November 2001 - Zope

exUserFolder
by Prof. Andreas Gerber 21 Nov '01

21 Nov '01

Every attempt to install exUserFolder ends with the same error message if I try to access any object below the folder in which exUserFolder is installed Error Type: ValueError Error Value: unpack tuple of wrong size I use a folder named "test" to install exUserFolder. We are using zope 2.4.1 and exUserFolder v. 0_10_0. Andreas

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Site Error Messages
by Michael 21 Nov '01

21 Nov '01

I am trying to disable the traceback which appears in site error messages under "view source". I located Application.py under lib/python/OFS and also HTTPResponse.py under lib/python/ZPublisher, but am not sure where to go from here. I was able to make "site maintainer" hot using mailto:, and got rid of the paragraph telling you to view source, but I cannot figure out how to eliminate the traceback. Any suggestions? -- Michael Lewis

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-S option (was RE: [Zope] RE: Caching...)
by Stuart Nicholson 21 Nov '01

21 Nov '01

-S while running as a service under Windows (and probably as a daemon under Unix although I'm in Win32 land) seems to add a 'Restart' button to your Zope control panel. Thus you can restart Zope from the management interface which is kinda handy, assuming Zope is still happy to present the management interface to you. And you are quite correct this option doesn't appear to be documented anywhere. Stuart Nicholson Software Engineer wirelessdata - making data fly -----Original Message----- From: Michael Fraase [mailto:mfraase@farces.com] Sent: Wednesday, 21 November 2001 4:20 p.m. To: zope(a)zope.org Subject: [Zope] RE: Caching... I wasn't going to respond to this, but I can't resist. Comments inline below. -- Michael Fraase ARTS & FARCES LLC mfraase(a)farces.com www.farces.com PGP Fingerprint: 3D85 F3F4 9E65 4949 176A 260C CB47 190D C864 9A96 > -----Original Message----- > > This discussion is so pointless... Pointless to whom? I'm learning a good bit. > > FYI Google has upwards of 10.000 (thats TEN THOUSAND) linux > machines serving as frontends for their service. And although > Google's pages are dynamic, they're basically the same script > run over and over again with little or no images. So caching is not > the only option; its just that I'm sure you dont have Google's budget. > > What you're trying to do is asking Zope to DYNAMICALLY generate > Squishdot pages (probably full of database accesses and images). But > you're doing this on a PC (no hardware specs were specified) running > Windows (!) and on a DSL line. Hardware specs were most certainly provided (P3 850MHz 768MB RAM). I hate to be put in the position of defending Microsoft, but the OS didn't fall over. Neither did my DSL connection. Zope did. As of about 8:00 PM CST today my site has served more than 120,000 pageviews. Not bad, and it's settled down now, but I was having to restart Zope every hour or so for most of the day. > > If you try to do something similar with ANY OTHER platform (lets say > Apache+PHP+PHPNuke; or IIS+ASP+some forum software or other) > you're also going to get into the same kind of problems. Agreed. But I'm not sure the other options would fall over. > > If you compound this with the fact that you're also clueless (e.g running > Zope without knowing what -S is for; or, for that matter, running any > software without knowing what you're doing), you're in for a lot of trouble. > Please, dont answer "I'm a writer, not a programmer". THAT is precisely > your problem. You want to be able to build rockets without taking a course > in rocket science. Dont misunderstand me; you can still fire rockets or > build amateur rockets; just dont try to reach the moon. First of all, I never claimed to be cluefull. That's why I came here and asked the question. But neither am I clueless. The -S switch has been bothering me for a while. Do a search on zope.org for "command line switches" nothing. Nothing in any of the Zope documentation that I can find. Nor in any of the three Zope books currently in print. Even the Windows-specific doc doesn't say anything about the -S switch. Being a writer/information architect isn't my problem. Nor is it relevant to this issue. Get used to it; we're here and we need your help. But you need our help just as much. And to use your metaphor, I have no interest in building rockets, only flying them. Better get used to that too; there are a lot more of us than there are of you. > > Here are some tips: > > - enable caching on Zope Done and already cited. > - change from Windows to Linux Maybe, but again, Windows didn't fall over--Zope did. > - install more RAM on your PC 768Mb is the maximum I can install in what I've got. Should be adequate. There's no evidence of not having enough memory caused Zope to fail. > - get more CPU for your PC Again, there's no evidence that lack of CPU horsepower caused Zope to fail. > - put Squid in front of your Zope Excellent advice for Linux users. > - fine tune your Zope to use only the necessary command line switches So what's -S for? As stated in a previous message the only other switches I'm using set the web port and the WebDAV port. > - pack your Zope database frequently I do. At least weekly, sometimes daily, today it was every few hours. > - stop all the other software that you might have running (i.e. dedicated > server) Zope's all that's really running. > - create static versions of the most accessed page(s) That's a good idea. > - you might have a memory leak somewhere; plug it > > We're running a consumer portal with about 1 million hits per day using > 2 frontends (regular PC machines) connected to 1 backend (server PC). > > C U! > > -- Mario Valente _______________________________________________ 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 ) ---------------------------------------------------------------------- The information contained in this communication is intended solely for the use of the individual or entity to whom it is addressed and others authorised to receive it. 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RE: [Zope] please take a look at this, it's probably really easy, but I'm totally stuck
by Jacob Singh 21 Nov '01

21 Nov '01

Sorry that was typo, I do have it right in my prog -----Original Message----- From: Richard Jones [mailto:richard@bizarsoftware.com.au] Sent: Tuesday, November 20, 2001 10:20 PM To: Jacob Singh Subject: Re: [Zope] please take a look at this, it's probably really easy, but I'm totally stuck On Wednesday 21 November 2001 13:59, Jacob Singh wrote: > So here is my tragedy: > I have an SQL query which pulls a record from a database. One of the > fields is called file1. It contains a path to a file (i.e. > media/inline/asdasd.jpeg). This file is accessible through LocalFS. > LocalFS requires a syntax like media['inline']['asdasd.jpg'], so I wrote > a script to convert the Unix style path to something LocalFS can > understand. This works fine. Here is the code I use in my DTML doc to > render asdasd.jpg: My initial comment is that you're referring to the same file as having an extension ".jpeg" and then ".jpg"... this would cause a key error... Richard

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please take a look at this, it's probably really easy, but I'm totally stuck
by Jacob Singh 21 Nov '01

21 Nov '01

So here is my tragedy: I have an SQL query which pulls a record from a database. One of the fields is called file1. It contains a path to a file (i.e. media/inline/asdasd.jpeg). This file is accessible through LocalFS. LocalFS requires a syntax like media['inline']['asdasd.jpg'], so I wrote a script to convert the Unix style path to something LocalFS can understand. This works fine. Here is the code I use in my DTML doc to render asdasd.jpg: <dtml-call expr="REQUEST.set('imgpath',makeLocalFSPath(file1))"> <dtml-var "_.getitem(imgpath,1)" null="_[media['none.gif']]"> The first line calls the pythinon script that will make the LocalFS path. The second one endeavors to render the image using DTML's built in MIME to HTML technology which is necessary because using <IMG src=..... would not give me the with and height and is bad practice anyway. The null tag is just to shove that empty image marker in in case there is nothing in the field. When I call the page it gets a key error Error Type: KeyError Error Value: media['inline']['asdasd.jpeg'] But if I put <dtml-var "media['inline']['asdasd.jpeg']"> in any document in renders just fine. So basically the variable value gets rendered, but since It's not a variable but an expression, Zope doesn't know what to do. Oh and I tried putting double quotes on imgpath via the makeLocalFSPath function to no avail. Thank you for your help Jacob

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RE: [Zope] Urgent help needed: Zope falls over under moderate loa d
by sean.upton＠uniontrib.com 21 Nov '01

21 Nov '01

Squid load balances ZEO clients using a round-robin approach. Squid does a name lookup using DNS or /etc/hosts, and caches those values, so when you run Squid as an accelerator, it will round-robin between all IPs it has in its IP cache for a given domain name. Virtual hosting is handled using a VHM in Zope, and a redirector in Squid (fills same role as mod_rewrite in Apache). With a redirector, you do not need to specify virtual in the httpd_accel_host option, as it is ignored for rewritten URLs... pyredir is a very easy to modify redirector written in Python... With Squid in front of Zope, you can use accelerated HTTP cache managers to explicity tell Squid cache info, along with any RAM cache managers you need... Sean -----Original Message----- From: bak [mailto:kedai@kedai.com.my] Sent: Tuesday, November 20, 2001 5:27 PM To: Chris McDonough Cc: zope(a)zope.org Subject: Re: [Zope] Urgent help needed: Zope falls over under moderate load On Wednesday 21 November 2001 05:38 am, you wrote: > The big "bang for buck" solution provider is caching. Assuming that > you had no problems *before* the slashdotting, that will solve your > problem because it will cause Zope to need to serve far fewer > requests, closer to the number of requests you normally get. And this > is (I assume) the outcome that you actually want. I highly recommend > setting up a caching proxy in front of Zope if this sort of load will > be recurring. It's way faster and cheaper than trying to understand > the problem deeply. ;-) Most commercial sites are developed using > this principle, AFAICT. butting in with questions :) with 2.3.x, RAM Cache Manager has no refresh/expire/max_age feature. you get that with 2.4.x and above only. so that might give users stale pages. i know, i've encountered it. i *really* think that there should be a RAM Cache Manager howto/best approach. i'd like to write it, but i need inormation. i'm currently caching my pages, but i'm not sure i'm doing it right. properties such as REQUEST variables (there's two forms available. 1- at the method's page, 2-at the cachemanager page), statistics (seems that the url does have some effect on the cache hit rates), etc. confirmation from product author/zc would really help. i guess that i should really look at the source ..., and i will. today. now, for putting squid in front of zope. how do others do this, when you have more than one server (using zeo). there's the virtual parameter in squid, but i don't get it. any body done this? my solution for now is putting in caching manager, and if *really* necessary adding in another zeo client. thanks _______________________________________________ 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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editors
by Jacob Singh 21 Nov '01

21 Nov '01

What do people use for editors? I am so sick of editing through the browser, it is hell. But I don't know where else to turn because the browser interface provides such great debugging.

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Re: Re: [Zope] editors
by Harlow Pinson 21 Nov '01

21 Nov '01

JASC Namo http://www.jasc.com/products/namo/ Works better than Dreamweaver for editing Zope, but is not perfect. It edits objects with no file extension, but editing is still remote, requiring a local copy of the object. Maybe there's a way around this? Have not explored Namo WEBDAV yet... Just FTP. Harlow Pinson Indepth Learning Email: hpinson(a)indepthl.com Web: http://www.indepthl.com Voice: 505-994-2135 FAX: 208-475-7678

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ATTENTION! Well-Paid Job in the Internet!
by Please Read IT Carefully! 20 Nov '01

20 Nov '01

-------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- (This safeguard is not inserted when using the registered version) -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- (This safeguard is not inserted when using the registered version) -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- -------------------------------------------------------------------------- --------------------------------------------------------------------------

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RE: [Zope] Caching... (and squid question added....)
by Schmidt, Allen J. 20 Nov '01

20 Nov '01

On your Linux boxes running Zope and Squid, do you have any issues with users accessing your site with AOL dialup and the AOL browser? This question goes out to anyone who cares to answer, also... We are moving to a Zope on Linux with Squid setup within the week. Currently on Windows 2000 and Zope 2.4 with a Windows version of Squid. The site moves very fast in general but now AOL users are complaining of 5+ minutes load times if it loads at all. Has anyone come across this? Thanks -----Original Message----- From: Mario Valente [mailto:mvalente@ruido-visual.pt] Sent: Tuesday, November 20, 2001 4:42 PM To: zope(a)zope.org Subject: Re: [Zope] Caching... At 21:06 20-11-2001 +0000, Chris Withers wrote: >Chris McDonough wrote: >> >> Usually, if you don't cache or serve only static content, you can't >> running a high-volume site using Zope or mod_perl or ASP or >> whatever-else; it's as simple as that. > >What about something like Google? How do they get around it? > >I'm sure caching isn't the only option... > This discussion is so pointless... FYI Google has upwards of 10.000 (thats TEN THOUSAND) linux machines serving as frontends for their service. And although Google's pages are dynamic, they're basically the same script run over and over again with little or no images. So caching is not the only option; its just that I'm sure you dont have Google's budget. What you're trying to do is asking Zope to DYNAMICALLY generate Squishdot pages (probably full of database accesses and images). But you're doing this on a PC (no hardware specs were specified) running Windows (!) and on a DSL line. If you try to do something similar with ANY OTHER platform (lets say Apache+PHP+PHPNuke; or IIS+ASP+some forum software or other) you're also going to get into the same kind of problems. If you compound this with the fact that you're also clueless (e.g running Zope without knowing what -S is for; or, for that matter, running any software without knowing what you're doing), you're in for a lot of trouble. Please, dont answer "I'm a writer, not a programmer". THAT is precisely your problem. You want to be able to build rockets without taking a course in rocket science. Dont misunderstand me; you can still fire rockets or build amateur rockets; just dont try to reach the moon. Here are some tips: - enable caching on Zope - change from Windows to Linux - install more RAM on your PC - get more CPU for your PC - put Squid in front of your Zope - fine tune your Zope to use only the necessary command line switches - pack your Zope database frequently - stop all the other software that you might have running (i.e. dedicated server) - create static versions of the most accessed page(s) - you might have a memory leak somewhere; plug it We're running a consumer portal with about 1 million hits per day using 2 frontends (regular PC machines) connected to 1 backend (server PC). C U! -- Mario Valente _______________________________________________ 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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