Python and Zope

Hernan M. Foffani hfoffani at yahoo.com
Mon Sep 10 15:20:11 EDT 2001

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Oleg Broytmann <phd at phd.pp.ru> wrote:
>
>    I talked about persistent DB (SQL) connections, not speed. When Apache
> kills a children, what a children (module) shall do with open connection?
>    Zope (as most web-application servers) opens connections at need, but
> closes it only on timeout. Real persistence of connections.
>

Persistence has more than one meaning here. It's possible to have
one connection open thru several different requests, with Apache (or
whatever) not dropping the connection at a close, but sending
a rollback transaction. This should be easy to implement.

If persistance to you means the capability of a sql transaction
to "cross" http requests, then that's another problem. The
previous solution doesn't work, so either you use a user-threaded
device or the DB layer needs to implement a server of a pool of
connections. Then the bunch of http-server processes just asks for
a free connection to use. The DB pool takes care of rollbacks and
timeouts issues.

It's not a problem of the architecture itself, but what the
implementators did on any particular webserver/cgi/language/dbclient

Just to clarify a bit. But I'm getting far offtopic now.

Regards,
-Hernan

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