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.
>>>
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