Op vrijdag 24 september 2010 17:57:45 schreef mark harwood: > >>While not exactly equivalent, it reminds me of our earlier discussion > >>around > >>"layered segments" for dealing with field updates > > Right. Fast discovery of document relations is a foundation on which lots of > things like this can build. Relations can be given types to support a number > of > different use cases.
How about using this (bsd licenced) tree as a starting point: http://bplusdotnet.sourceforge.net/ It has various keys: ao. byte array, String and long. A fixed size byte array as key seems to be just fine: two bytes for a field number, four for the segment number and four for the in-segment document id. The separate segment number would allow to minimize the updates in the tree during merges. One could also use the normal doc id directly. The value could then be a similar to the key, but without the field number, and with an indication of the direction of the link. Or perhaps the direction of the link should be added to the key. A link would be present twice, once for each direction. Also both directions could have their own payloads. It could be put in its own file as a separate 'segment', or maybe each segment could allow for allocation of a part of this tree. I like this somehow, in case it is done right one might never need a relational database again. Well, almost... Regards, Paul Elschot > > > > ----- Original Message ---- > From: Grant Ingersoll <[email protected]> > To: [email protected] > Sent: Fri, 24 September, 2010 16:26:27 > Subject: Re: Document links > > While not exactly equivalent, it reminds me of our earlier discussion around > "layered segments" for dealing with field updates [1], [2], albeit this is a > bit > more generic since one could not only use the links for relating documents, > but > one could use "special" links underneath the covers in Lucene to > maintain/mark > which fields have been updated and then traverse to them. > > [1] > http://www.lucidimagination.com/search/document/c871ea4672dda844/aw_incremental_field_updates#7ef11a70cdc95384 > > [2] > http://www.lucidimagination.com/search/document/ee102692c8023548/incremental_field_updates#13ffdd50440cce6e > > > On Sep 24, 2010, at 10:36 AM, mark harwood wrote: > > > This slideshow has a first-cut on the Lucene file format extensions > > required to > > > > support fast linking between documents: > > > > http://www.slideshare.net/MarkHarwood/linking-lucene-documents > > > > > > Interested in any of your thoughts. > > > > Cheers, > > Mark > > > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > -------------------------- > Grant Ingersoll > http://lucenerevolution.org Apache Lucene/Solr Conference, Boston Oct 7-8 > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
