s3, is definitely the way to go, but there are fees involved there.

with our system we will have to have a scalable infrastructure in
place to handle the CRUD features on files stored on s3, this means
ec2.
right now, amazon does not have a great way of reading and writing to
s3 with out an ec2 instance.

for more database like stuff simpleDB, drops the request cost of S3,
and charges $1.50 per GB stored vs $.18 per GB stored.

it would be nice to come up with a general image for amazon that could
process such requests for social widgets.  it would be even better if
we could some how just pay for CPU time and not hours of images
running.

On Fri, Mar 7, 2008 at 11:19 AM, Arne Roomann-Kurrik
<[EMAIL PROTECTED]> wrote:
> Hi Rohit,
>
>    The size of the application data store is going to change from container
> to container, but I don't think that it will realistically get to the size
> of 1-2Mb per user per application.  Even though 1-2Mb doesn't sound too big,
> there are some social network applications with millions of users - an app
> storing 1 Mb per user with a million users will need about a terabyte of
> storage space.
>
>    Activities are for notifying a user's friends about actions that the user
> has taken in an application.  It doesn't provide any form of storage (other
> than the piece of text used to describe the activity, I guess).
>
>    Your best bet for something like this would be to invest in some scalable
> storage hosting.  Amazon provides a service for this called S3 [1], and I'm
> sure that there are other services like this as well.
>
>  Hope this helps,
> ~Arne
>
> [1] http://www.amazon.com/gp/browse.html?node=16427261
>
>
> On Fri, Mar 7, 2008 at 7:38 AM, Rohit Ghatol <[EMAIL PROTECTED]> wrote:
>
> >
> > Hi,
> > I am trying to build an application which needs viewer to store some
> > data for himselves and retrieve data for viewer's friends.
> >
> > Now at first I decided to use the user application space (to start
> > with), but it is infact it is too small (and the purpose of it looks
> > like to store settings and not really data). I also thought of
> > fetching and storing the data from some external source, but then I
> > need to link each user with some data on this external source.
> >
> > I was wondering if activities could help me here. Frankly speaking , I
> > still haven't understood activites that well yet. Would some one be
> > able to suggest some examples of activites to me and how they can be
> > used with an open social application.
> >
> > Frankly speaking I need some data store for my application not too
> > big, may be 1-2 mb, per user per application.
> >
> > Regards,
> > Rohit
> >
> >
>
>
>  >
>



-- 
-- 
Justin Kruger
http://jDavid.net
[EMAIL PROTECTED]

"If you are successful, it is because somewhere, sometime, someone
gave you a life or an idea that started you in the right direction.
Remember also that you are indebted to life until you help some less
fortunate person, just as you were helped."  --Melinda Gates

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