Re: source_ping

From: Alex Rousskov <>
Date: Thu, 14 Jan 1999 13:04:59 -0700 (MST)

On Thu, 14 Jan 1999, Henrik Nordstrom wrote:

> * How it behaves when you have a mixed setup of netdb and non-netdb
> parents. I think that netdb parents are prefered over non-netdb parents.

Netdb parents are preferred, at least when the choice is made by the
Digest routine.
> * It also feels a bit like the implementation of HTTP netdb exchanges
> are a bit premature, sort if in the same state as digest exchanges.
> Every hour a complete database is exchanged.

NetDB database is small, usually less than 200KB for a big cache.

> The ICP based netdb exchanges are also far from perfect. I think that the idea of exchanging
> netdb data using ICP should be investigated further (or any other UDP
> based protocol). HTTP feels like a far from optimal netdb transport
> mechanism.

HTTP is certainly not an optimal netdb transport, but I am not sure if any
optimization is actually needed. NetDB exchange is not a bottleneck and
does not slow down anything. The only question is the freshness of the
data. However, transport mechanism is virtually irrelevant to freshness
and, most importantly, we do not know if any other exchange rate is better
than the current one.

Digests are a different story.

Received on Thu Jan 14 1999 - 13:08:27 MST

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