Hi Jack, On Sat, Dec 15, 2012 at 4:36 PM, Jack Krupansky <j...@basetechnology.com> wrote: > I have seen a few inquiries concerned with the overhead of storing time of > day for simple dates. The concerns are both storage and performance. So, the > question/proposal is whether a variant of TrieDate with no time of day > component, call it TrieDay or TrieDateTimeless or TrieDateNoTime (or > incompatibly rename TrieDate to TrieDateTime and use TrieDate for the new > format), could be stored with, say, 40% more storage efficiency and maybe a > comparable or at least significant performance improvement for queries.
Storing only the day in a 32-bits integer could save space, but I'm not sure Solr should provide a type for all granularities of dates? Have you tried to set your dates' hours, minutes, seconds and milliseconds to 0 before indexing them ? This should help postings lists share terms and improve storage efficiency (especially with the new Lucene41PostingsFormat). -- Adrien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
