June 2002 - Zope - Zope lists

RE: [Zope] eval in PyScript
by Chris Beaven 17 Jun '02

17 Jun '02

Try this way: req=container.REQUEST if req.has_key(field_name): val = req[field_name] if val != None: return val return '' -----Original Message----- From: Aseem Mohanty [mailto:aseem@neurobehavioralsystems.com] Sent: Monday, 17 June 2002 10:38 p.m. To: zope(a)zope.org Subject: [Zope] eval in PyScript I cant seem to be able to call eval() from my script... Do I have to do something special to make it happen? The error: Error Type: NameError Error Value: global name 'eval' is not defined the script: req=container.REQUEST if req.has_key(field_name): val = eval('req.'+field_name) if val != None: return val return '' TIA AM -- ================================================================== Aseem Mohanty Neurobehavioral Systems Inc, 828 San Pablo Ave, Albany, CA 94706 (R) 510 7696011 (M) 510 3014871 (O) 510 5279231 ================================================================== "I saw `cout' being shifted "Hello world" times to the left and stopped right there!!" -- Steve Gonedes ================================================================== _______________________________________________ Zope maillist - Zope(a)zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )

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2 zope faster 1 zope running
by Андрей Пучин 17 Jun '02

17 Jun '02

Hello! I have tested ZOPE under heavy load (about 100-200 users simultaneously) and noticed that 2 zope running on 1 PC works (processing requests) faster than 1. Zope runs under Windows XP with -t 10 options. Test were made with RationalRobot. What's wrong with my ZOPE installation?? Is there any performance tune tricks?? Thanks Andrew

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how to get started ?
by hans schneidhofer 17 Jun '02

17 Jun '02

hi, have downloaded zope a few days ago, now I have installed the packages as a few rpm-packages for RH. But trying to say "./start & results in "file or directory not found" hmmmm - whats going wrong here - any help is really very welcome thanks in advance for some hints hans schneidhofer

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Is there any Firebird-Interbase user ?
by Ivan Franinović 17 Jun '02

17 Jun '02

Hi to all! With Z SQL Method I try to: insert into omreznaskupina (STEVOMREZJ,IMEOMREZNE) values ( <dtml-sqlvar stevomrezj type="string">, <dtml-sqlvar imeomrezne type="string"> ) I get no new data using Z Firebird DB while using Z Gadfly DB works fine. Thanks! Ivan

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Error code 11 !!???
by Gilles Lenfant 17 Jun '02

17 Jun '02

Hi, My Zope 2.5.1 box (FreeBSD) often crashes with this in the console log... 2002-06-17T18:11:13 ERROR(200) zdaemon zdaemon: Mon Jun 17 18:11:13 2002: Aiieee! 53066 exited with error code: 11 This happens in an untimely manner when searching in a ZWiki ! Then It restarts... Any idea ? Thanks in advance. --Gilles

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Re: AW: [Zope] 2 zope faster 1 zope running
by Matthew T. Kromer 17 Jun '02

17 Jun '02

Copying Zope @ Zope.org since this is useful information. My numbers below are approximations, not hard figures. Its derived from experimental observation. A python bytecode, on average, executes about 50 machine instructions. You probably want to let a whole CPU quanta expire before voluntarily switching threads. Generally a CPU quanta will be about 5 milliseconds. A 1GHz pentium will execute about 1,000,000 instructions / millisecond, or about 100,000 python bytecodes / quanta. The typical Zope publishing path is about 1,000,000 bytecodes or more -- so letting that path be interrupted 10 times or more is overkill (for Zope). Using my numbers you could argue for a much higher ratio. (Ie, if you believe me, Zope "wants" a sys.setcheckinterval(100000) on a 1Ghz machine. From experimental observation I have detected a levelling off in benefit at about pystones/50. This becomes very noticable on a multiprocessor machine. I believe the levelling off effect comes from other normal 'blocking' operations inside Zope which cause one thread to suspend. Hence the factor of 500 discrepancy :) The rationale is due to overhead in thread switching, and "thruput" optimization. Consider the following example: Two threads wish to count from 1 to 10. After each thread counts a single digit, they switch. A system clock is incremented after each count: Sys Thr1 Thr2 1 1 2 1 3 2 4 2 ... 19 10 20 10 The average time for each thread to complete is 19 + 20 / 2, or 19.5. Now consider the example where thread 1 is allowed to run to completion before thread 2: Sys Thr1 Th2 1 1 2 2 ... 10 10 11 1 ... 20 20 Here, the average time for each thread to complete is 10 + 20 / 2 or 15. So, it costs 30% more work to let each thread run "concurrently" without factoring in any overhead from the actual act of task switching, which in my example was zero, but can never actually be zero. By increasing sys.setcheckinterval (the default Python value is 10!) we allow more work to be done by each thread before it yields control to another thread. The astute observer would also be able to note that the total system work for CPU BOUND processes can never exceed the speed of serial processing. Because Zope is primarily CPU bound, fewer threads tend to be better. I believe that a corollary to this is the effect people observe when Zope undergoes "superlinear" degredation -- ie, too many things get caught up in Zope (because too many threads are started). I am sure this isn't the *only* reason that happens (I dont have a good observation suite to analyze it). However, once internal queues for work build up in Zope, they are very difficult to dissipate -- you have to have a substantial lessening in the work arrival rate. N.B. If you use my figure of 1,000,000 bytecodes as a predictor of the Zope publishing path, you'll realize that this is about 5 cpu quanta (again using a quanta of 5ms) on a 1Ghz machine which is a Zope publishing rate of about 40 pages/sec. For some applications this is an optimistic value. For others, Zope can publish at a faster rate. This is not intended to cover ALL applications, just a 'good guess' at one. I suggest running 'ab' or similar against a representative sample of YOUR applications pages to convert pages/sec into a guesstimate of the "cost" of your application. On Monday, June 17, 2002, at 10:05 AM, oliver.erlewein(a)sqs.de wrote: > Hi > > I've set my new interval from "-i 32" to "-i 200" as my Pystones is > about 11000. I'll check what changes I will see. Where did you get that > ratio from or why is it so? >

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Versions and Sessions
by Milos Prudek 17 Jun '02

17 Jun '02

Session management built in Zope 2.5 is incompatible with Versions. Is this permanent and unresovable, or will this incompatibility get removed in Zope 2.6? In Zope 3? -- Milos Prudek

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Passing not-string variables to a python script
by Dianne Van Dulken 17 Jun '02

17 Jun '02

Hi, I was hoping that I could get some help with this one, without looking too thick. I'm finding whenever I call a python script from within a zope page (as opposed to submitting a form to a script), it assumes that every parameter is a string. This isn't always the case, in fact, it is rarely the case. I was wondering if there was anyway that I could force it to know what type it was. I am particularly interested in passing in lists. The way I call it at the moment is like this: <dtml-var expr="script1(var1='blah', var2=['a', 'b', 'c'])"> etc. I tried calling them like var1:string, var2:list, but I get a syntax error. Ditto when I try setting types in the parameter list on the script option. I am using the "python script" default option that comes with zope, as opposed to importing one. Any help would be gratefully appreciated. I am certain there must be some way, but I haven't been able to discover it myself, and I certainly don't want to have to start every script with a split on , Thanks Di

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RE: [Zope] pcgi error while inserting data into db
by Ivan Franinovic 17 Jun '02

17 Jun '02

Thanks John! With this email I was just trying to get some ping from the mail list. This is my second email. The email is send before this one was field with more detail but I had no answer. I set up the testing environment with zope, firebird, Zfirebirddb and kinterbasedb on linux redhat: Zope Version (Zope 2.4.3 (source release, python 2.1, linux2), python 2.1.1, linux2) Python Version 2.1.1 (#1, Aug 13 2001, 19:37:40) [GCC 2.96 20000731 (Red Hat Linux 7.1 2.96-96)] System Platform linux2 I pumped a database from acces to firebird and I fond no big problem browsing it. When Im trying to insert into omreznaskupina (STEVOMREZJ, IMEOMREZNE) values ('666','satan'); with Z SQL method I get ! Temporarily Unavailable The resource you requested is temporarily unavailable - please try again later. C-Runtime errno: Success PCGI Error: (116) unable to connect, path=/var/run/pcgi.soc, fd=5 Explanation: I get the same error when Im trying to restart zope from ControlPanel. ANY IDEA WHAT CAUSES THESE ERRORS OR HOW CAN I TRACK THAT KIND OF ERRORS???? Thanks to ALL! Ivan ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- ----------------------- -----Original Message----- From: jnials(a)server.thanesoft.net [mailto:jnials@server.thanesoft.net]On Behalf Of Jon R. Nials Sent: Friday, June 14, 2002 5:33 PM To: Ivan Franinoviæ Subject: Re: [Zope] Is there anyone who can help? Ivan Franinoviæ wrote: > > Hi ! > > I'm new on the list and I'm also new in zope. It is also my first time > trying to get help from any mailing list. > I'm trying to set up a dynamic page using zope and firebird and I'm stuck! > So far I managed to set-up everything by my self. > I get pcgi error when I'm trying to insert simple data into table. > > Is there anyone who can help? > Some suggestions for getting help. There's not enough info here to help you, so you might want to post the code you are using to insert the data. You probably also want to post the results of a show table so folks can see the table you are trying to insert into. -Jon

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Re: [Zope] Pbs with ExternalEditor win32
by H.de.Wit＠SFK.NL 17 Jun '02

17 Jun '02

>As a newbie I am having problems getting External Editor to work on Windows >(98). There is a new version (0.3) that should support windows. http://www.zope.org/Members/Caseman/ExternalEditor/0.3-release-news The old one didn't, and there i stopped. Did you try it with 0.3 or with the older one? Met vriendelijke groeten, Hans de Wit Stichting Farmaceutische Kengetallen Postbus 30460 2500 GL DEN HAAG Tel. 070-3737448 Fax 070-3737445

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