Re: sorted search

[Daniel Naber]

On Thursday 24 February 2005 19:01, Yura Smolsky wrote:

       sort.setSort( new SortField[] { new SortField (modified,
 SortField.STRING, true) } );

You should store the date as a number, e.g. days since 1970 (or weeks if 
that is precise enough) and then tell the sort that it's an integer. 
DateField always stores the date in milliseconds which leads to a large 
number of terms, it also turns the date into a string, both makes searching 
and especially sorting slower.

Regards
 Daniel

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Re: sorted search

[Erik Hatcher]

Sorting by String uses up lots more RAM than a numeric sort.  If you 
use a numeric (yet lexicographically orderable) date format (e.g. 
MMDD) you'll see better performance most likely.

Erik
On Feb 24, 2005, at 1:01 PM, Yura Smolsky wrote:
Hello, lucene-user.
I have index with many documents, more than 40 Mil.
Each document has DateField (It is time stamp of document)
I need the most recent results only. I use single instance of 
IndexSearcher.
When I perform sorted search on this index:
  Sort sort = new Sort();
  sort.setSort( new SortField[] { new SortField (modified, 
SortField.STRING, true) } );
  Hits hits =
searcher.search(QueryParser.parse(good, content,
  StandardAnalyzer()), sort);

then search speed is not good.
Today I have tried search without sort by modified, but with sort by
Relevance. Speed was much better!
I think that Sort by DateField is very slow. Maybe I do something
wrong about this kind of sorted search? Can you give me advices about
this?
Thanks.
Yura Smolsky.

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