- Zope - Zope lists

ZSERVER, THREADS, PERFORMANCE & FUTURE PERFORMANCE
by Theodore Patrick 12 Nov '99

12 Nov '99

In the ZOPE Documentation there are several tuning features for ZOPE ODB and ZSERVER. I was wondering about current Zope Performance and where it is heading. In certain areas we are looking at JAVA Servlets for performance reasons, where ZOPE falls short of expectations. Here are some questions that we have come up with in regards to Zope Performance in an Enterprise Production Environment. CURRENT ZOPE PERFORMANCE: Q: Is there a performance improvement in raising the number of threads on the ZOPE ODB? Q: Does increasing the # of threads cause any problems? With Threaded DA's? With the ODB? Q: Is ZOPE performance with threads hardware restrictive? (ie. More threads on a strong box=good, Default on a Strong box = bottleneck, More on a weak box=worse performance) Q: How does ZEO improve ZOPE performance? Q: Is there hidden ZEN out there on Performance Tuning Zope for a production environment? FUTURE ZOPE PERFORMANCE/DEVELOPMENT Q: Is ZOPE limited/Dependent on the associated Python Performance? Can ZOPE run on separate instances of Python(Multiple JVM's in the JAVA World)? Q: Is there hidden ZEN out there on Performance Tuning Zope for a Heavy Production Environment(besides ZEO)? (HPE = up to 150 Requests/sec) How does one scale Zope to Java Sevlet performance levels (compiled in-memory performance)? Sevlets = 200+ Requests per second (once invoked and in-memory) Can you run Zope as a precompiled application(not-interpreted python)? Q: Is there a roadmap in the Zope Development to get to these performance levels? What are the options? Thanks, Theodore E. Patrick Ishophere.com

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mysql connect
by hamdi mulya 12 Nov '99

12 Nov '99

my problem is how i connect mysql database engine to zope, what should i do..? Thanks..

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Re: Installing PythonMethod disables rename?
by Evan Simpson 12 Nov '99

12 Nov '99

Alexandre Ratti wrote: > when I saw Itamar's emails (copied below) I checked on my box. Same results > here on a NT 4 box with Zope 2.1.0b. > > I moved the PythonMethod product folder from my Zope 2.1.0b folder to my > older Zope 2.0.1 folder. This cured the new version and moved the problem > to the older version. Sorry this took so long, but it was a really subtle stupid bug on my part. You can download 0.1.6, or simply add '.copy()' to the end of line 6 of Guarded.py from version 0.1.5 Sorry, Evan @ 4-am

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broken images in management interface
by Eduardo Fernandez Corrales 12 Nov '99

12 Nov '99

Hello, I tried to install the WMF tasks/help desk product mentioned earlier in the list, and after doing it some of the images in the management interface appear broken. Files like http://localhost:8080/misc_/OFSP/dtmlmethod.gif are not found. Others like http://localhost:8080/p_/ControlPanel_icon do appear. I have even reinstalled the zope package (I am using debian) but the images are still broken. What could have caused this and how can I fix it? Thanks in advance -- Eduardo Fernández Corrales eduardo(a)sistelnet.es Sistelnet Integraciones Telemáticas - http://www.sistelnet.es

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Mildly Complex Data Structure
by Jason Spisak 11 Nov '99

11 Nov '99

Zopists, I am trying to divide an total amount into many parts. I'd like the total to equal 100%, but each piece needs to have a name assigned to it. </end hanous explanation> Example: Jack 20% Jill 20% Margret 60% How do I modle such a data structure in Zope? Martialing data into and out of a token property seems very daunting for this, and probably won't work. I looked a TinyTables for this but inserting data in a user friendly way is dificult to see. Anyone have any ideas? All my best, -- Jason Spisak webmaster(a)hiretechs.com

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Zope 2.1.0 beta 1 caution - please read
by Brian Lloyd 11 Nov '99

11 Nov '99

Hi all - We (DC) have run across a bug in the 2.1.0 beta that has given us some grief on the zope.org site, and I wanted to post a caution to those folks currently using the beta. In short, if you are doing any ZClass development where your ZClasses are based on Python base classes that are still in development (e.g. you are updating the Python base classes at times), there is a risk of getting a non- unpicklable object stuck into your object database. While the sequence of events required to cause this is pretty arcane, it can potentially be a real pain to recover from. So, if you are doing active ZClass development in 2.1.0b1 we strongly suggest that you either go back to 2.0.1 or take a break until tomorrow or Monday (I hope to have a 2.1.0 b2 ready that resolves this by then). If this is too painful (or you're hardheaded or just like living on the edge :) at least be sure to back up your Data.fs regularly just in case. Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Accessing an object from a list
by Alexandre Ratti 11 Nov '99

11 Nov '99

Hello, I ran into this problem once again: what is the best way to access an object whose ID is stored in a list? Here's my setup: I use a form with check boxes to select object IDs. The values for the selected boxes are send to the handler method in a list (myList). Here is the code in the handler method. <dtml-with REQUEST> ... <dtml-in myList> <dtml-let foo="_['sequence-item']"> <dtml-with "_.getitem(foo, 0)"> <dtml-var myProp1> - <dtml-var myProp2> </dtml-with> </dtml-let> </dtml-in> ... </dtml-with> I was lucky because this actually works. However, it looks kludgy. Is there a better way? For instance, can I use the 'mapping' attribute in the with tag? Thanks. Alexandre

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Uploading an image
by Oscar Picasso 11 Nov '99

11 Nov '99

I wanted to upload image from the local hard disk. I created a form with action=my_photo/manage_upload. I works fine but after submitting the form, I would like to change the rendered page : "! Your changes have been saved ". Also when I click on Ok, it sends me to my_photo/manage_main. What can I do to change this behavior? Thanks ****************************************************** Oscar Picasso picasso(a)videotron.ca ******************************************************

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Linux binary install requires chown (V2.1.0b1)
by Paul Gresham 11 Nov '99

11 Nov '99

Hi, I'm not sure if its in the docs, but the Linux binary install knows too much ... After the tar xvfz it creates the Zope directory with owner 506.users. As I'll run my installation along side apache, I ran the install script unde root, then did a "chown -R nobody.nobody var" so Zope will start. At this point I did a test and all was well. Next I installed five packages in no particular order (GenericUserFolder-alpha1.tgz, TinyTableB2.tgz, poll-0.6.3.tgz, Squishdot-0-3-2.tgz, ZDiscussions-0.1.0.tgz)and restarted Zope. It worked, but there were lots of authentication and/or file access problems that prevented me entering the manage screen. I fixed the problem with these commands ... chown root.root Zope-2.1.0b1-linux2-x86 cd Zope-2.1.0b1-linux2-x86 chown -R root.root * chown -R nobody.nobody var It was almost certainly one of the packages which tripped the whole thing up, but there is certainly a problem in that the tarball will extract to a funny owner, and post-install, the owners are a real mess. All the best, Paul Gresham MediaVisual Hitech Ltd Hong Kong

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Re: [Zope] Summary of DB Discussion
by M.-A. Lemburg 11 Nov '99

11 Nov '99

Tres Seaver wrote: > > Christopher Petrilli <petrilli(a)digicool.com> wrote: > > > On 11/9/99 7:45 PM, Anthony Baxter at anthony(a)interlink.com.au wrote: > > > > > I'm not sure that this is true - there are a number of ODBC drivers on > > > Unix, some are open source, and mxODBC interfaces them to Python. ODBC > > > drivers for databases are available in some cases. > > > > People have asked why we don't use mxODBC, a simple reading of the license > > would explain this. The licenses are incompatible. Alas! We'd love to hae > > someone else develop this. > > Looking at the license from Marc-André's starship site > (http://starship.python.net/~lemburg/) > > ------------------------------------------------------------------------------- > Redistribution of this software or modifications thereof for commercial use > requires a separate license which must be negotiated with the author. As a > guideline, packaging the module and documentation with other free software > will be possible without fee or royalty as described above. This license does > not allow you to ship this software as part of a product that you sell. > ------------------------------------------------------------------------------- > > If Zope doesn't qualify as "free software" here (I don't know if he means only > GPL, or if Zope's "OpenSource" designation is enough), why not ask about > licensing the code compatibly for use with Zope (a la Medusa)? > > Even in the worst case, I believe Zope could bundle a DA for mxODBC, and require > that the user install mxODBC separately. I've had this dicussion quite a few times before. I am willing to make mxODBC free for use in Open Source products like Zope. Use for other purposes would not be covered by the license though, so you can't just extract it from Zope and use it separately. DC didn't like this, so we didn't come to an agreement. That's just about what sums up this discussion. Note that mxODBC will go commercial with the 2.0 release. It'll be free for non-commercial use and there'll be a small fee for commercial installations. I have to take this step to finance further development on it, because keeping up to ODBC and the fast moving RDMS market has become way too time consuming. Sorry, but that's the way it goes... As result of this funding I expect to be able to include new cool features (hooks into the data conversion process, bulk operation support, ODBC bridging, etc.) and support for even more database backends. -- Marc-Andre Lemburg ______________________________________________________________________ Y2000: 50 days left Business: http://www.lemburg.com/ Python Pages: http://www.lemburg.com/python/

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