Re: UDP and TCP

From: Nico Tranquilli <>
Date: Tue, 21 Jan 1997 14:24:22 +0100 (MET)

You, Bernd Zimmermann, wrote:

> Hi,

> can someone explain the internal difference between an UDP- and a
> TCP-Hit logging ?
> The longer I look at the log files the more I get confused by them.

> I thought a parent is asked via UDP if an object is in its cache and if
> so the object is requestet via TCP (expecting UDP_OBJ_HIT). Isn't it ?

UDP_HIT_OBJ occurs when the object is asked via UDP (ICP) and, due to the
HIT, is returned in the icp hit response packet.
You can turn off HIT_OBJ replies turning off udp_hit_obj in squid.conf

A TCP HIT is logged when you ask via HTTP (TCP) and the object is found in
the cache.


Nico Tranquilli
CINECA - Interuniversity Computing Centre
Networks and Distributed Systems group
phone: +39 (51) 6171519
Received on Tue Jan 21 1997 - 05:31:13 MST

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