Hi Ken, It sounds like you want to just sort by "time changed/added" (reverse chrono order). I would not worry about issues just yet unless you have some reasons to think this is going to cause problems (e.g. giant index, low RAM). Jonathan is right about commits, and the NRT-ness of search in a typical Solr master-slave setup. In other words, even if you update the doc, it will be on the master, and your user will still see the same results in the same order until the next time the index is replicated from the master.
Otis ---- Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch Lucene ecosystem search :: http://search-lucene.com/ ----- Original Message ---- > From: kenf_nc <ken.fos...@realestate.com> > To: solr-user@lucene.apache.org > Sent: Wed, April 13, 2011 4:49:06 PM > Subject: Re: Result order when score is the same > > Is a new DocID generated everytime a doc with the same UniqueID is added to > the index? If so, then docID must be incremental and would look like > indexed_at ascending. What I see (and why it's a problem for me) is the > following. > > a search brings back the first 5 documents in a result set of say 60. The > score,titles are as follows (simulated) > 1) 6.5, Doc 1 > 2) 6.3, Doc 2 > 3) 4.7, Doc 3 > 4) 4.7, Doc 4 > 5) 4.7, Doc 5 > --- > 6) 4.7, Doc 6 > 7) 4.7, Doc 7 > 8) 4.4, Doc 8 > > If I query 6 times the results come back like that every time. However if I > change a field in Doc 4, a field that is not part of the search, it gets the > same score, but the results are now this. > 1) 6.5, Doc 1 > 2) 6.3, Doc 2 > 3) 4.7, Doc 3 > 4) 4.7, Doc 5 > 5) 4.7, Doc 6 > --- > 6) 4.7, Doc 7 > 7) 4.7, Doc 4 > 8) 4.4, Doc 8 > > So, in a specific situation I'm looking at, a user sees 5 items on a UI > page, they click a button to 'favorite' document #4, I update Doc 4 and > (because it was architecturally better) I re-issue the search. So from the > users viewpoint they 'favorited' number 4 and it disappeared from their > screen. Not a good user experience. > > If I could modify the secondary sort when score is the same then worse case > doc 4 would pop to the top of the users screen but not disappear. Better > would be to secondary sort on Title or some other fixed field that exists on > all documents. But, I would want the sort to be at the system level, I dont' > want the overhead of sorting every query I ever make. > > > > -- > View this message in context: >http://lucene.472066.n3.nabble.com/Result-order-when-score-is-the-same-tp2816127p2817766.html > > Sent from the Solr - User mailing list archive at Nabble.com. >
