[Unison-hackers] Asymmetric DSL and large files

[Benjamin Pierce]

Yes, I suppose in principle the other direction would work fine.  But  
implementing it in Unison would be a nontrivial amount of coding, I'm  
afraid.

Best,

    - Benjamin



On Jan 18, 2009, at 10:03 AM, Stefan Goldmann wrote:

> Benjamin Pierce wrote:
>> It uses the same algorithm as rsync: the receiving machine makes a
>> summary of the blocks in the file on its end and gives it to the
>> sending maching (this must be what you're seeing, I guess), which  
>> then
>> sends it the changed blocks.  There's a nice paper by Andrew Tridgell
>> if you're interested in details...
>>
>>      - B
> And here the problem is revealed. In my case, this is the bottle neck!
>
> Is there any specific reason why the block summary list has to go from
> receiving machine to sending machine? If it would be done vice versa,
> the receiving machine would merely have to transmit a rather compact  
> list
> of blocks it requests to the sender.
>
> I could imagine, there are quite a couple of ADSL users out there,  
> who might
> be happy about an option to change the standard behaviour. ;-)
>
> Cheers, Stefan
>
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