeremy Stanley