Global Scores in ElasticSearch

Hi,

I'm new to ElasticSearch and just started learning about it. I'm
wondering if the relevancy scores reflect the global score i.e. lets say if
we are using simple TF-IDF as our relevance measure, is the TF-IDF computed
across all the documents for the index (across all shards) or only for that
shard ?

Also, how does some of the search parameters like rows, sort by etc.. work
across shards.

Thanks.

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By default, TFIDF values are calculated per shard. You can change your
query to use distributed term frequencies across an index. For more
information, see the documentation on search types:

Cheers,

Ivan

On Mon, Sep 23, 2013 at 11:53 AM, Phani Chaitanya pvempaty.usc@gmail.comwrote:

Hi,

I'm new to Elasticsearch and just started learning about it. I'm
wondering if the relevancy scores reflect the global score i.e. lets say if
we are using simple TF-IDF as our relevance measure, is the TF-IDF computed
across all the documents for the index (across all shards) or only for that
shard ?

Also, how does some of the search parameters like rows, sort by etc.. work
across shards.

Thanks.

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Thanks for the pointers.

On Monday, September 23, 2013 11:23:00 PM UTC-7, Ivan Brusic wrote:

By default, TFIDF values are calculated per shard. You can change your
query to use distributed term frequencies across an index. For more
information, see the documentation on search types:
Elasticsearch Platform — Find real-time answers at scale | Elastic

Cheers,

Ivan

On Mon, Sep 23, 2013 at 11:53 AM, Phani Chaitanya <pvempa...@gmail.com<javascript:>

wrote:

Hi,

I'm new to Elasticsearch and just started learning about it. I'm
wondering if the relevancy scores reflect the global score i.e. lets say if
we are using simple TF-IDF as our relevance measure, is the TF-IDF computed
across all the documents for the index (across all shards) or only for that
shard ?

Also, how does some of the search parameters like rows, sort by etc..
work across shards.

Thanks.

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