FTP puzzle?

FTP puzzle?

[zzapper]

Say I am uploading a very large file to a server, can someone else with an 
equally fast or slower download start to download before I've finished?

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Re: FTP puzzle?

[Igor Peshansky]

On Fri, 5 May 2006, zzapper wrote:

> Say I am uploading a very large file to a server, can someone else with
> an equally fast or slower download start to download before I've
> finished?

IIRC, the server will report the *actual* size of the file on disk, not
the "projected" size the file will have after your upload.  So anyone
attempting to download the file before it's finished uploading will get a
truncated copy.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha@cs.nyu.edu | igor@watson.ibm.com
ZZZzz /,`.-'`'    -.  ;-;;,_		Igor Peshansky, Ph.D. (name changed!)
     |,4-  ) )-,_. ,\ (  `'-'		old name: Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"Las! je suis sot... -Mais non, tu ne l'es pas, puisque tu t'en rends compte."
"But no -- you are no fool; you call yourself a fool, there's proof enough in
that!" -- Rostand, "Cyrano de Bergerac"

Re: FTP puzzle?

[Christopher Faylor]

On Sun, May 07, 2006 at 06:35:54PM -0400, Igor Peshansky wrote:
>On Fri, 5 May 2006, zzapper wrote:
>>Say I am uploading a very large file to a server, can someone else with
>>an equally fast or slower download start to download before I've
>>finished?
>
>IIRC, the server will report the *actual* size of the file on disk, not
>the "projected" size the file will have after your upload.  So anyone
>attempting to download the file before it's finished uploading will get
>a truncated copy.

Personally, I've only tried this with hippos and the resulting carnage
of downloading only .79237 of a hippo convinced me never to try such an
activity again.

cgf

Re: FTP puzzle?

[Igor Peshansky]

On Sun, 7 May 2006, Christopher Faylor wrote:

> On Sun, May 07, 2006 at 06:35:54PM -0400, Igor Peshansky wrote:
> >On Fri, 5 May 2006, zzapper wrote:
> >>Say I am uploading a very large file to a server, can someone else with
> >>an equally fast or slower download start to download before I've
> >>finished?
> >
> >IIRC, the server will report the *actual* size of the file on disk, not
> >the "projected" size the file will have after your upload.  So anyone
> >attempting to download the file before it's finished uploading will get
> >a truncated copy.
>
> Personally, I've only tried this with hippos and the resulting carnage
> of downloading only .79237 of a hippo convinced me never to try such an
> activity again.

"There's more than one way to skin a hippo"? :-)

Of course, it depends on exactly *which* .79237 of the hippo you've
downloaded...
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha@cs.nyu.edu | igor@watson.ibm.com
ZZZzz /,`.-'`'    -.  ;-;;,_		Igor Peshansky, Ph.D. (name changed!)
     |,4-  ) )-,_. ,\ (  `'-'		old name: Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"Las! je suis sot... -Mais non, tu ne l'es pas, puisque tu t'en rends compte."
"But no -- you are no fool; you call yourself a fool, there's proof enough in
that!" -- Rostand, "Cyrano de Bergerac"