[ZODB-Dev] Re: ZEO and Twisted

[Jim Fulton]

Florent Guillaume wrote:
> [Ccing zodb-dev]
> 
> On 25 Apr 2006, at 15:09, David Pratt wrote:
> 
>>> The protocol is simple yes, but the iteractions w.r.t threading  are 
>>> sometimes subtle.
>>
>>
>> Hi Florent.  This could be set up using a twisted's application  
>> object so that you have a twisted app using a twisted .tac. I guess  
>> this could still use the .conf as in this but twisted already has a  
>> means of daemonizing its services with twisted. This would give you  
>> something like this to start up zeo.
>>
>> twistd -y zeo.tac
>>
>> What are your thoughts?
> 
> 
> Huh, I thought you were talking about the ZEO client, ClientStorage,  
> not the ZEO server.
> For the ZEO server I don't see the point of changing it, it works well.
> OTOH a ClientStorage has to integrate with the other servers in Zope,  
> and that's the one that would benefit from being moved to the twisted  
> event loop if twisted is used.

(I'm mostly not paying attention to this thread but I have to speak up.)

I disagree.  ZEO should not be dependent on an application mail loop
at all.  It was a mistake to couple ZEO's networking at an application's
asyncore main loop.  This *greatly* complicated ZEO's implementation.
I'd much rather that ZEO's networking be independent of
an application.  Fortunately, asyncore allows multiple independent main loops.
Does Twisted?

Jim

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