Re: [ZODB-Dev] indexing and querying objects in the ZODB
Hi, On Friday, Feb 13, at 9:30am +0100, Jim Fulton wrote: Have you done any scale experiments? Indeed, I've done tests with some binary trees with a heigth from 2 till 20. The results pointed out, that filling the index structures required very much more time than the query itself (which was expected, of course :) ). For a tree with a height of e.g. 14 (round about 32000 objects) it took 20 seconds to fill the ZODB (including indexstructures in gocept.objectquery) and less than 2 seconds for some testing queries. Of course, the times raise exponentially with the height of the tree. However, the main development focus until now was in stability and not in performance. Probably, performance can be increased with simple code refactorings. Basti -- Sebastian Wehrmann · s...@gocept.com gocept gmbh co. kg · forsterstraße 29 · 06112 halle (saale) · germany http://gocept.com · tel +49 345 1229889 12 · fax +49 345 1229889 1 Zope and Plone consulting and development smime.p7s Description: S/MIME cryptographic signature PGP.sig Description: This is a digitally signed message part ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
[ZODB-Dev] indexing and querying objects in the ZODB
Hi, I finished my diploma thesis about indexing and querying objects [1] (only available in german - sorry) last year. With that thesis I developed some piece of software, which can be used to query for objects within the ZODB with a XPath like syntax (its called regular path expressions). I released a very pre-alpha version some days ago at pypi [2]. If you are interested, feel free to play with it and report me your experiences. Please also report bugs to [3]. If you have questions, please send me an Email. Kind regards, Sebastian [1] http://archiv.tu-chemnitz.de/pub/2008/0081/data/diplomarbeit.pdf [2] http://pypi.python.org/pypi/gocept.objectquery/ [3] https://bugs.launchpad.net/gocept.objectquery -- Sebastian Wehrmann · s...@gocept.com gocept gmbh co. kg · forsterstraße 29 · 06112 halle (saale) · germany http://gocept.com · tel +49 345 1229889 12 · fax +49 345 1229889 1 Zope and Plone consulting and development smime.p7s Description: S/MIME cryptographic signature PGP.sig Description: This is a digitally signed message part ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
[ZODB-Dev] diploma thesis: ZODB Indexing
Hi, my name is Sebastian Wehrmann and I'll write my diploma thesis about ad hoc querys and indexing with ZODB within the next months at gocept. I study Applied Computer Science at University of Technology Chemnitz with specialisation in Media Computing. I will inform you in period about the work done and the plans, because the final work will become open source and should be further developed by the community. Regards, -- Sebastian Wehrmann gocept gmbh co. kg · forsterstrasse 29 · 06112 halle/saale www.gocept.com · fon. +49 345 122988912 · fax. +49 345 12298891 ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
