> From: Chris Bartram [mailto:[log in to unmask]] 
> 
> HP-3000 Systems Discussion wrote:
> > Speaking of throttling on HP3000's, can anyone tell me why 
> traditional 
> > Reflection file transfer is so gawdawful slow?
> > 
> > I knew there was a reason for it, I just can't remember.
> 
> Sure.
> 
> A "regular" reflection transfer is operating over the 
> terminal interface. Reflection is capturing data sent over a 
> terminal connection; which means 1) the data has to be 
> cleaned/encoded so no unfortunate/unexpected connection 
> interruptions occur (control-y/q/f/esc/etc.) and 2) data 
> transfers are limited to terminal device recsizes (80/132/256 
> bytes per line, with appropriate required flow controls). 
> That's a lot of extra overhead; one read operation per record.
> 
> The "fast" file transfers open a separate tcp/ip port and 
> simply blast the data across the network un-encoded and 
> without any extra flow controls -beside those built into 
> TCP/IP). Very similar to FTP file transfers.
> 
> -Chris Bartram

Ahhh, that makes sense, thanks!

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