Owen,

I don't have all the details yet, but it would be an Internet-based case 
management system that can handle:
>10M clients
20-100 MB/client of reports and images (close to 1 PB of data)
data for one client completely unrelated to another
100K requests per hour, with an average size of 2MB and a response time of 
less than 5 seconds
And, these estimates could be out by a factor of 10 (either way).

Currently they don't have these volumes, so they need a strategy to scale up 
to the anticipated volumes. 

It may be that a relational database can handle these volumes, but from what I 
have learned, from an administrative & performance tuning perspective, mongoDB 
would be much better in this situation.  These requiremenst need to be 
balanced off against the development effort.  

Henry

On December 21, 2010 07:39:57 am Owen wrote:
> Henry,
> 
> Can you share what write/read volume and user capacity that your client
> thinks won't scale with a relational database?
> 
> Perhaps that may be an issue with MySQL, but Oracle can scale (but you pa
> $) and Postgres (free) has a great reputation, but haven't tried it
> myself.
> 
> -Owen

-- 
Henry Baragar
Instantiated Software

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