[Box Backup] Observations on Win32 client

[Ben Summers]

Remember, you can do this on a firewall even if you can't run Box 
Backup on an OpenBSD box. (Although Box Backup will always work very 
nicely on OpenBSD, as it's my primary platform for deployment.)

Ben



On 15 Feb 2005, at 14:52, Justin H Haynes wrote:

> If using OpenBSD is an option, then see the section on Class Based 
> Queueing (CBQ) in http://www.openbsd.org/faq/pf/queueing.html:
>
> "
> CBQ queues are arranged in an hierarchical manner. At the top of the 
> hierarchy is the root queue which defines the total amount of 
> bandwidth available. Child queues are created under the root queue, 
> each of which can be assigned some portion of the root queue's 
> bandwidth. For example, queues might be defined as follows:
>
>    Root Queue (2Mbps)
>
>        Queue A (1Mbps)        Queue B (500Kbps)        Queue C 
> (500Kbps)
>
>        "
>
>
>
> Jamie Neil wrote:
>
>> 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.
>>
>
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