lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alessandro Benedetti (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-10448) [LTR] Feature vector caching separation
Date Fri, 07 Apr 2017 15:16:41 GMT
Alessandro Benedetti created SOLR-10448:
-------------------------------------------

             Summary: [LTR] Feature vector caching separation
                 Key: SOLR-10448
                 URL: https://issues.apache.org/jira/browse/SOLR-10448
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Alessandro Benedetti
            Priority: Minor


We have different type of features, and their nature is different :
SolrFeature -> can be query dependent / query independent
FieldValueFeature -> query independent
Value Feature -> query level
OriginalScoreFeature - > query dependent

Intuition
Let's see when the extracted value for a feature change :

Query independent ( document level features) -> indexing time, every commit may change
the feature value and possibly invaldiate the cache entry

query dependent -> both request parameters and index can change the feature value

query level -> only request parameters can change the value, it is not affected by the
index

Caching
let's see the benefits of having 3 separate caches ( so the feature vector components will
be separated) :

Query independent feature Cache -> simply changing the request parameters will not invalidate
the cache entry, only a commit will cause the autowarming

Query Dependent Feature Cache -> this will behave like the current cache, so changing params
you will cache a different feature vector

Query level Cache ->the index is not involved at all

I have not yet investigated how caching internally works in the LTR plugin so i don't know
how much effort would imply.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message