Hello Martijn, I think that would give a great GSOC project. The subject is well contained, knownledge might be ported from RDB and/or AdvancedQuery.
Thursday, March 15, 2007, 7:04:03 PM, you wrote: MF> Hello, MF> Adam Groszer wrote: >> I'd like to ask your opinion, your experiences about searching and >> filtering in quite large object DBs. >> We need to add search and filter functions to our current app, where >> the user might be able to create quite _sophisticated_ filter criterias. >> (The app is a pure Z3 app, subject is document management) >> >> Currently we're looking at something based on catalog/indexes. >> As I checked the most comfortable solution would be based on >> hurry.query. >> Some questions arose: >> - Is it necessary/worth adding indexes on all attributes? >> - How does the index perform on modification and retrieval? >> >> The biggest problem is that this will be our first try, so we're >> missing experiences and are a bit puzzled about the right solution. >> Certain is that moving to RDB is not an option. MF> I think one of the main limitations of the current catalog (and MF> hurry.query) is efficient support for sorting and batching the query MF> results. The Zope 3 catalog returns all matching results, which can then MF> be sorted and batched. This will stop being scalable for large MF> collections. A relational database is able to do this internally, and is MF> potentially able to use optimizations there. MF> It would be very nice if someone could look into expanding hurry.query MF> and/or the catalog to support these cases. It would be interesting to MF> look at what Dieter Maurer has done with AdvancedQuery in Zope 2 in this MF> regard as well. MF> Regards, MF> Martijn MF> _______________________________________________ MF> Zope3-dev mailing list MF> Zope3email@example.com MF> Unsub: MF> http://mail.zope.org/mailman/options/zope3-dev/agroszer%40gmail.com -- Best regards, Groszer Adam -- Quote of the day: Evil is only good perverted. - Henry Wadsworth Longfellow _______________________________________________ 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