"Edward J. Huff" <[EMAIL PROTECTED]> writes:

> On Sun, 2003-11-16 at 21:40, Ken Corson wrote:
> > Edward J. Huff wrote:
> Thanks for the confidence, but I don't know everything.  I took
> the guy you corrected as being right because I got behind reading
> this list and thought that no one corrected _his_ mistake.  But
> since Toad and Ian replied to your message and didn't correct it,
> you may well be right.  But I saw other exchanges which make
> much more sense if QR's do go all the way back.
> 
QRs are only propogated back one node; that node then looks up the
next best place to route the request and tries again.  QRs do *not*
propogate all the way back like DNFs.

> Assuming that the immediate predecessor can retry, then one QR
> is not a disaster.  But if HTL was 25, and you are the 24th
> node, and QR goes all the way back, that means that 22 nodes
> accepted the query, routed it, and will process the QR, all
> for nothing.  Especially if you knew where to send it and
> the next node has the data.  Can someone who knows for sure
> comment?
> 
I know for sure; the 24th node will retry until it finds a node to
accept the query.

> So, does a QR go all the way back to the original requester
> before retry, or not?

Nope, only one hop.

Thelema
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