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Difference between manage_changeProperties and manage_editProperties?
by Peter Arvidsson 11 Aug '00

11 Aug '00

What is the difference? Somewhere I read that one of them erased all properties and changed those that are sent to the method (causing properties that is not sent to the method to be empty) but I dont remeber where I read it or which one it was? Are there any other differences?

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PB with zodbca object, very Important !!!!!!!!!!!!!!!!
by kguesnet＠imexpert.com 11 Aug '00

11 Aug '00

When I create or use an object with a zodbc connection, and when I try to see a dtml page using it, zope open a login window (login with password) , but I don't know what it is, because I try lot of password (zope manager password, zope simple user password, Pc user password ....) no one can give me the access to the view of the dtml page. has anyone this sort of problem, and does anyone have a solution ???? thks a lot for your answer .... david sergent

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RE: [Zope] Defining High Load in Heavily DB Driven site (was: [Z ope] zope2.2.0 and what is high load)
by Chris McDonough 11 Aug '00

11 Aug '00

Here's my understanding of how it works: - The number of threads is decided by NUMBER_OF_THREADS in z2.py or the command line argument -t[whatever]. - You can give ZServer/Zope a hundred threads if you want to, but if you want more DB connections to service those threads with, you need to change the pool_size in DB.py. Because Dario's site is hypothetical at the moment, it's probably not a good idea to start out by changing these parameters. He should probably just try it out at default, knowing that he can (carefully) bump these values up as necessary if he notices problems. It's sort of pointless to guess about how to increase speed until you know you need it to be increased. Zope can handle this kind of load, it's just a matter of hitting the sweet spot. In order to do that, you need to do some profiling work, unfortunately. > -----Original Message----- > From: Paul Everitt [mailto:paul@digicool.com] > Sent: Friday, August 11, 2000 9:03 AM > To: Dario Lopez-Kästen > Cc: zope(a)zope.org > Subject: Re: [Zope] Defining High Load in Heavily DB Driven site (was: > [Zope] zope2.2.0 and what is high load) > > > "Dario Lopez-Kästen" wrote: > > > > Hello! > > Hello Dario! > > > I need to find more info on how Zope handles threading with > relation to > > database connections. > > How about: > > http://www.zope.org/Documentation/Developer/Models/ZODB > > The jargon of threads and connections (and then threads again) can be > pretty confusing in Zope. > > First, ZServer is the thing in front listening for socket > requests. It > has a connection pool (select based) which maps into Python threads in > the Zope application. (ZServer is part of the Zope process, I'm > discussing logical partitioning.) > > Each concept of a "thread" in Zope is actually a "database connection" > to the ZODB. Threads get a private copy of the transaction > space, thus > greatly simplifying (to the point of removal) the need for programmers > to think about thread safety. > > If you're talking about the thread concurrency a connection to Oracle, > then that's a bit different. I _think_ that ultimately this > maps to the > number of Zope database connections. > > This conversation is probably better in the zope-dev list. > > > I am currently considering and evaluating Zope as one of > the options we have > > to build a really large, completely databasedriven > "enterprise scale" > > web-platform. I am a bit worried about this "maximum of 7 > threads per db > > This isn't a maximum. It's just the default. It's easy to > increase the > number of connections. > > > connection" limitation mentioned previously, and I need to > know a) what does > > this mean in terms of accesibility, b) how does it affect > performace, and c) > > how does Zope work (in detail) with external database connections. > > > > We are going to be using Oracle as our DB backend, all our > served data will > > be database *only* (some of it will be fairly large), and > efficient database > > connections is *crucial* to what we intend to do. > > Since you're not using any persistent objects in Zope (unless you do > caching of the SQL data, which you probably should), then you > don't have > to worry about process growth from having more database > connections for > Zope. Jack it up to 25. > > Since much of the time in a Zope hit is taken by rendering to HTML, a > number like 25 probably means you can process a hundred simultaneous > Oracle requests. That works out to be an average of around > ten million > hits per day. If you want more, increase the number. > > > We are going to have between 10-20k users at most and I > expect the maximun > > of simultaneous connections to be beween 400 - 900 under > heavy load; "normal > > load" will probably oscillate around 25-200 simultaneous > connections (these > > numbers are crude guesses, but take into account increased > usage over time > > as more services are provided in the future). > > > > Bandwith problems are not an issue, nor is computing power. > > > > I would appreciate any pointers to documentation or people to ask. > > Is this an intranet or a public site? > > --Paul > > _______________________________________________ > 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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RE: [Zope] No file in INPUT TYPE='file' field
by Mabe, Brad 11 Aug '00

11 Aug '00

I love this list! I am designing a file upload form and just started thinking about how I am going to handle invalid filenames, no filename, etc. Of course, rather than doing "real work" I decided to take some time and catch up with my e-mail and viola! Here is this thread. Thanks Peter! -=Brad=- -----Original Message----- From: Peter Arvidsson [mailto:peter@innodev.com] Sent: Thursday, August 10, 2000 4:07 AM To: Alexander Chelnokov Cc: zope Subject: Re: [Zope] No file in INPUT TYPE='file' field Hi I use this code to check if the input is empty: <dtml-if "name_of_file_input.filename"> Exists... To check if the input is a valid file you can store it as a temporary variable and then make a check if the size of the object is more than 0 bytes like this: <dtml-if "_.getitem(temp_object_id,0).getSize() > 0"> Valid file... I hope this helps you :) Peter Alexander Chelnokov skrev: > > Hello All, > > How to define in DTML that user put nothing into the > field <INPUT TYPE="file"...>? > Give pls an example of code. > > Best regards, > Alexander N. Chelnokov > Ural Scientific Institute of Traumatology and Orthopaedics > str.Bankovsky, 7. Ekaterinburg 620014 Russia > ICQ: 25640913 > > _______________________________________________ > 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 ) _______________________________________________ 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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RE: [Zope] zope2.2.0 and what is high load
by Chris McDonough 11 Aug '00

11 Aug '00

> i went to each Zeo client control_panel, and see that there's > a mzximum of > four connections open at any given time. OK, I'm not sure this is real meaningful. A lot can happen in between refreshes. This is only a rough sort of "realtime" guess of what's going on. > why wouldn't increasing the number of threads with -t25 > affect the way zope > behave? do i need to change it in z2.py? No... -t[whatever] does the same thing as NUMBER_OF_THREADS in z2.py. > > There is also a profiling facility inside > Control_Panel/debug that does > > some sort of automated performance compilation for you, though I've > > never had a reason to use it. When it's running, it also > purportedly > > slows Zope down quite a bit. > > > > profiling is not enabled since i dont really know the heck it does. I don't know what it does specifically, either. I've never needed to use it. Maybe somebody else can comment. > > I suggest that you: > > > > 1) Monitor your Zope clients' thread usages by using their debug > > facilities. > done. as mentioned above, the number of connections is four > at most. what > else should i look for in the debugInfo? That's about it for your problem. Maybe the profiling stuff can give more info, I'm not sure. > most of the z2 threads are used, although only 3-4 are used > heavily. what > does this show? It shows that four threads have database connections. I'm curious as to why you're only seeing four threads being served by database connections too. You may want to ramp your number of threads down to 5 (-t5). 25 doesn't do much for you because only 7 threads can be using database connections at any given time. The high number of threads you're servicing might actually be slowing things down as they contend for available database connections. Why are you frontending this with apache? how are you servicing two ZEO clients via a single apache? Does it do some sort of round-robining? Or does each box have its own apache? Is there any reason you're not just using straight ZServer? I'm wondering if apache processes contending to talk to available Zope python threads might be slowing stuff down? It doesn't seem as if bumping your number of database connections will do us any good here, because it doesn't seem you're using all 7. I'm not sure *why* you're not using all 7, because you've got at least 15 processes waiting around just on your top screen for DB connections. Maybe manage_debug isn't telling you the whole story, or maybe you caught it at a low-load period. I wonder if the profiling stuff would help here. Maybe someone else can jump in here, this is all I can think of at the moment.

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Re: [Zope] ZClass inheriting from image question
by Meeting Maker Webmaster 11 Aug '00

11 Aug '00

Hello, At 18:36 10.08.2000 +0000, Kapil Thangavelu wrote: >make a dtml doc id:return_image >with body ><dtml-var data> > >and use that as your source >so in index_html > ><img src="<dtml-var "return_image.absolute_url()">"> Works great. Thank you very much for your help. Best regards, Gérard Métrailler Jr. Meeting Maker Inc. ... the intelligent choice for collaborative scheduling Email: webmaster(a)meetingmaker.com Web: http://www.meetingmaker.com

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Login and password
by Tom Deprez 11 Aug '00

11 Aug '00

Hi, I'm wondering is it possible to implement a way that Zope asks for a password, but not for a login? eg. like you would give several people the same login & password, but that the users don't have to enter the login, only the password? Thanks, Tom.

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Batch Processing, final
by Tom Deprez 11 Aug '00

11 Aug '00

Pfew, I managed to implement the thing I wanted. However I'm not satisfied. There must be an easier solution. If somebody knows which, then please let me know! Thanks. Here is the code I use to display something like in a search result : Previous 1 2 3 4 5 6 Next <dtml-in address_lookup size=5 start=query_start> <dtml-if sequence-start> <p>Search Result : <dtml-var count-CENTRE_NO> matches<p> <table width="100%"> <tr> <td align="left" width="60">  <dtml-if previous-sequence> <a href="<dtml-var URL><dtml-var sequence-query>query_start=<dtml-var previous-sequence-start-number>"> <dtml-var "gif_previous.tag(border='0')"></a> </dtml-if> </td> <td align="center">  <dtml-in address_lookup previous size=5 start=query_start> <dtml-in previous-batches mapping> <a href="<dtml-var document_id><dtml-var sequence-query>query_start=<dtml-var batch-start-number>"> <dtml-var "(_.getitem('batch-start-index',0)/_.getitem('batch-size',0))+1"></a> </dtml-in> </dtml-in>  <dtml-var "(_.getitem('sequence-index',0)/_.getitem('sequence-step-size',0))+1"></a>  <dtml-in address_lookup next size=5 start=query_start> <dtml-in next-batches mapping> <a href="<dtml-var document_id><dtml-var sequence-query>query_start=<dtml-var batch-start-number>"> <dtml-var "(_.getitem('batch-start-index',0)/_.getitem('batch-size',0))+1"></a> </dtml-in> </dtml-in> </td> <td align="right" width="60">  <dtml-if "((_.getitem('sequence-index',0)+_.getitem('sequence-step-size',0))+1) < (_.getitem('count-CENTRE_NO',0))"> <a href="<dtml-var URL><dtml-var sequence-query>query_start=<dtml-var "(_.getitem('sequence-index',0)+_.getitem('sequence-step-size',0))+1">"> <dtml-var "gif_next.tag(border='0')"></a> </dtml-if> </td> </tr> </table> </dtml-if sequence-start> .... show present page results ... </dtml-in> Regards, Tom.

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Hungry Zopitista Looking for a Revoloution
by Kapil Thangavelu 11 Aug '00

11 Aug '00

Hi, I am a Python/Zope Developer looking for work. Telecommuting or something in the area of Pasadena, CA. contract, part-time, fulltime. I tried the Zope job board but response was virtually nonexistent. My resume is up on my homepage http://sindev.dyndns.org/Home viva la revolution. Kapil Thangavelu

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Batch processing
by Tom Deprez 11 Aug '00

11 Aug '00

Hi, few q'ns concerning batch processing: 1. I want the user to be able to choose a batch-page. So, when a query is done, I want to show something like : previous page 1 - 2 - 3 - 4 - 5 next page. The following code works partly: ie. the one thing missing is that it doesn't shows the current page. How can I implement this? <dtml-in address_lookup previous size=5 start=query_start> <dtml-in previous-batches mapping> <dtml-unless sequence-start>  </dtml-unless> <a href="<dtml-var document_id><dtml-var sequence-query>query_start=<dtml-var batch-start-number>"> <dtml-var "(_.getitem('batch-start-index',0)/_.getitem('batch-size',0))+1"></a> </dtml-in> </dtml-in> <dtml-in address_lookup next size=5 start=query_start> <dtml-in next-batches mapping> <dtml-unless sequence-start>  </dtml-unless> <a href="<dtml-var document_id><dtml-var sequence-query>query_start=<dtml-var batch-start-number>"> <dtml-var "(_.getitem('batch-start-index',0)/_.getitem('batch-size',0))+1"></a> </dtml-in> </dtml-in> <dtml-in address_lookup size=5 start=query_start> ... </dtml-in> 2. Is there an easier way to get what I want? 3. Does the above code means that it has to iterate 3 times over the list? Isn't there a way so that it needs only one pass over the list? Thanks in advance, Tom Deprez.

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