[Box Backup] Observations on Win32 client

[Jamie Neil]

Mr R G Shepherd wrote:
> Jamie Neil wrote:
>> 6) From our testing, boxbackup seems to be able to saturate even fat 
>> pipes, which can cause problems when backups are done during the day. 
>> Some kind of scheduled bandwidth throttling would be invaluable (I 
>> know this could probably be done with another program in true *nix 
>> tradition, but in Windows environments this is not so simple).
> 
> I know this may be entirely not what you are looking for, however
> 
> I plan to use IPCop's built in traffic shaping to throttle the traffic 
> on the bbackup ports.

We use IPCop on a number of sites, but the traffic shaping controls only 
allow you to prioritise traffic, not actively throttle it.

What we want to do is similar to the approach taken by certain P2P 
clients where you can set up bandwidth schedules. For example between 
8am and 6pm weekdays, and throughout the weekend, throttle the bandwidth 
to 32kbps, but unthrottle at any other time.

AFAIK this is done by monitoring the RTT and then adjusting the TCP 
window size to restrict the throughput to the selected rate.

-- 
Jamie Neil | <jamie@versado.net> | 0870 7777 454
Versado I.T. Services Ltd. | http://versado.net/ | 0845 450 1254