My understanding (*which may be wrong; I was told this by a Google sales rep a long time ago, I vouch for nothing here*) is that all App Engine apps within NA are located within a single location for multiple reasons; for example, low latency communications between instances of an app/between multiple app ids, access to same memcache, etc.
But in cases of emergency when that datacenter is down (flood, hurricane, etc) Google can move applications to a different datacenter (for example, as they did here: https://groups.google.com/forum/#!topic/google-appengine-downtime-notify/IQjNvKp_rWU ). Data in the datastore though is replicated across different datacenters. TLDR data is replicated across locations, instances/memcache/queue/cron/etc is consolidated to a single location although they can be moved by Google's NOC. ----------------- -Vinny P Technology & Media Advisor Chicago, IL App Engine Code Samples: http://www.learntogoogleit.com On Thu, Aug 22, 2013 at 11:15 PM, Jeff Schnitzer <j...@infohazard.org>wrote: > I'm sure many of you saw this email, but I'm curious - what does it mean? > > I thought GAE was located in some number of geographically distributed > datacenters (more than 3) and a failure of any single datacenter was > immaterial to HRD apps. This email says "relocated our entire US serving > footprint to a different location within the US" as if there is only a > single datacenter involved. > > Can somebody clarify this? > > Jeff > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/groups/opt_out.
