google did not invent the hr for fun, with very busy sites it is possible that ms reads give high latency because it is less replicated then hr. Also it seems (i'm not sure) there are upcoming changes in the datastore api to introduce more ascync https://docs.google.com/a/google.com/document/d/1hJI0Jk4vQMIoyrfqFpWhYODHXBtxpMHHeR2hjQ9NyXY/edit?ndplr=1&pli=1#heading=h.4f9cvg1w9hgn <https://docs.google.com/a/google.com/document/d/1hJI0Jk4vQMIoyrfqFpWhYODHXBtxpMHHeR2hjQ9NyXY/edit?ndplr=1&pli=1#heading=h.4f9cvg1w9hgn>keep your models as simple as possible and use where possible only the properties mented in this document (faster) (be aware with the reference key) <https://docs.google.com/a/google.com/document/d/1hJI0Jk4vQMIoyrfqFpWhYODHXBtxpMHHeR2hjQ9NyXY/edit?ndplr=1&pli=1#heading=h.4f9cvg1w9hgn>
2011/3/1 mscwd01 <mscw...@gmail.com> > Thanks for your feedback, I'm siding towards Master/Slave due to the > performance and cost advantages it has over HR. Am I right in thinking > if reliability did become an issue in the future I could just use the > bulk loader to download and re-upload my data to a new app? I think > this would be a reasonable plan. > > On Mar 1, 12:15 pm, Wim den Ouden <wdenou...@gmail.com> wrote: > > Busy site? hr, it remains available for reads and writes during planned > > downtime and is extremely resilient in the face of catastrophic failure > > > > 2011/3/1 mscwd01 <mscw...@gmail.com> > > > > > > > > > > > > > > > > > > > > > I've done my research but still cant fully decide whether to use the > > > High Replication or Master/Slave datastore. Hypothetically speaking, > > > if my app were to become popular it would require many reads and > > > writes (it's an advert serving platform). > > > > > I realise the High Replication datastore uses more resources, is > > > slower reading and writing and would be more costly, but it does have > > > the reliability I need. On the contrary the Master/Slave is faster > > > which is important to me. > > > > > Basically, what is the opinion of people who have used both in a > > > production environment? Should I stick with Master/Slave or make the > > > change before it's too late? > > > > > Thanks > > > > > -- > > > You received this message because you are subscribed to the Google > Groups > > > "Google App Engine" group. > > > To post to this group, send email to google-appengine@googlegroups.com > . > > > To unsubscribe from this group, send email to > > > google-appengine+unsubscr...@googlegroups.com. > > > For more options, visit this group at > > >http://groups.google.com/group/google-appengine?hl=en. > > > > -- > > gr, > > Wim den Ouden > > Custom Google App Engine <http://code.google.com/intl/nl/appengine/> > based > > webapps <https://neighborshare.appspot.com/>. > > Free open source neighborshare framework < > http://code.google.com/p/relat/>. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appengine@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > -- gr, Wim den Ouden Custom Google App Engine <http://code.google.com/intl/nl/appengine/> based webapps <https://neighborshare.appspot.com/>. Free open source neighborshare framework <http://code.google.com/p/relat/>. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
