Why not use a BigIntegerField?

On Sat, Aug 1, 2015 at 12:06 AM, jordi collell <jor...@gmail.com> wrote:

> Hi all!
>
> I have to store spreadsheet info on a db. Some kind of quotes where the
> user can store distinct prices for every zone.
>
> After modeling the data, i have a Cell like row. (related to a zone, and
> with a quantity field).. something like:
>
> zone1  1  100
> zone1  2  99
> zone1  3  98
>
> Every zone is a fk... The problem is, that data grows quick.. because some
> quotes can have up to 65 unit fields with 70 to 100 zones..
>
> Currently i have a autopk field. but I'm not sure if it will scale.. If i
> have 5000 users and every users makes 100 quotations.. (7000 rows on the
> worst case) this is 3500000000.. easy enought to get out of autoincrement
> fields..
>
> I'm thinking on getting rid of the pk field, and use a unique together
> with (zone_units). do you think this is a good aproach with the orm? I saw
> that is not possible to make primary key fields ( with grouped fields), but
> perhaps I can do it with instead of declaring a int field, have a char
> field storing the
> %s_%s_%s ( quote_id, zone_id, units ) ...
>
> do you think the last could be a good aproach?
>
> Sure if i have to shard the data (on the future) I can do it, using this
> kind of keys.. Data will be queryed by zone.. (For making comparasions of
> quotes)
>
> I will apreciate any help on the matter.
>
>
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