[Zope] Re: Zope and mod_python

Florent Guillaume fg at nuxeo.com
Wed Feb 23 13:47:43 EST 2005

Tres Seaver  <tseaver at zope.com> wrote:
> Pascal Peregrina wrote:
> | mmmm... I thought that thre was one cache per connection to Zeo ??
> |
> | A standard Zope instance with Zeo has 4 connections to Zeo, and when you
> | look at the cache status, it is different for each connection (different
> | number of objects).
> | So I am not sure that there is anything shared accross connections.
> There are two caches in play here:  the in-memory cache is
> per-connection (and not specific to ZEO);  the on-disk cache (which is
> ZEO-specific) is shared across connections.
> | If I am right, then it makes no real difference to have many Zope with one
> | connection to Zeo vs. one Zope with many connections to Zeo.
> |
> | If I am wrong, then I agree, "it's a shame" :)
> We would need to test to see if it ended up mattering.  Cache behavior
> is almost *never* what I expect.

If ZEO cache became a problem, we could add a fake local ZEO server that
caches and relays to the real ZEO server on a remote machine. Has anyone
thought about or written such a beast ?


Florent Guillaume, Nuxeo (Paris, France)   CTO, Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com

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