[Request] Remote operation need to be cached

[James Blackwell]

On Mon, Oct 03, 2005 at 11:03:51AM -0400, Aaron Bentley wrote:
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> Alexander Belchenko wrote:
> 
> > In contrast bzr pul trying to pull 27 missed revisions with all
> > sattelites and this is more faster for me because in this way checked
> > less number of files and downloaded only missed. (Again, if I understand
> > correctly).
> 
> I suspect that bandwidth, not latency, is the killer for dialup, and bzr
> pull would do better than rsync in this regard, because it knows what
> doesn't need to be checked.

If my old tests are still any indication, the problem actually is both.
High bandwidth links typically see a roundtrip of 40ms-80ms. A dialup can
see roundtrip latency of anywhere from 250 - 3000 (yes, three _thousand_)
ms.

If one downloads a 35 meg tarball at 6KB/sec, the expected time is about
an hour an forty minutes. If you throw on top of of that 1/2 a second per file
in a tree of 5.5k files, you've added an extra 45 minutes on top of that.



> 
> Aaron
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