Sean, I was thinking about something like what you describe:
I index the articles in realtime basically, so the dates are pretty much
"right now". But can I compare the dates to a start date such as
2000-01-01 and set the boost to the diffenrence between the dates? This
will make the boost number higher as time goes but will that be a problem?
Another solution would be to re-index all the documents and calculate
new date boost each time.. but i guess that will be a big thing.
Moray: Will the range queries affect the performance?
Lets say that I want to boost all articles that are one week old with 5
and all that are one month old with 2 and leave all the rest.
Thanks for your input!
//Rob
Sean Carpenter wrote:
Rob,
We use the opposite approach and use a lower boost value during
indexing for older documents (which makes newer ones score higher).
When adding the document to the index, you can call Document.SetBoost
(http://lucene.apache.org/java/2_3_1/api/core/org/apache/lucene/document/Document.html#setBoost(float))
to set the overall document's boost factor. We use a pre-defined
scale based on the age of the document something like: less than 3
months = boost 1, 3 - 6 months = boost 0.8, 6 - 12 months = boost 0.4,
etc.
Sean
On Tue, Jul 21, 2009 at 10:50 AM, Robert Pohl<[email protected]> wrote:
Hi,
I have a lot of articles indexed with title, body and date.
How can I boost the dates so that the most recent articles have higher score
than the older ones?
Thanks,
Rob
