LibURL Error Previous request not completed

Dave Cragg dcragg at lacscentre.co.uk
Thu Aug 3 12:09:00 EDT 2006


On 3 Aug 2006, at 15:32, Alex Tweedly wrote:

>>
>> I have to question whether there are any benefits in doing that.   
>> Whether you download files sequentially or out of sync, the server  
>> is  trying to do essentially the same thing -- push the same data  
>> down  the same physical pipe. Does it matter the order in which it  
>> does it?
>>
> Yes, it does matter. There are a number of cases where multiple  
> connections will win out :
>
> 1. avoiding start/finish round-trip delays for each transfer.
>      You don't of course avoid them - but you can interleave them  
> with the parallel transfers, and hence keep the pipe closer to full.
> 2. transient congestion (and packet-drops) have less effect on  
> multiple connections
>      Esp. if the congested router is using RED
> 3. rate-limiting per connection from the server      can be imposed  
> lower than your connection bandwidth
> 4. bandwidth allocation on congested links
>      Esp if the upstream router is using WFQ or DRR queuing, and  
> high capacity connections are severely limited
> 5. .... many more .....

OK. I yield. :-)

Cheers
Dave



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