org.apache.lucene.search.IndexOrDocValuesQuery might be also relevant.
On Mon, Aug 13, 2018 at 9:02 AM Zahra Aminolroaya
wrote:
> Thanks Erick, Shawn and Tomoko for complete answers.
>
> If I set both docvalue and indexed "true" in a field, will Solr understand
> to use which technique for
On 8/13/2018 12:02 AM, Zahra Aminolroaya wrote:
Thanks Erick, Shawn and Tomoko for complete answers.
If I set both docvalue and indexed "true" in a field, will Solr understand
to use which technique for faceting or searching? Or Is there any way to
inform Solr to use which technique?
Solr
"My expectation is that scanning Doc Values might be faster than inverted
index if a query matches more than %25 of documents."
I seriously doubt it. Or my expectations are really off base, which is
always possible, I confess I've never measured though. At a high
level:
indexed:
find entry for
https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/schema/FieldType.java#L881
https://github.com/apache/lucene-solr/blob/17eb8cd14d27d2680fe7c4b3871f3eb883542d34/solr/core/src/java/org/apache/solr/search/facet/FacetField.java#L106
On Mon, Aug 13, 2018 at 9:02
Thanks Erick, Shawn and Tomoko for complete answers.
If I set both docvalue and indexed "true" in a field, will Solr understand
to use which technique for faceting or searching? Or Is there any way to
inform Solr to use which technique?
--
Sent from:
My expectation is that scanning Doc Values might be faster than inverted
index if a query matches more than %25 of documents.
On Sun, Aug 12, 2018 at 7:59 PM Erick Erickson
wrote:
> bq. I have been informed that the performance of such a search is
> absolutely terrible.
>
> Yep. Horrible.
>
>
bq. I have been informed that the performance of such a search is
absolutely terrible.
Yep. Horrible.
These two structures answer completely different questions
indexed - "for this word, what docs contain it in field X?"
DocValues - "for this document, what is the value of field X?"
On my, my
On 8/12/2018 4:39 AM, Zahra Aminolroaya wrote:
Could we say that docvalue technique is better for sorting and faceting and
inverted index one is better for searching?
Yes. That is how things work.
If docValues do not exist, then an equivalent data structure must be
built in heap memory
> Could we say that docvalue technique is better for sorting and faceting
and inverted index one is better for searching?
The short answer is yes.
In addition, there are several special data structures for numeric/date
range/geo spatial search.
Could we say that docvalue technique is better for sorting and faceting and
inverted index one is better for searching?
Will I lose anything if I only use docvalue?
Does docvalue technique have better performance?
--
Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
10 matches
Mail list logo
