[Zope3-dev] Some thoughts on Zope 3, Zope 3 applications, and Zope 3 instances

[Jim Fulton]

Chris Withers wrote:
> Jim Fulton wrote:
>> None of this should be taken as any sort of edict.  I'm also not 
>> trying to name anything. While I'd love to spur discussion, I hope not 
>> to start any arguments. :)
> 
> On that front, I'll note that I've seen 3 patterns emerge in the 
> projects I work on:
> 
> 1. Development: lots of distinct projects per machine, each using their 
> own zope version, products and/or python libraries, and data. For me, 
> the Zope 2 instance home model and Zope software installed in, for 
> example, /zope/2.9.5, works perfectly
> 
> 2. Production with multiple projects in an instance. Here's there are 
> often multiple websites mapped through an Apache front end to several 
> data sets / software sets, each in their own folder. This is the class 
> Zope 2 model where each site uses a combination of products, zodb 
> scripts and templates and data stored in objects within the top level 
> folder. Again the Zope 2 instance home model works well for this, but 
> you only tend to end up having one instance on the box, so maybe it'd be 
> easier on sysadmins and the like if things were different in this case, 
> although I find having everything in a sub-tree of the file system 
> pretty compelling.
> 
> 3. Large production setups with one project spread over multiple 
> machines. Each machine has a set role, usually involving several 
> almost-identical app servers. I think this is the case you cover well 
> and I completely agree with the things you've said.
> 
> Have other people experienced these patterns?
> 
> If so, which do we want to support and how?

While mkzopeinstance is a fine tool, as far as it goes, it's
not flexible enough for our needs.  I'll be releasing a buildout
recipe that meets my needs. I suspect it will meet other needs as
well, but there might end up being competing recipes that handle
other needs better.

Jim

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