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  #11  
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David Fetter
 
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Default Re: Beta5 now Available - 11-23-2004 , 10:37 AM






On Tue, Nov 23, 2004 at 05:33:15PM +0100, Peter Eisentraut wrote:
Quote:
Am Montag, 22. November 2004 17:40 schrieb David Fetter:
A much slimmed-down bt.postgresql.org is now serving it.

Out of curiosity, what purpose does a bittorrent source serve in
this case?
BitTorrent was designed to take bandwidth load off servers that would
otherwise need to be on very large and expensive pipes. It does this
by serving mostly information about where other servers are, rather
than serving the same (much larger) chunks of data over and over again
to clients.

You can find more information on what BitTorrent does and how it does
it at

http://bittorrent.com/introduction.html

HTH

Cheers,
D
--
David Fetter david (AT) fetter (DOT) org http://fetter.org/
phone: +1 510 893 6100 mobile: +1 415 235 3778

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  #12  
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Marc G. Fournier
 
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Default Re: Beta5 now Available - 11-23-2004 , 10:48 AM






On Tue, 23 Nov 2004, Peter Eisentraut wrote:

Quote:
Am Montag, 22. November 2004 17:40 schrieb David Fetter:
A much slimmed-down bt.postgresql.org is now serving it.

Out of curiosity, what purpose does a bittorrent source serve in this case?
I've always just seen it as an alternative option for downloading *shrug*
just like ftp:// or http:// ...

Quote:
The download servers have enough bandwidth to serve any client faster than
the client can take. The traffic on the download servers is not reduced,
only distributed differently. I don't see any advantage.
Actually, and here is where I exhibit my total lack of knowledge of BT
internals ... my understanding was that each 'client' becomes a 'server'
by the fact that they have it on their machine and running ... so, over
time, the amount of load on the central server would decrease, since new
downloads would come from closer "client machines" ... essentially, a
whole new set of "unofficial mirror sites" for the source code ...

Is this a wrong understanding?

This is David's baby though, not mind I don't know much about it, and
based on what little I've read about it (and original discussions),
believe its a more open source 'kazaa/napster', and, as such, works
similar ...

----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email: scrappy (AT) hub (DOT) org Yahoo!: yscrappy ICQ: 7615664

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  #13  
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Jeff Hoffmann
 
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Default Re: Beta5 now Available - 11-23-2004 , 11:06 AM



Marc G. Fournier wrote:

Quote:
The download servers have enough bandwidth to serve any client faster
than
the client can take. The traffic on the download servers is not reduced,
only distributed differently. I don't see any advantage.


Actually, and here is where I exhibit my total lack of knowledge of BT
internals ... my understanding was that each 'client' becomes a 'server'
by the fact that they have it on their machine and running ... so, over
time, the amount of load on the central server would decrease, since new
downloads would come from closer "client machines" ... essentially, a
whole new set of "unofficial mirror sites" for the source code ...
This is essentially true, although it makes a lot more sense for things
that are a lot larger (full ISO's like Linux distributions) and have a
higher desirability than "official" avenues to get to them. That's not
to say that it shouldn't be offered, it's just a niche thing & is
generally time-sensitive (i.e., it does the best when there a lot of
people using it & the time most people use it is when something is "hot
off the presses"). PostgreSQL is sufficiently small and has high enough
availibility that either you won't have to think twice about downloading
through standard avenues or BT won't help you.

--
Jeff Hoffmann
jeff (AT) propertykey (DOT) com

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  #14  
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Stephen Frost
 
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Default Re: Beta5 now Available - 11-23-2004 , 11:16 AM



* Marc G. Fournier (scrappy (AT) postgresql (DOT) org) wrote:
Quote:
On Tue, 23 Nov 2004, Peter Eisentraut wrote:
The download servers have enough bandwidth to serve any client faster than
the client can take. The traffic on the download servers is not reduced,
only distributed differently. I don't see any advantage.

Actually, and here is where I exhibit my total lack of knowledge of BT
internals ... my understanding was that each 'client' becomes a 'server'
by the fact that they have it on their machine and running ... so, over
time, the amount of load on the central server would decrease, since new
downloads would come from closer "client machines" ... essentially, a
whole new set of "unofficial mirror sites" for the source code ...

Is this a wrong understanding?
Nope, that's about right, from what I understand. Not only that, but
for far-flung people (from the server) it's possible that there are
links between the server and the client that are too slow, bt could
reduce the bandwidth demands on those links too if other people on the
far side are also grabbing the stream.

Stephen

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  #15  
Old   
David Fetter
 
Posts: n/a

Default Re: Beta5 now Available - 11-23-2004 , 11:46 AM



On Tue, Nov 23, 2004 at 11:06:40AM -0600, Jeff Hoffmann wrote:
Quote:
Marc G. Fournier wrote:

The download servers have enough bandwidth to serve any client
faster than the client can take. The traffic on the download
servers is not reduced, only distributed differently. I don't see
any advantage.


Actually, and here is where I exhibit my total lack of knowledge of
BT internals ... my understanding was that each 'client' becomes a
'server' by the fact that they have it on their machine and running
... so, over time, the amount of load on the central server would
decrease, since new downloads would come from closer "client
machines" ... essentially, a whole new set of "unofficial mirror
sites" for the source code ...

That's not to say that it shouldn't be offered, it's just a niche
thing & is generally time-sensitive (i.e., it does the best when
there a lot of people using it & the time most people use it is when
something is "hot off the presses").
^^^^^^^^^^^^^^^^^^^
The above is precisely the use case I set the thing up for.

Cheers,
D
--
David Fetter david (AT) fetter (DOT) org http://fetter.org/
phone: +1 510 893 6100 mobile: +1 415 235 3778

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