September 2005 - Zope

RE: [Zope] Zope startup error: Archetypes: IndexError: list index out of range
by Paul Sue 06 Sep '05

06 Sep '05

Chris Withers wrote: |> OK ... But surely, there must be some way to get Zope/Plone working on Solaris! |> |> I think we have Windows Server 2003 box I can try :) | |I'd suggest that is a better option than Solaris, there are more people doing it in the real world, and so you're more |likely to get help if something DOES go wrong... Fair enough, but surely there must be SOMEONE on this list that is running Zope/Plone on Solaris??? |Your best bet though, if to get a commodity linux box, which that |Win2003 box could easily be turned into ;-) I agree and am scavenging for one ;-) Paul

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attributes on a file
by Michael 06 Sep '05

06 Sep '05

hi, thanks for the help with my last (permissions) problem, i covered it by replacing the code with "known to work code" think it was being caused by a gettattrs call. could someone please tell me how I would modify the "file library" example to store an attribute with the file? (like the guest_name in message book) Thanks!! mike.

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RE: [Zope] Zope scalabilty and problems
by Kennamore, Matthew G [NTK] 06 Sep '05

06 Sep '05

Thanks everyone for their suggestions, bought a squid book today and I know what I'll be doing all weekend <grin> -----Original Message----- From: Chris McDonough [mailto:chrism@plope.com] Sent: Thursday, September 01, 2005 1:13 PM To: Kennamore, Matthew G [NTK] Cc: zope(a)zope.org Subject: RE: [Zope] Zope scalabilty and problems What you've got now is a pretty reasonable setup. Moving to 2.7.7 will likely not get you any "free" performance increases and it doesn't appear that there are any "critical" ZODB bugfixes relating to your problems since 2.7.3. FWIW, also, I'd venture a guess that moving "off Data.fs" (as you mentioned in your original email) may be quite costly, requiring a lot of application recoding. It also might not help solve the scaling problem you're having. It's a "high risk, potentially low reward" solution. You need something that is low-risk and potentially high reward, I'd suspect. Others have said this, but it bears repeating. The biggest "administrative" win you can get for the cheapest cost is to add an HTTP cache (like Squid or even Apache's mod_proxy) in front of your ZEO clients and to cause your Zope application to set the proper response headers which allow the cache server to cache (and thus serve) those pages on subsequent requests. This can be tricky when most of your traffic is authenticated because there is usually very little win and a lot of danger to serving up cached pages when a page in the cache represents a view that a privileged user sees when visiting the site. You typically don't want other people to see the same thing he does. As a result, typically people will say "pages that require authentication can't be cached" which isn't entirely true (you can cache them but it's often useless). However, even serving up fully static content that doesn't require any authentication like CSS, images, and so on can be a win. You might start there. HTH, - C On Thu, 2005-09-01 at 11:54 -0500, Kennamore, Matthew G [NTK] wrote: > Zope version 2.7.3 (planning to goto 2.7.7 soon with ZODB 3.2.9) > Pyhton is 2.3.4 > Apache 1.3 > > We have 943 users as of this minute with a bout 1000 objects being created a day (Lots of creates) > > -----Original Message----- > From: Chris McDonough [mailto:chrism@plope.com] > Sent: Thursday, September 01, 2005 12:51 PM > To: Kennamore, Matthew G [NTK] > Cc: zope(a)zope.org > Subject: Re: [Zope] Zope scalabilty and problems > > Your "tranaaction blocked" error messages seem to imply that either or > both of the following is true: > > - some transactions are taking a "long time" > (any more than, say, 200 milliseconds is a long time) > > - you have a very high transaction volume. > > That said, these messages are informational rather than signifying an > error condition. Some transaction blockage is expected since the ZEO > server can only deal with one transaction at a time. > > What version of Zope are you using? > > Is this an "intranet" application? Are there lots of users creating > content? Can you venture a guess as to how many users are "creating" > content vs. "viewing" content at any given time? Are the users that are > creating content logged in? The users that are viewing content? > > On Wed, 2005-08-31 at 11:03 -0500, Kennamore, Matthew G [NTK] wrote: > > Here is our situation, we originally launched zope with a small user > > base in mind and like most IT implementations it got away from us > > quickly and we have over 1000 users now. We are experiencing huge > > slowdowns and lots of complaints of performance. > > > > Let me outline our system: > > > > I have a load balancer that round robins incoming request to 3 zeo > > servers > > > > I have 1 zope server on the back en that severs the data, this is a > > large single processor machine with 4 gigs of ram > > > > Each zeo server is 2 gigs of ram, single processor 3.2 gighz > > > > The throughput doesn't appear to be the problem as ram/processors are. > > > > Short term I plan to change all zeo's to 4 gigs ram and add 3 > > additional servers. > > > > > > The Technologies we are using are Zope, Zeo, plone and so forth. Why > > are we having these large issues? I see sites with hundreds of > > thousands of users and they don't seem to have these issues? We plan > > to recode our site to get away from the Data.fs as soon as we can but > > that is a ways off yet. What am I doing wrong can anyone help? > > > > _______________________________________________ > > Zope maillist - Zope(a)zope.org > > http://mail.zope.org/mailman/listinfo/zope > > ** No cross posts or HTML encoding! ** > > (Related lists - > > http://mail.zope.org/mailman/listinfo/zope-announce > > http://mail.zope.org/mailman/listinfo/zope-dev ) > >

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Defining and creating a temporary storage for each user
by Marco Bizzarri 06 Sep '05

06 Sep '05

Hi all. My work environment is Zope 2.7.x I would like to create a different temporary storage for each user. Of course, I can't simply write them in the zope.conf. Users should have their own storage, so that they can create/modify objects inside that, without influencing the general, shared database. Is this configuration possible? I've seen I could manipulate entries in the dbtab object, but I'm not sure this is safe after the first startup. Regards Marco

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Multilingual content class with LocalPropertyManager
by Dragos Chirila 06 Sep '05

06 Sep '05

Hi I want to build a multilingual content class with LocalPropertyManager from the Localizer product. Also, my class extends the File class, something like: class MClass(LocalPropertyManager, File): title = LocalProperty('title') description = LocalProperty('description') def __init__(self, id, title, description, file, precondition, content_type, lang): File.__dict__['__init__'](self, id, title, file, content_type, precondition) self._setLocalPropValue('title', lang, title) self._setLocalPropValue('description', lang, description) The problem is that everytime I call the title property it doesn't return the LocalProperty 'title', but instead it returns the value entered when the object was created. From a ZPT, if lang is the current selected language and is 'en': <span tal:replace="here/title" /> - don't get the correct value for the selected language <span tal:replace="python:here.getLocalProperty('title', lang)" /> - correct value Not event after editing the object properties, the 'title' value remains the same: the value entered when the object was created. I tried not to call the File constructor, but it doesn't work also. My LocalProperty 'title' is somehow 'hidden'. Could you please give me some indications about what am I doing wrong? Is there another way to have a class like MClass? Thanks a lot, Dragos

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Truncating strings with DTML
by Aaron Gillette 06 Sep '05

06 Sep '05

Hi All, I'd like to take a string like: /Computers/Data_Formats/Almost_Every_File_Format_in_the_World and cut it down to: /Computers/Data_Formats using DTML. I've tried to count to the last "/", and then truncate the string with ljust, like so: <dtml-let strDirPathSize="_.string.rfind(strDirPath, '/')"> <dtml-let strDirPath="_.string.ljust(strDirPath, strDirPathSize)"> However, ljust/rjust won't truncate the string. In the case above, I know that I want to truncate the string to 23 characters (/Computers/Data_Formats). Is there a way to accomplish this in DTML? If not, any suggestions? Thanks in advance, Aaron

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Re: [Zope] Re: (1 conflicts since startup at 2005-08-04T14:45:39)
by Chris Withers 06 Sep '05

06 Sep '05

No, but I have in the past. You don't have CMF Member installed by any chance do you? cheers, Chris Tom Hallam wrote: > So on a development site with one person accessing it occasionally you > wouldn't expect to see any?! > > Tom > > Chris Withers wrote: > >> It's when Zope's optimistic concurrency model encounters a conflict >> but where it managed to resolve it by retrying the request. >> >> So, this is only a problem if you see LOTS of them, as it'll mean >> you're taking a big performance hit and you should think about what's >> causing the conflicts... >> >> A google for "Conflict Error Zope" will give you LOTS of information ;-) >> >> cheers, >> >> Chris >> >> Tom Hallam wrote: >> >>> I get it to. Any ideas what it is? >>> >>> Tom >>> >>> Garito wrote: >>> >>>> Hi all! >>>> We have: >>>> >>>> Zope Version >>>> (Zope 2.7.4-0, python 2.3.4, linux2) >>>> Python Version >>>> 2.3.4 (#1, May 19 2005, 17:40:30) [GCC 3.3.5-20050130 (Gentoo >>>> 3.3.5.20050130-r1, ssp-3.3.5.20050130-1, pie-8.7.7. >>>> System Platform >>>> linux2 >>>> >>>> >>>> and >>>> Archetypes 1.3.2-final >>>> CMF 1.4.7 >>>> Epoz 0.9.0 >>>> >>>> Our problem is we create some archetypes and in some parts of our >>>> structure if we try to create some object the computer cpu grows to >>>> 100% and raises >>>> >>>> 2005-08-04T15:01:02 INFO(0) ZODB conflict error at >>>> /VirtualHostBase/<<the url to the object>>/createObject (1 conflicts >>>> since startup at 2005-08-04T14:45:39) >>>> >>>> Has someone any idea to solve these issue? >>>> >>>> On development time nothing of these occurs and when we go to >>>> production time these problem begins (for that these question is, >>>> for us, urgent) >>>> >>>> Thank you very much >>>> >>> >>> _______________________________________________ >>> Zope maillist - Zope(a)zope.org >>> http://mail.zope.org/mailman/listinfo/zope >>> ** No cross posts or HTML encoding! ** >>> (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce >>> http://mail.zope.org/mailman/listinfo/zope-dev ) >>> >> -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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writing permissions broken
by Michael Lindner 05 Sep '05

05 Sep '05

Hi, for some reason I can no longer use any scripts to create zope objects, including the example scripts. Whenever I try to create new objects, incluging using the guest-book or file-library examples zope asks me to login again, and does not accept any logins, including admin. It was all working fine before! Please tell me what went wrong here! Mike.

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Stepper1.1.0 Released!
by Chris Withers 05 Sep '05

05 Sep '05

Stepper is a framework for performing asynchronous tasks on Zope servers. This is a new release fixing some minor bugs and introducing some new features. The major changes for this release were: - a new 'finalise' hook has been added to steps - an option has been added such that processing of a sequence can continue even if an error occurs during the processing of a particular object For more information, please see: http://www.simplistix.co.uk/software/zope/stepper cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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RE: [Zope] Zope startup error: Archetypes: IndexError: list index out of range
by Paul Sue 05 Sep '05

05 Sep '05

OK ... But surely, there must be some way to get Zope/Plone working on Solaris! I think we have Windows Server 2003 box I can try :) -----Original Message----- From: Chris Withers [mailto:chris@simplistix.co.uk] Sent: Friday, September 02, 2005 12:17 AM To: Paul Sue Cc: zope(a)zope.org Subject: Re: [Zope] Zope startup error: Archetypes: IndexError: list index out of range Paul Sue wrote: > Hi, > > OK, I rebuilt Zope because I think last time, I didn't have a clean directory. Simple advise: don't use Solaris unless you really really have to. Especially not for an app server, but even running a storage server will cause you unnecessary pain... Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk

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