I thought HRD was supposed to solve the bad neighbor problem. As I read somewhere (don't have the reference handy right now), when your app issues a read request, it's sent to multiple datastore replicas in parallel and the app takes the data from whichever datastore replies first.
On Fri, Mar 16, 2012 at 8:26 PM, Daniel Kramer <[email protected]>wrote: > Interesting, I hadn't though about it that way. Thanks for the info > > On Mar 16, 2012, at 5:54 PM, vlad wrote: > > Daniel keep in mind that you data is still co-hosted with dozens or > hundreds on other apps on the same physical node. That is what makes > performance volatile not M/S vs HRD. HRD did solve the problem for writes > somewhat but not for reads. Fundamentally if an app which runs on the same > node is really active *your* app's performance will suffer. So it is dump > luck. Since you got a new appid when migrating you got new "neighbors" so > to speak - apps which share bigtable node with your app. > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/google-appengine/-/7NEAU3WOrG8J. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
