Hi phracktle, Posts like this may be better suited to the google-appengine group, since they're not Java specific.
On Thu, Feb 4, 2010 at 7:29 PM, phraktle <phrak...@gmail.com> wrote: > Hi, > > Can the Google team please shed some light on the issue of multiple > datacenters in various geographical locations pertaining GAE? I would > like to understand what characteristics and what level of guarantees > to expect from a GAE app, and didn't find any docs or posts on this... > > 1. Is static content delivered by a geographically distributed CDN? > Would make sense for latency and international bandwidth costs. > If you specify caching settings, yes, your content may be cached at the edges of our network. > > 2. Does GAE launch VMs of a single app in multiple datacenters? Same > as above - latency would be quite bad for some geographical locations > without this. > No, currently we're single-homed, with failover. > > 3. If VMs are distributed, what's the deal with memcache? If it's > distributed, does/can it split into distinct partitions? How does that > affect atomic operations, such as increment, or things like grabTail? > > 4. If there's geographical distribution, how does it affect Datastore > performance and latencies? > > My current (disappointing) impression based on latencies is that GAE > VMs are not geographically distributed, based on the latencies. But > would be good to get some clear information on this. > > In general, it would be quite useful to be able to monitor VMs better, > eg. how many VM launches took place, where. This would provide more > insight into the operation and performance of the app... (This may > also be a stepping stone toward the "pay to keep some VMs warm" topic, > an often requested feature - at least we could see ) > > Thanks, > Viktor > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > google-appengine-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > -- Nick Johnson, Developer Programs Engineer, App Engine Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: 368047 -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
