cache_peer in varnish

Poul-Henning Kamp phk at
Wed Jul 25 21:51:47 CEST 2007

In message <20070725205709.J75759 at>, =?ISO-8859-1?Q?Andreas_R
=F8sdal?= writes:
>On Wed, 25 Jul 2007, Per Andreas Buer wrote:
>> Kamil Radziszewski wrote:
>>> How can i replace the squid command "cache_peer" in varnish ??
>> No. There is no cache peering in Varnish - and most likely there won't
>> be. In most cases more or less just as fast to fetch the content from
>> the backend.
>Why, do you have any data which indicates that fetching content from the 
>backend is as fast as fetching it from a peer? Some backends can take 
>several seconds to respond, if they are under heavy load and have to hit 
>a database. Fetching data from a cache peer shouldn't take many 
>milliseconds. Of course this could vary from system to system...

Absent any evidence to the contrary, our current thinking is that
it is a better idea to have a two-layer varnish setup than a peer
to peer protocol.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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