[ZWeb] www.zope.org isn't responding.

ethan mindlace fremen mindlace@digicool.com
Mon, 26 Mar 2001 12:19:00 -0500

Hi, Karl.

There's a product out there called web ants that "accelerates" your 
download by making multiple requests for the same file at different offsets 
- essentially exploiting the continuation feature of HTTP 1.1.

It is certainly debatable whether this speeds things up in a technical 
sense, but if a site has a policy of limiting individual requests' 
bandwith, it could certainly have an effect.

Anyway, it completely clobbers zope.  We had one client that repeatedly 
asked for the windows version of zope, and each time it would ask for the 
file more than 4 times.

As zope is not really HTTP 1.1 compliant, zope served the entire file each 

Each ZEO Client has 4 threads.  When all of those threads are consumed, 
zope can't answer new requests.

I don't know why the requests weren't handled by apache, but I attribute it 
to mod_proxy's lack of 1.1 support.

For the moment we have disabled NetAnts requests.

ethan mindlace fremen
zopatista community liason