1.2 beta 18 success and a hack

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Hi, just to report that we've had 1.2 beta 18 up and running and being
torture tested (with lots of {tcp,udp}-banger processes running on
URLs from old cache logs) on one of our RedHat 5 boxes for some ten
days now (without a single crash!) and today felt brave enough about
it to run it live on one of our production service machines. Looking
good so far :-)

I'd also like to point people at

  <URL:http://wwwcache.ja.net/~martin/no-misses.diff>

This is a hack to 1.2 beta 18 which adds support for a new option in
squid.conf - "no-misses" in a cache_peer entry. When this is enabled
for a peer, the machine making the ICP request will set a bit in the
ICP header which is meant to be interpreted by the machine on the
receiving end as an indication that the requesting machine would
prefer not to receive an ICP_MISS reply to this request.

It's just a first stab, but seems to work OK between my two test
machines (SPARC 20 with Solaris 2.6 and ThinkPad 560 with Linux
2.0.33/2.1.91). Next step is to add some tweaks to Squid's timing so
that the lack of ICP_MISSes doesn't slow everything down drastically ?

What do people think ? The ultimate aim of this for me is to be able
to multicast the ICP requests out, and only get replies back from
those peers which have the cached URL. Each peer still has to do work
in order to figure out whether they have the requested URL, but they
don't all have to do the work of replying to each ICP request they
receive.

Ciao!

Martin

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Received on Tue Jul 29 2003 - 13:15:47 MDT