June 2000 - Zope - Zope lists

ZEO ..again ;)
by Bill Anderson 10 Jun '00

10 Jun '00

OK, after reveiwing the ZEO FAQ, I realized that we seem to be a few weeks behind schedule. Is there any updates on a time frame? I know this would certainly help amk out with his project, and would certainly help me out, even in non-zope apps (I am working on moving a Sybase/Zope setup to straight ZODB with ZEO, but can't get an approval until we at least have an idea of when we can try the code). Half-working code would be fine for me, but last I heard the early-testers indicated it was definitely releasable. :)

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[Ann] Zope 2.1.6: <dtml-in> patch It provides complete batching info at sequence start *and* end It provides complete batching info at sequence start *and* end
by Dieter Maurer 10 Jun '00

10 Jun '00

The Zope 2.1.6 <dtml-in> provides batching information for the previous batch at the start and end of the sequence. Batching information for the following batch, however, is only available at sequence end. This makes it difficult to provide uniform navigation (to previous/next batch) both before and after the sequence. Moreover, if the current batch size is "1" (e.g. size=1), then <dtml-in> provides batch info for the following batch only for the sequence's first element. For all other elements only previous batch information but no following batch information is available. This is a bug. <dtml-in> provides modes "previous" and "next" that do not render the sequence but only provide the respective batching info. The problem with this solution is redundancy: the same parameters must be given to "<dtml-in previous>", "<dtml-in>" and "<dtml-in next>" to obtain reliable information. This is error prone and makes it difficult to separate navigation (for different sequences with different <dtml-in> parameters) in a general navigation method. The patch at URL:http:www.handshake.de/~dieter/pyprojects/zope/dt_in.pat provides uniform batching information both at the start and at the end of the sequence. A batch size of 1 is correctly handled. Dieter

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Re: [Zope] Multithreading in zope and python
by Martijn Pieters 10 Jun '00

10 Jun '00

[Let's keep zope(a)zope.org in the loop. Don't just rely on me] On Sat, Jun 10, 2000 at 03:28:21AM -0400, sudhir(a)earthling.net wrote: > > How do you know it isn't using multithreading? If you are using ZServer > > (standalone or behind anotger webserver), you are using multithreaded Zope. > > And if you start Zope with z2.py unaltered, you are using ZServer, and only > > took out -d from the start script, you are definetly running ZServer, and > > therefor multithreaded. > > > > Do you maybe mean that Zope doesn't fork off into the background, but instead > > is still attached to the terminal? > > I sure am using ZServer, without any other webserver. > Maybe I posed the wrong question. Here is what I am coming from. > > To test the performance of my webserver, I wrote a client using python's > httplib, that accesses my site 100 times. First I ran one instance of the > the client. Then I ran 10 concurrent instances of client. To my surprise, > time taken was absolutely linear, i.e. time taken for 10 concurrent > instances was 10 times more than that with 1 instance. > > Now it sure is possible to get this kind of behavior even with > multithreading, but I was not expecting this and suspected that > multithreading is not on. > > I am using RedHat 6.1 on a Pentium II 400 MHz. What all can I do to increase > the performance of my webserver? > > Currently, I am using MySQL and all the database accesses is done inside > external methods, using MySQLDA. Do you thing using ZSQL is going to boost > the performance? There are two things that may have gone wrong here: - You testing program isn't concurrent, even though you think it is. - I don't know much about the MySQL db, but maybe your approach of accessing it causes requests to be serialized, thus your whole app to be serialized. You should probably test your client with a part of Zope that doesn't access the MySQL database first, to make sure that the problem doesn't lie with your client. You could also get 'ab' the Apache Benchmark program that comes with Apache to do your testing for you, as it is known to work. Accessing MySQL direct from your External Methods introduces a variable I cannot comment upon. Apart from that, using the MySQLDA would at least give you the advantage of being able to use the SQL Methods' caching mechanism. I understand that the CodeCatalog.com site gets much of it's speed because it leans heavily on this feature. The case study on Catalog.com can be found at: http://www.zope.org/Resources/CaseStudies/CodeCatalog/ -- Martijn Pieters | Software Engineer mailto:mj@digicool.com | Digital Creations http://www.digicool.com/ | Creators of Zope http://www.zope.org/ | The Open Source Web Application Server ---------------------------------------------

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logout
by James Cummings 10 Jun '00

10 Jun '00

Ok, since I haven't found this by searching the site or the mailing list archive, is it possible to logout as superuser? I would like to be able to login as a different user, but I haven't been able to find out how to do this. Thanks, James

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Multithreading in zope and python
by sudhir＠earthling.net 10 Jun '00

10 Jun '00

I am using Zope-2.1.6. I have python 1.5.2 with multithreading on. But my zope still runs in single thread. I have changed the start script, to have PYTHONHOME="/usr:$reldir" and taken out the -D flag. Any suggestions on how to turn on multithreading will be appreciated. Thank you, -- sudhir

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Re: [Zope] Problems with SybaseDA
by A J Wilson 10 Jun '00

10 Jun '00

I have experimented some more and I think I have isolated the problem by importing the module into python and playing with the code that uses it (eg db.py and DA.py). Firstly I found that I had to change some of the environment variables in the Makefile.pre.in to point to where Makdrake 7 stores python (ie /usr rather than /usr/local). Then I made sure that SYBASE and LD_LIBRARY_PATH were set in my shell before compiling the code. Next I imported sy_occ into python and started playing it (I made sure SYBASE and LD_LIBRARY_PATH were set correctly by inspecting os.environ). I found that in db.py there is a line of code "_context=sy_occ.cs_ctx_alloc()" which when called causes a segmentation fault and a core dump. When this line is commented out Zope can start successfully and thinks that the SybaseDA is correctly installed but obviously it doesn't actually work. I am using Jeff Rush's rpm version of Zope and have set SYBASE and LD_LIBRARY_PATH through .bashrc in user zope's home directory. Does this sound like the right way to do it? Can anybody help me. Thanks Austin >Date: Thu, 08 Jun 2000 01:09:21 -0600 >From: Bill Anderson <bill(a)libc.org> >To: zope(a)zope.org >Subject: Re: [Zope] Problems with SybaseDA >> A J Wilson wrote: >> >> Hi >> >> I have installed Zope-2.1.6 on my PC (Pentium running Mandrake 7) and >> it seems to work fine. However, I have tried installing the SybaseDA >> and am having trouble. I have downloaded and installed the common >> Sybase libraries, set the SYBASE path, complied it without errors and >> moved the sy_occ.so up one directory. However, when I restart Zope it >> fails and produces a core dump. There are no errors generated so I am >> having trouble diagnosing what is wrong. I can import the sy_occ.so >> into python without error, but if I try to import db.py and DA.py I >> get errors. These two scripts reference modules such as DateTime, >> zLOG, Missing, Globals, Shared.DC.ZRDB.TM, and >> Shared.DC.ZRDB.Connection - none of I can find. >> >> Can anybody please help? > Search the archives for Sybase. It is probable that while you have teh > variable set in your shell, it is not set in the process Zope runs. This > should be in the docs on SybaseDA, IMO.

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generic user folder 1.2.4
by technology＠mylinuxisp.com 10 Jun '00

10 Jun '00

Hello guys: today I have installed Generic user folder 1.2.4 Zope version 2.1.6 redhat 6.1 on apache with zope.cgi I have untared the tgz into the top level in /home/Zope I have restarted the zope several times. When I go to Zope management and "add new item" + "Generic user folder" I get to the "add a generic user folder" html page. I leave all the settings at defualt wich includes the "cookie based" authentication radio button selected. -------------------- I click add. Error type:KeyError Error Value:Parent_url ---------------------------- I try this in different folder levels in zope to make sure it isnt a path issue. I downloaded 1.2.2 and same thing. I did this on two different zope boxes similer configuration. thanks technology(a)mylinuxisp.com

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user contributions to Zope.org
by Graham Chiu 10 Jun '00

10 Jun '00

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 This has been mentioned before, but some sites like the main PHP one allow visitors to add comments to web pages. My thought was that this should be relatively easy to implement with the Zope.org site. A small form at the bottom of each page, URL0 indexed in a SQL table, and when a page is accessed, commentary is returned ordered by submission date. You may wish to allow only members rather visitors to make comments. Anything wrong with this scenario ( apart from comments not being Catalogued ) ? - -- Regards, Graham Chiu gchiu<at>compkarori.co.nz http://www.compkarori.co.nz/index.php Powered by Interbase and Zope -----BEGIN PGP SIGNATURE----- Version: PGPsdk version 1.7.1 iQA/AwUBOT9hrLTRdIWzaLpMEQLFfwCdFcoOFImah9VotLJuCGOw12KxIEkAn2+5 Cdhy/TF81iDBrBgC1l8Ao6Lb =oVHM -----END PGP SIGNATURE-----

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Referencing sql field in a direct traversal
by Jones, David H 09 Jun '00

09 Jun '00

I have set up a direct traversal sqlMethod which has as a DTML method The zsql method, sqlModel, is: select * from AP_MDL where <dtml-sqltest ap_mdl_no type=string> The direct traversal url is: http://e9999.rt.cs.boeing.com:8080/DB/sqlModel/777/asMeta The first DTML method I wrote, asMeta, operated correctly with the following code: <meta name="ap_mdl_no" content="<dtml-var ap_mdl_no>"> <meta name="ap_mdl_cd" content="<dtml-var ap_mdl_cd>"> <meta name="bus_no" content="<dtml-var bus_no>"> <meta name="ap_mdl_prod_ind" content="<dtml-var ap_mdl_prod_ind>"> Now I want to generalized the DTML method to work with any query. I would like to reference the fields, but haven't figured out how to. Can someone tell me how to reference the fields and field names returned in a direct traversal. Regards, David H. Jones Boeing Phantom Works, Mathematics and Computing Technology 425-865-6924 425-865-2964 (FAX) david.h.jones(a)boeing.com

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zopistas in vancouver?
by Karl Fast 09 Jun '00

09 Jun '00

I'm curious: are there any Zopistas in Vancouver? --karl Karl Fast ActiveState: Programming For The People http://www.activestate.com/

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