November 1999 - Zope-Dev

What's the problerm?
by Victor.Zhai＠ogilvy.com 16 Nov '99

16 Nov '99

Hi, I have replace my old zope system to Zope-2.0.1,And then appear some problerm. A user have been set up in the Root directory "acl_users" and I want to ftp to ZServer with it.But when pass the Username and Password.It cannot list the root dirctory.(Permission denied). I give this Local Role the Manager's above Owner right. But It can work properly within the first ZOpe version. Can some one help me. Thanks a lot. Victor zhai "WorldSecure Server <ogilvy.com>" made the following annotations on 11/16/99 13:46:32 ------------------------------------------------------------------------------ Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message and kindly notify the sender by reply email. Please advise immediately if you or your employer does not consent to email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of the Ogilvy Group shall be understood as neither given nor endorsed by it. ==============================================================================

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Namespace funkiness
by Thomas Marsh 16 Nov '99

16 Nov '99

Hi Zope-dev, I have a dtml method, "A", that calls another dtml method, "B". Now, B has some <dtml-var blah> calls in it. B works fine on its own, but when A calls B, for some reason B cannot see blah (a property set in the root folder). I see this behaviour a lot. Can anyone explain it? --thomas -- Thomas Marsh Email: tmarsh(a)point-one.net Phone: (512) 381-6457

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Re: [Zope-dev] Namespace funkiness
by Anthony Baxter 16 Nov '99

16 Nov '99

>>> Thomas Marsh wrote > I have a dtml method, "A", that calls another dtml method, "B". Now, B > has some <dtml-var blah> calls in it. B works fine on its own, but when A > calls B, for some reason B cannot see blah (a property set in the root > folder). I see this behaviour a lot. Can anyone explain it? How does it call it - with <dtml-var B>? Or with <dtml-var "B()"> ? If the latter, you'll need to pass the request and namespace through to it. Something like <dtml-var "B(REQUEST,_)"> Anthony

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Deleting a role doesn't remove associated permissions
by Andrew Wilcox 16 Nov '99

16 Nov '99

Yikes! Delete a role, and the permissions grants to users who are in that role remain. But the role or the permissions are no longer displayed, so the fact that someone has permission for a resource is hidden!

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Possible to share zclass properties by subclassing?
by Andrew Wilcox 15 Nov '99

15 Nov '99

I have several ZClasses I'm creating, and they share a number of common properties. Oh, I said, why don't I make an abstract ZClass for the common properties, and subclass my other ZClasses from that? But, oh well, the superclass view doesn't show up in the subclass manage screen, and I don't see the superclass property sheet as an option to select in the subclass "Views" tab. Am I off base here? Is there a way to share common properties? How should I do this? Thanks! Andrew

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Re: [Zope] Cheap LINUX Zope host?
by Sam Gendler 15 Nov '99

15 Nov '99

The biggest issue with SCSI is not so much performance any longer, but reliability. IDE drives have been traditionally targeted at the consumer market, while SCSI drives are aimed at the professional/server market. If you look at the Mean Time Between Failures numbers for the two types, SCSI tends to have been designed for higher reliability. That said, however, I have only ever had 2 IDE drives go south on me, with 0 scsi over the course of about 10 years. Those numbers are close enough for me, usually. Drive throughput tends to not be a huge issue with webservers, since servers spend most of their time seeking from one small object to another, not streaming enormous files to a network socket. With seek times anywhere between 8-14ms, and average object size somewhere around 8-15KB, if every object requires only one seek and one read from the disk, you can still only get about 70 transactions/second (assuming the read is instantaneous, which it isn't), which is only about 1 MB/second throughput. Therefore, it is much better to use multiple, slower drives, and distribute objects across multiple machines. Unfortunately, the data in zope is all stored in a single file, so this cannot be done. RAID is not much of a win, either, since raid increases throughput, but does nothing to improve seek time (it might even make it worse). You will be MUCH better off with more memory for buffering objects, to prevent disk access at all, rather than a fast drive. On a zope-dev note, I have a variety of solutions that would allow zope to distribute objects across multiple physical hard drives, that should not be too difficult to implement, if anyone is interested. I don't have time to play with such concepts myself until next year. --sam tommy_b(a)my-deja.com wrote: > Oops, I'm going to use LINUX as the host OS. > > I've done a bit of research on using SCSI. IWill & Tekram put out SCSI3 cards under $70 (according to http://www.pricewatch.com) Anyone use these guys? However, I'm not sure a cheap/close-out SCSI drive will match the performance-to-value ratio to a new ATA-66. http://www.storagereview.com has lots of drive tests that leads me to this thought. If I was spending more than $1000 for a new system, I'd go SCSI for sure. I need to keep below $700, but SCSI is one of my first planned upgrades. Is SCSI worth me getting a old used system with 64MB of RAM & slapping a SCSI card into it, or should I go for a new (dual) Celeron with 128MB? > > Has anyone actually done performce tests with Zope & SQL to compare what component has the most impact for a _cheap_ system: CPU, memory, or HD throughput (ATA vs SCSI)? > > Thanks for Stephan, Jim, & Nitin for the replies! > -- > > On Sun, 14 Nov 1999 18:28:56 Nitin Borwankar wrote in "Re: [Zope] What to buy for cheap Zope host?": > >tommy_b(a)my-deja.com wrote: > >> I'm building a computer to train & test Zope. I hope to use PostgreSQL or MySQL for storing a good-sized database. Zope would be used for allowing users to enter data & for output of formated querries. > >> I wish to spend no more than $700 on this new computer I'm building (not including sound & video card + monitor). What should I spend the most money on, CPU, memory, HD, or a balance? > >> I'm leaning towards a PPGA Celeron 366 (possibly overclocked), buying a 128MB stick of P100 RAM, and the fastest ATA drive $120 can buy. Is this the right direction? Ram's rather expencive now, or else I'd get 256MB right away. > > > >In either case spending some money and getting a SCSI controller and drive gives a measurable contribution to performance. However this may take you into the next price point segment ~1000$. I have found there are good bargains on SCSI drives to be had on eBay and ONSALE auctions - go for new and 7200RPM or more. > > --== Sent via Deja.com http://www.deja.com/ ==-- > Share what you know. Learn what you don't. > > --------- End Forwarded Message --------- > > --== Sent via Deja.com http://www.deja.com/ ==-- > Share what you know. Learn what you don't. > > _______________________________________________ > 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-dev] Passing parameters to __str__
by Michel Pelletier 15 Nov '99

15 Nov '99

> -----Original Message----- > From: Itamar Shtull-Trauring [mailto:itamars@ibm.net] > Sent: Monday, November 15, 1999 11:42 AM > To: zope-dev(a)zope.org > Subject: [Zope-dev] Passing parameters to __str__ > > > I'm trying to have an object that returns different data > based on if it's > called from <dtml-var> or on its own, so I defined a __str__ function. > > I need to pass REQUEST to __str__, but apparently __str__ > doesn't get any > parameters passed when it gets called. How do I correct this? You can acquire REQUEST: def __str__(self): req = self.REQUEST before using the __str__ of your object, stuff what your looking for in REQUEST (it it's not allready in there). -Michel

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Passing parameters to __str__
by Itamar Shtull-Trauring 15 Nov '99

15 Nov '99

I'm trying to have an object that returns different data based on if it's called from <dtml-var> or on its own, so I defined a __str__ function. I need to pass REQUEST to __str__, but apparently __str__ doesn't get any parameters passed when it gets called. How do I correct this? -- Itamar - itamars(a)ibm.net ---------------------------o----------------------------------------------o Perl/Gimp Greeting Cards | Trust? Ha! The US dollar is backed by ICBMs! | http://www.sealingwax.com | --Anonymous Coward, Slashdot |

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ftp_serever problems
by Robin Becker 15 Nov '99

15 Nov '99

following advice from Sam Rushing I managed to check the active sockets list and it seems as though the current ftp server doesn't recover sockets for suddenly aborted clients. He posted a modified ftp_server.py, but I'm pretty sure it doesn't handle this problem. -- Robin Becker

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making an NT service
by Robin Becker 15 Nov '99

15 Nov '99

My colleague and I migrated a working system from win98 to winnt 4.0 sp5. I there an easy way to set up the installation as a service. I looked at ZService.py and it seems to need some co-operation from the installer. -- Robin Becker

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