Ah.... my bad. Somehow overlooked the fact that its StringListProperty. Thanks Nick, appreciate your help.
2010/6/16 Nick Johnson (Google) <[email protected]> > No - the MessageIndex has a list of subscribers, so you only need to create > one for every, say, 500 or 1000 subscribers. > > -Nick Johnson > > 2010/6/15 Harshal <[email protected]> > >> So essentially you are suggesting to create new MessageIndex per Message >> per subscriber. In case we happen to have 10000 subscribers, for every >> message that is posted we would create 10000 MessageIndex entities. Is that >> what you suggesting? >> >> >> >> 2010/6/16 Alkis Evlogimenos ('Αλκης Ευλογημένος) <[email protected]> >> >> Yes you can scale further. I think it is mentioned in the talk as well. >>> >>> Make MessageIndex a child of Message. >>> Add multiple MessageIndex entities per Message. >>> >>> What I would do is create a new MessageIndex per Message on each >>> subscriber. Then a cron job would periodically compact the MessageIndexes to >>> maximize the number of subscribers in each of them. >>> >>> - alkis >>> >>> >>> On Tue, Jun 15, 2010 at 10:51 PM, Harshal <[email protected]> wrote: >>> >>>> Thanks for that info. I had seen it before posting here. The way >>>> suggested there is, >>>> >>>> class Message(db.Model): >>>> >>>> sender = db.StringProperty() >>>> >>>> body = db.TextProperty() >>>> >>>> class MessageIndex(db.Model): >>>> >>>> receivers = db.StringListProperty() >>>> >>>> If this is the best we can do, then aren't we limiting no. >>>> of receivers in list to maximum 5000? so we improved from my original model >>>> where only 30 was possible to 5000. Is there a way to scale up further? or >>>> are we hitting the glass ceiling ? >>>> >>>> Another thing that comes to mind is, every time a new message is created >>>> do we need to create 5000 (assuming 5000 entries in receivers list) new >>>> instances in form of children of new Message entity? >>>> >>>> >>>> >>>> On Wed, Jun 16, 2010 at 1:01 AM, Edward Smith >>>> <[email protected]>wrote: >>>> >>>>> Check out this talk from IO 2009 - I believe it addresses your problem >>>>> using a "twitter"-like example. >>>>> >>>>> -- >>>>> 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]<google-appengine%[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]<google-appengine%[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]<google-appengine%[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]<google-appengine%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/google-appengine?hl=en. >> > > > > -- > Nick Johnson, Developer Programs Engineer, App Engine Google Ireland Ltd. > :: Registered in Dublin, Ireland, Registration Number: 368047 > 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" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine%[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.
