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From Mikhail Khludnev <m...@apache.org>
Subject Re: Solr relevancy score different on replicated nodes
Date Fri, 04 Jan 2019 17:06:29 GMT
Replicated segments might have different deleted documents by design.
Precise numbers can be achieved via exact stats. see
https://lucene.apache.org/solr/guide/6_6/distributed-requests.html#DistributedRequests-ConfiguringstatsCache_DistributedIDF_


On Fri, Jan 4, 2019 at 2:40 PM AshB <bishtashish77@gmail.com> wrote:

> Version Solr 7.4.0 zookeeper 3.4.11 Achitecture Two boxes
> Machine-1,Machine-2
> holding single instances of solr
>
> We are having a collection which was single shard and single replica i.e
> s=1
> and rf=1
>
> Few days back we tried to add replica to it.But the score for same query is
> coming different from different replicas.
>
>
> http://Machine-1:8983/solr/MyTestCollection/select?q=%22data%22+OR+(data)&rows=10&fl=score&defType=edismax&qf=search_field+content&wt=json
>
> "response":{"numFound":5836,"start":0,"maxScore":*4.418847*,"docs":[
>
> whereas on another machine(replica)
>
>
> http://Machine-2:8983/solr/MyTestCollection/select?q=%22data%22+OR+(data)&rows=10&fl=score&defType=edismax&qf=search_field+content&wt=json
>
> "response":{"numFound":5836,"start":0,"maxScore":*4.4952264*,"docs":[
>
> The maxScore is different.
>
> Relevancy gets affected due to sharding but replication was not expected as
> same documents get copied to other node. score explaination gives issue
> with
> docCount and docFreq uneven.
>
> idf, computed as log(1 + (docCount - docFreq + 0.5) / (docFreq + 0.5))
> from:
> 1.050635000 docCount :*10020.000000000* docFreq :*3504.0000000*
>
> idf, computed as log(1 + (docCount - docFreq + 0.5) / (docFreq + 0.5))
> from:
> 1.068795100
>
> docCount :*10291.000000000* docFreq :*3534.0000000*
>
> Is this expected?What could be wrong here?Please suggest
>
>
>
> --
> Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
>


-- 
Sincerely yours
Mikhail Khludnev

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