How to charge based on accounting correctly

[George Chelidze]

Hello Alan,

>    Why not just update the users credit when the session is closed?

Good question. The short answer is to charge as soon as possible.

>    Store the last "session length" for a session.  If the current packet
> has a smaller session length, ignore the packet.  Otherwise, look at the
> difference between the stored session length, and the session length in
> the current packet.  Use that time for billing, rather than the time you
> received the packet.

That's the way it's implemented right now. Thanks

>> 2. Is it a correct behavior of a NAS to store accounting information on
>> it's internal disk if it can't get acknowledgment for accounting
>> request/s and resend it later?
>
>    Yes.

How much time can it keep the data? I don't think it's a good idea to 
resend the data after several hours.

Best Regards,

George