[Zope-dev] Threaded Database Access

[Adrian Hungate]

I have a product out that i designed to allow querying of an ODBC database
from any platform using ODBCSocketServer on the database machine (As this
has been turned commercial, and the opensource code is now not being
maintained, I am developing a complete replacement - out on SourceForge
soon).

I have used this quite successfully in some tests that I have run, and this
is certainly multithreaded on the server and client sides.

Look for ZDataQueryKit ( http://www.zope.org/Members/haqa/ZDataQueryKit )
and ODBC Socket Server (You'll have to search sourceforge for the new
project for that as I have lost the URL.)

Drop me a line if you are interested in my new ODBCServer project, which
will include some major protocol enhancements, including schema queries, and
result compression.

Adrian...

----- Original Message -----
From: "Jeff Nielsen / UgoFast" <Ugo@speakeasy.net>
To: <zope-dev@zope.org>
Sent: Thursday, May 02, 2002 5:43 AM
Subject: [Zope-dev] Threaded Database Access


> I'm using Zope/Zserver 2.2.4, ZODBCDA v3.1.0b2 and SQL Server 2000. I've
> noticed that pages generated from database querries are definitely
> single threaded, and these pages are the bulk of my site. My poking
> around seems to indicate that ZODBCDA is the single-threaded culprit,
> and some emails from the list over the last couple months seem to
> confirm that.
>
> The volume of my site and the size of the database (hence query response
> times) are getting to the point that this is a concern. So I'm
> investigating my options, including:
> 1) Cluster the web site with multiple single processor machines.
> 2) Move to a database that Zope supports multi-threaded access to.
> 3) ?
>
> I've been considering a move to Oracle or PostgreSQL/MySQL for other
> reasons, but I'm not going to do it just for yucks. Extending and
> populating my site gives better return than porting the database. I'd
> like to make sure I'll get return on my time investment.
>
> I saw an document on the Zope web site from 1999 that talked about
> labeling Zope DAs Level 1,2 or 3 based on their sophistication, but I
> don't see any of the current DAs labeled as such. There was text in the
> Oracle and MySQL DA descriptions that seem to imply multi-threaded
> behaivor though.
>
> I'm looking for the info from the community on:
> 1. Is the ZODBCDA single-threaded and might that change anytime soon?
> 2. Can someone confirm that the Oracle, PostgreSQL or MySQL DAs are
> multi-threaded.
> 3. Does the multi-threading require using the Zope Session facility or
> some other feature? (My site uses FSSession.)
>
> Thanks in advance for any input.
>
> Jeff Nielsen / UgoFast
> http://www.UgoFast.com
> Jeff@UgoFast.com
>
>
>
>
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