[Zope3-dev] Re: How to debug zope3 if it completely hangs?

[Jim Fulton]

On Jul 12, 2007, at 11:04 AM, Tres Seaver wrote:

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> Benji York wrote:
>> Fabio Tranchitella wrote:
>>> I'd like to know if zserver is a good choice for high loads or if it
>>> deprecated and I should stay with twisted.
>>
>> We run some pretty high load apps, and we're happy with zserver.
>>
>>> Was zserver disabled only for security reasons?
>>
>> I don't believe it had anything to do with security.
>
> Nope:  it was disabled because:

Actually, Zope 3 doesn't use ZServer. Never has.  It uses zope.server  
which is a different implementation.

It was made to be no-longer the default server.  This was a mistake  
BTW. My bad.  zope.server is still supported.

>  - Not many people feel competent to extend ZServer.
>
>  - People thought that using a server maintained by others was better
>    than maintaining one ourselves.

Yup.

...

>
> I prefer ZServer becuase:
>
>  - It is faster.

We (ZC) have had serious problems with the twisted server in  
production.  We no-longer use it.  It may have improved.  It's worth  
noting that the trouble we've had might be due to something we/I did  
in the integration. :(  Chasing this is not a priority of mine.

>  - It is less complex.

I'm not so sure about this. Maybe.

>  - It got *lots* of attention for real-world scaling issues, and
>    is rock-solid stable.

I don't think this is true, or at least not as true as you think it  
is. :)

The zope.server != ZServer.  :(  It seems to be working reasonably  
well, but it is not the same server that has served Zope 2 well for  
many years.

Not counting Twisted, we are currently supporting 2 servers, ZServer  
and zserver. :(

...

> Note that the "flavor-of-the-month" is actually WSGI now, rather than
> Tsisted (which uses the WSGI support):  see Philipp's "zope on a  
> paste"
> demo, for instance.

I really wish someone would create some server benchmarks for WSGI so  
that we could have a more rational basis for evaluationg servers.

Jim

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