[Zope] RE: [Zope-dev] Squid Proxy VS LVS+Apache+ZEO

[sean.upton@uniontrib.com]

I would suggest moving this to zope@zope.org, which I've cc'd.

I would strongly suggest using Squid as an alternative to both Apache and
LVS and kill two birds with one stone here, allowing you to get caching and
load-balancing a ZEO cluster with one tool.

Squid will load-balance a cluster of ZEO clients by talking directly to
ZServer on each of those boxes.  With Toby Dickenson's ICP patch to Zope,
you can have ZServer handle ICP requests, which will allow your ZEO clients
to becomre part of the cache hierarchy for Squid.  This means that Squid
will truly load-balance your ZEO servers, in the same fashion LVS would...
Squid replaces Apache, mod_proxy, LVS, and provides caching too!

Personally, I'm of the opinion that every production install of Zope needs
ZEO, not just for performance, but also for the convenience factor.  You
absolutely need ZEO, though, if you have high-traffic, and low ability to
cache most of it (i.e. lots of dynamic content).

Also, if you need SSL, use Squid 2.5 with OpenSSL to accelerate all your
backend non-SSL servers, including ZServer, Apache, etc...

Oh, and if you need Apache for non-Zope stuff, Squid will proxy that too.

Sean

-----Original Message-----
From: Eric Roby [mailto:Eric.Roby@noaa.gov]
Sent: Tuesday, March 05, 2002 6:59 AM
To: zope-dev@zope.org
Subject: [Zope-dev] Squid Proxy VS LVS+Apache+ZEO


I apologize (in advance) if this is on the wrong list but some of the
previous discussions regarding these topics have been done here.

I have read much of the documentation on Squid, the zope.org cluster
configuration, and many of the excellent How-To's out there.  However,
my particular case requires ssl for authentication to the ZMI.  It
appears that ssl is best accomplished with Squid, however we have to be
able to provide many of the services that the zope.org cluster leverages
with LVS.  It appears that the Apache+mod_proxy+ZEO configuration
provides much of the functionality that Squid+ZServer would provide,
alone. I guess my biggest problem is determining whether it makes sense
to use Squid in conjunction with ZEO (which we want to pursue) or
re-build Apache with mod_ssl in the LVS+Apache+mod_proxy+ZEO setup??

If any one has been down this road I would greatly appreciate any
insight that you might have.

Thanks in advance...

Eric


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