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RE: [Zope] Re: WHY ? -- Performace in serving large media filesfrom ZODB vs from external file system
by Sedat Yilmazer 12 Jul '01

12 Jul '01

Hi Zopers In most of the systems ( specially where we have a server and performanace requirements) we have high end systems with fast disk access. In such system the problem most of the time is the CPU power/RAM/Internet Connection Speeds. If you have a system with a 2-8Mbps your basic bottleneck is at the CPU and RAM side, NOT at the Disc IO side. Lets assume that the total response time is setting up the client/server connection + (How is it in ZServer forks? ) request processing + finding the object in ZODB + Reading the object from ZODB + writing the data to temp file + pushing the file to client In this picture writting the file once more to the file system should not be a big part of the picture. In most systems IO is initiated by the CPU and completed by the hardware (DMA). If your channel to HD can not cope with that you must have the fastest Internet connection on the plannet. So as the last point. I would never ever giveup a consistent implementation if the performance inrease is less then %100. HW is so cheap that spending some days to get thing working may cost you alot more. Sedat -----Original Message----- From: zope-admin(a)zope.org [mailto:zope-admin@zope.org]On Behalf Of Dieter Maurer Sent: Saturday, July 07, 2001 11:32 AM To: marc lindahl Cc: zope(a)zope.org Subject: Re: [Zope] Re: WHY ? -- Performace in serving large media filesfrom ZODB vs from external file system marc lindahl writes: > > From: Dieter Maurer <dieter(a)handshake.de> > > I have to admit that I did not make any measurements. > > This is what we need, some real world numbers. Go ahead! > ... > I wonder why this temp file is used.... but just because a file is used > doesn't make it twice as slow. Either the whole system needs to be analyzed > or measured. Sure, but it may well do, if you have a really fast network or access it locally. The most efficient solution: read file in chunks and stream it onto the TCP connection. ZServer's solution: read the file in chunks, write to a temporary file. Read the temporary file in chunks and stream it onto the TCP connection. Additional overhead: Reading and writing the file once. Dieter _______________________________________________ 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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EventFolder 1.3 problem
by Georg Rellensmann 12 Jul '01

12 Jul '01

Hi, I installed EventFolder 1.3 on a ZOPE 2.3.3 site. When I try to post a new event a password-message pops up and I cannot add the event: (Object: EventDocument_add) Unauthorized: title I looked at the EventFolder FAQ, but all _add methods do have the manager proxy role. I tried to add an event as a manager from the managing screens as well as a "user" of the site. What is going wrong? All comments are highly appreciated! Regards, georg

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Problem When Integrating With IIS 4.0
by PRASANTH NAG KANNEGANTI 12 Jul '01

12 Jul '01

Dear Zope Support, We got a problem while accessing zope through IIS 4.0. We did all the settings. But zope is authentication failure window. Please help us in resolving the problem Best Reagards prasanthnag __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/

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Problem When Integrating With IIS 4.0
by PRASANTH NAG KANNEGANTI 12 Jul '01

12 Jul '01

Dear Zope Support, We got a problem while accessing zope through IIS 4.0. We did all the settings. But zope is authentication failure window. Please help us in resolving the problem Best Reagards prasanthnag __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/

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authentication problem
by Bob Shelton 12 Jul '01

12 Jul '01

i have a python product which inhertis from ObjectManager. i programmatically create instances of this product within itself as they are requested by the user. the problem is that i am getting an 'unauthorized' exception when i try to access index_html of the programmatically created objects. the really odd thing is that it only happens SOMETIMES. i get this: Site Error An error was encountered while publishing this resource. Unauthorized Sorry, a site error occurred. Traceback (innermost last): File /usr/local/src/Zope-2.3.3-src/lib/python/ZPublisher/Publish.py, line 223, in publish_module

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Newbie Q:<dtml-with> and the PARENTS tag
by List Subscriptions 12 Jul '01

12 Jul '01

Although I've searched all the How-Tos and Tips, I'm probably just missing something... I have a setup as follows: Root FolderA PropertyX FolderB PropertyX Method1 FolderC Method1 What I want to do is: for Method1, check the enclosing item for Property X. PropertyX could be either a property or a DTML Document (I realize these may be two separate cases). If PropertyX exists in/as a property of the Folderthat the Method is in, I want to execute some code; if it doesn't, then I don't want anything to happen. Here's what I started with: <dtml-with "PARENTS[0]" only> <dtml-if PropertyX> <dtml-var PropertyX> .....do some stuff... </dtml-if> </dtml-with> This doesn't work. Using the schema outlined above, both FolderB/Method1 and FolderC/Method1 return a PropertyX, but in the latter case it's the PropertyX from FolderA (of course....). So, does the 'only' option only restrict acquisition downward? Or what? This just doesn't jibe with how the docs describe the only option -- maybe there's something up with my Zope? Most importantly, how can I do what I need to do? I've tried plugging all kinds of expressions into the with tag, such as aq_explicit and aq_parent, but I'm not very familiar with Python and am probably doing it wrong. Really, I don't care how I solve this, so long as I do! I've tried about a ton of things and I can't get around Zope continuing to acquire upward irregardless of the 'only' modifier. When I tried it with <dtml-with PARENTS only> (no [0]), the if test fails in all cases. Yet in all of these cases, <dtml-var "PARENTS[0].id"> returns the id of the proper folder (FolderB, for example), so I know that PARENTS[0] is the place I want to look. Help!!!! (c.c. me via regular e-mail as well, if possible - I'm on the Digest version and would love to get answer as soon as someone gives me one!) Marc marc(a)mail.su.ualberta.ca

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Problem When Integrating With IIS 4.0
by PRASANTH NAG KANNEGANTI 12 Jul '01

12 Jul '01

Dear Support, We are using zope with windows NT/IIS 4.0. I did all changes according to your online help. But while accessing the zope through zope. I am getting authentication problems. Here I am pasting the error message. Please help us resolving the situation ============ERROR MESSAGE================= HTTP Error 401 401.5 Unauthorized: Authorization failed by ISAPI/CGI app This error indicates that the address on the Web server you attemped to use has an ISAPI or CGI program installed that verifies user credentials before proceeding. The authentication used to connect to the server was denied access by this program. Please make a note of the entire address you were trying to access and then contact the Web server's administrator to verify that you have permission to access the requested resource. ============ERROR MESSAGE================= best regards prasanthnag __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/

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Cookie Crumble
by Karl Munroe 12 Jul '01

12 Jul '01

Hi All Does anyone have a how-to for cookie crumbler

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Dtml-tree and manage_delObjects funny behavior
by Rogerio Atem de Carvalho 12 Jul '01

12 Jul '01

Dtml-tree and manage_delObjects funny behavior Hi, I use dtml-tree to show a hierarchy of folders containing exclusively instances of, say,MyZClass. The user can use the tree structure to add and update MyZclass instances, which properties are set by acquisition. A funny thing happens when I try do delete an instance: the folder containing the instance "looses" the id showed on the tree (its path become something like 127.0.0.1/Cities//) and the actual object that I would like to delete is not destroyed at all! The codes are: The tree: <dtml-var standard_html_header> <dtml-tree Cities branches=objectValues sort=id> <img src="<dtml-var SCRIPT_NAME>/<dtml-var icon>"> <dtml-if "meta_type=='Folder'"> <dtml-var id> <a href="<dtml-var tree-item-url>/frmAdd"><+></a> -->adds instances of MyZclass in the folder <dtml-else> <a href="<dtml-var tree-item-url>"><dtml-var title></a> <a href="<dtml-var tree-item-url>/frmDelete"><-></a> -->deletes the current MyZclass instance </dtml-if> </dtml-tree> <dtml-var standard_html_footer> The "destroy" method (metDestroy): <dtml-call "manage_delObjects(['id'])"> <dtml-var id> ------->shows the desired id (the Zclass instance id) that method is called by a another method which asks for confirmation from the user (frmDelete): <dtml-var standard_html_header> <FORM action="metDestroy"> Are you sure?<br> "<dtml-var summary>"<br> -->only shows the object summary property <input type=submit value=" Remove? "> </form> <dtml-var standard_html_footer> When that strange behavior started, I wrote some code to show the actual "id" being used in <dtml-call "manage_delObjects(['id'])">, and it was the MyZclass instance id, so there is no problem with ids (I think!). I used this method as both a MyZclass method and as a method in my main folder (Cities). The behavior was the same... I had to delete the folder where I tried to delete the instance so that the tree could "remember" the real folder structure (that was not affected!) The folder structure is Cities City1 Category1 MyZclass1 MyZclass2 MyZclass3 ... Category2 MyZclass4 MyZclass5 MyZclass6 ... Category3 ... City2 ... City3 ... ... One more thing: how can I refresh the tree after deleting or adding an object? I mean, how can I redirect from the Add/Delete forms to the tree form and refresh the tree? Thanks in advance, Rogerio

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CMF: extending MSWord Document product
by Dean Jones 11 Jul '01

11 Jul '01

Using Zope 2.3.1, I installed a product MSWordDocument from zope.org/Products--transparent conversion to HTML of any MSWord.doc. Once installed, I can add an instance of the product through the *local_host/manage* screen. Is there a way to extend this product that I can use it in my CMF portal? I have read the following How-To: Minimal Zope programming How-to *maxm Minimal Zope programming How-to - The Sequel *maxm PortalPoll *DaveW Taming The Wild Types Tool *Tres Seaver Scriptable Type Information *Tres Seaver But with no succesful results. Has anyone succesfully created a portal_type to use with this product? trace--- Traceback (innermost last): File /home/djones/Zope-2.3.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 223, in publish_module File /home/djones/Zope-2.3.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 187, in publish File /home/djones/Zope-2.3.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 171, in publish File /home/djones/Zope-2.3.1-linux2-x86/lib/python/ZPublisher/mapply.py, line 160, in mapply (Object: invokeFactory) File /home/djones/Zope-2.3.1-linux2-x86/lib/python/ZPublisher/Publish.py, line 112, in call_object (Object: invokeFactory) File /home/djones/Zope-2.3.1-linux2-x86/lib/python/Products/CMFCore/PortalFolder. py, line 368, in invokeFactory (Object: Traversable) File /home/djones/Zope-2.3.1-linux2-x86/lib/python/Products/CMFCore/TypesTool.py, line 714, in constructContent (Object: Traversable) File /home/djones/Zope-2.3.1-linux2-x86/lib/python/Products/CMFCore/TypesTool.py, line 471, in constructInstance (Object: ElementWithAttributes)

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