Hi Mike, how many docs and groups do you have in your index? I think the group.sort option fits your requirements.
If I remember correctly group.ngroup=true adds something like 30% extra time on top of the search request with grouping, but that was on my local test dataset (~30M docs, ~8000 groups) and my machine. You might encounter different search times when setting group.ngroup=true. Martijn 2011/8/1 Mike Sokolov <soko...@ifactory.com> > Thanks, Tomas. Yes we are planning to keep a "current" flag in the most > current document. But there are cases where, for a given user, the most > current document is not that one, because they only have access to some > older documents. > > I took a look at > http://wiki.apache.org/solr/**FieldCollapsing<http://wiki.apache.org/solr/FieldCollapsing>and > it seems as if it will do what we need here. My one concern is that it > might not be efficient at computing group.ngroups for a very large number of > groups, which we would ideally want. Is that something I should be worried > about? > > -Mike > > > On 08/01/2011 10:08 AM, Tomás Fernández Löbbe wrote: > >> Hi Michael, I guess this could be solved using grouping as you said. >> Documents inside a group can be sorted on a field (in your case, the >> version >> field, see parameter group.sort), and you can show only the first one. It >> will be more complex to show facets (post grouping faceting is work in >> progress but still not committed to the trunk). >> >> I would be easier from the Solr side if you could do something at index >> time, like indicating which document is the "current" one and which one is >> an old one (you would need to update the old document whenever a new >> version >> is indexed). >> >> Regards, >> >> Tomás >> >> On Mon, Aug 1, 2011 at 10:47 AM, Mike Sokolov<soko...@ifactory.com> >> wrote: >> >> >> >>> A customer has an interesting problem: some documents will have multiple >>> versions. In search results, only the most recent version of a given >>> document should be shown. The trick is that each user has access to a >>> different set of document versions, and each user should see only the >>> most >>> recent version of a document that they have access to. >>> >>> Is this something that can reasonably be solved with grouping? In 3.x? I >>> haven't followed the grouping discussions closely: would someone point me >>> in >>> the right direction please? >>> >>> -- >>> Michael Sokolov >>> Engineering Director >>> www.ifactory.com >>> >>> >>> >>> >> >> > -- Met vriendelijke groet, Martijn van Groningen
