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RE: [Zope] Zope, performance and multithreading (beginner questio ns)
by Michel Pelletier 09 Jul '99

09 Jul '99

> -----Original Message----- > From: Samu Mielonen [mailto:ex@uiah.fi] > Sent: Friday, July 09, 1999 5:36 AM > To: Zope@Zope. Org > Subject: [Zope] Zope, performance and multithreading (beginner > questions) > > > Hello, > > another set of newbie questions from somebody who's just > begun with Zope: > > If I try to aim for moderately good (or beyond that) performance > with Zope, what should I use for data storate (Z ODB3, MySql)? That decision should be based purely on the structure of your data. if it's relational, go MySQL, if it's not, don't. Performace comes from good application design. > > What about http-server, if perfomance needs to be fast for > multiple concurrent dynamic pages with a lot of persistent > storage access? Apache, Medusa, something else? Apache might be a bit slower in terms of latency (total time to complete request) due to a moderatly expensive fork() call that happens in PCGI but we've seen PCGI do a million hits a day on modest hardware, nothing to sneeze at. > > Also, will I benefit (performance wise) from running > Zope under Linux in a 2 CPU SMP configuration? (i.e. is > it multithreaded properly to take advantage of more > than one cpu)? Sure. Please note that Python has a global interpreter lock, which means that even if the program is multi-threaded, only one thread can be interpreting python code at at time. This does not exclude, however, computations and IO from happening simultaneously, and of course other processes which are involved like Apache (if you use it) can take advantage of the other processor. > > Any other issues that I should consider when aiming > for fast response times under a heavy load? (i.e. > specific coding/design approaches, except doing > most everything in C :) > Zopes response time is good, I've been doing some informal benchmarks and I can get about 40 responses per second, this is very impressive for a dynamic system, I'd be interested in seeing how the other Java based app servers compare (they probably don't). Other than that, good design is your friend. -Michel > Best regards, > Samu Mielonen > > -- > "Zone of proximal development - ...the conceptual space or > zone between what > a [human] is capable of doing on his or her own and what [he/she] can > achieve with assistance from ... a more capable peer." - The Penguin > Dictionary of Psychology > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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distinguishing users from same ip
by Robin Becker 09 Jul '99

09 Jul '99

Is there any way to distinguish between anonymous users from the same ip? I'm planning on using zope to allow schoolkids to access a tax planning model. Most machines have their own ip, but some may allow multiple simultaneous access (eg Linux boxes). An alternative might be to allow some kind of user login. -- Robin Becker

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Can I change the authentication realm programmatically?
by Tony McDonald 09 Jul '99

09 Jul '99

Hi all, I need to interface with some systems that have their own authentication systems (.htaccess of all things - they can't get mod_perl to work properly, sigh). Unfortunately, the realm that they've chosen is not 'Zope' :) What I'd like to do is authenticate against the realm that they've chosen by using the UserDB product. Then just jump to their pages and (hopefully) because I'm using the correct realm, I'll be let into their system. Trouble is, I can't figure out where to fill in the gap realm='SST Tutor', it seems that 'Zope' is hard-coded in to the source. Anyone got any ideas? tone ------ Dr Tony McDonald, FMCC, Networked Learning Environments Project The Medical School, Newcastle University Tel: +44 191 222 5888 Fingerprint: 3450 876D FA41 B926 D3DD F8C3 F2D0 C3B9 8B38 18A2

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pcgi problems
by Ruben Malchow 09 Jul '99

09 Jul '99

that's 3000, of course, not 30.000 ...

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RE: [Zope] Documentation
by Paul Everitt 09 Jul '99

09 Jul '99

Framemaker. The HTML output by Frame is actually uglier than what is on the web -- we have a script that postprocesses it. --Paul > -----Original Message----- > From: Andreas Kostyrka [mailto:andreas@mtg.co.at] > Sent: Thursday, July 08, 1999 6:02 PM > To: zope(a)zope.org > Subject: [Zope] Documentation > > > Hi! > > I've been wondering, what system DC is using to create the ZOPE > documentation? > > Andreas > -- > Win95: n., A huge annoying boot virus that causes random > spontaneous system > crashes, usually just before saving a massive project. > Easily cured by > UNIX. See also MS-DOS, IBM-DOS, DR-DOS, Win 3.x, Win98. > > > _______________________________________________ > Zope maillist - Zope(a)zope.org > http://www.zope.org/mailman/listinfo/zope > > (For developer-specific issues, use the companion list, > zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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pcgi_publisher blocks?
by Ruben Malchow 09 Jul '99

09 Jul '99

i tried bashing zope.1.10.3 running with apache 1.3.6 some by doing this: in index_html:    ...  (like 30 time or so) ------------------------ and in p    ...  (like 100 times) ------------------------ and in p2 asdfasdfasdf<BR> so, to me, that makes like requesting index_html would result in 30.000 lines of text. fine. but for several minutes, this is what was happening: 13694 apache -25 0 32M 30M run 14:39 92.48% 91.68% python ... the pcgi_publisher? i don't know, actually, but that's what i would assume. problem is, i did this: kill 13694 and now Zope won't start, so i cannot reproduce the error. all i get is this error message: <html> <head> <title>exceptions.ImportError</title> </head> <body> Sorry, a SERIOUS APPLICATION ERROR occurred.<p>  </body> </html> ... and that happens although that files is most definitely present. can anyone help? i'd really appreciate that. and one more question: when does Zope serialize incoming requests? what exactly will happen when i request an object that will result in a large and time-intensive sql query being send to an external relational database - will the orb stop accepting requests until that one request has been dealt with? why did Zope just block when i requested index_html as in the the example above? thanks ruben

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calendar problems
by Robin Becker 09 Jul '99

09 Jul '99

I tried the following simple examples with #calendar   gives an unknown timezone error. I'm using zope2 under win95 osr2.   appears, but any selection on the widget causes errors of the form Error Type: DateTimeError Error Value: Invalid date: 1999-7-7 what am I doing wrong? -- Robin Becker

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RE: [Zope] why is there no put in urllib ?
by Alexander Staubo 09 Jul '99

09 Jul '99

You can easily write an "urlput()" function wrapping around calls to httplib, which definitely supports PUTs. (In fact, urllib's urlopen() is itself mainly just a thin wrapper around httplib and ftplib.) See the Python documentation for details. -- Alexander Staubo http://www.mop.no/~alex/ "What the hell, he thought, you're only young once, and threw himself out of the window. That would at least keep the element of surprise on his side." --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_ >-----Original Message----- >From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of >Joachim Schmitz >Sent: 9. juli 1999 14:07 >To: zope(a)zope.org >Cc: python-list(a)cwi.nl >Subject: [Zope] why is there no put in urllib ? > > > >hi, > >may be this is a total dump question. But it would allow us Zopistas to >upload our dtml pages with a simple python script to the Zope-server. > > >Gruß > >Joachim Schmitz > >WWW-Consultant > >email: js(a)ac-copy.net >tel: +49-241-89491-0 >fax: +49-241-89491-29 > > > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://www.zope.org/mailman/listinfo/zope > >(For developer-specific issues, use the companion list, >zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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RE: [Zope] zope2+netscape security?
by Alexander Staubo 09 Jul '99

09 Jul '99

If you do a "Open in New Window" Netscape will do just that -- open another window; it'll run inside the same process and share the resources of the previous window. What you should do is simply start a new copy of Netscape. Btw, IE also allows multiple windows inside one instance, but is clever enough not share to share the authentication information across windows. -- Alexander Staubo http://www.mop.no/~alex/ "What the hell, he thought, you're only young once, and threw himself out of the window. That would at least keep the element of surprise on his side." --Douglas Adams, _The Hitchhiker's Guide to the Galaxy_ >-----Original Message----- >From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On >Behalf Of Robin >Becker >Sent: 8. juli 1999 20:31 >To: zope(a)zope.org >Subject: [Zope] zope2+netscape security? > > >I am running a local 127.0.0.1 Zope2 under win9x. Using netscape I log >in as manager. I start another (simultaneous) copy of netscape and I >find I have the same permissions as the logged in browser. If I use IE >as the second browser I don't. I assume that this is a problem with >netscape. >-- >Robin Becker > >_______________________________________________ >Zope maillist - Zope(a)zope.org >http://www.zope.org/mailman/listinfo/zope > >(For developer-specific issues, use the companion list, >zope-dev(a)zope.org - http://www.zope.org/mailman/listinfo/zope-dev ) >

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Zope, performance and multithreading (beginner questions)
by Samu Mielonen 09 Jul '99

09 Jul '99

Hello, another set of newbie questions from somebody who's just begun with Zope: If I try to aim for moderately good (or beyond that) performance with Zope, what should I use for data storate (Z ODB3, MySql)? What about http-server, if perfomance needs to be fast for multiple concurrent dynamic pages with a lot of persistent storage access? Apache, Medusa, something else? Also, will I benefit (performance wise) from running Zope under Linux in a 2 CPU SMP configuration? (i.e. is it multithreaded properly to take advantage of more than one cpu)? Any other issues that I should consider when aiming for fast response times under a heavy load? (i.e. specific coding/design approaches, except doing most everything in C :) Best regards, Samu Mielonen -- "Zone of proximal development - ...the conceptual space or zone between what a [human] is capable of doing on his or her own and what [he/she] can achieve with assistance from ... a more capable peer." - The Penguin Dictionary of Psychology

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