# Distributed Frequency Search **URL:** \ **Category:** Elasticsearch\ **Created:** [November 5, 2014, 1:44pm UTC](https://discuss.elastic.co/t/distributed-frequency-search/20580 "2014-11-05T13:44:14Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Sofiane\_Cherchalli](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sofiane_cherchalli/32/1129_2.png) [@Sofiane\_Cherchalli](https://discuss.elastic.co/u/Sofiane_Cherchalli)\ **Post date:** [November 5, 2014, 1:44pm UTC](https://discuss.elastic.co/t/distributed-frequency-search/20580/1 "2014-11-05T13:44:14Z")
According to [http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/relevance-is-broken.html](http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/relevance-is-broken.html), the relevance is broken until we have enough data distributed uniformly across shards. My question is: If I initially use the ?search\_type=dfs\_query\_then\_fetch parameter because I few data, will it affect the performance when the Production environment will have enough data sharded uniformly? Thanks. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/50856f05-4329-4001-a833-6c568fc5730f%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/50856f05-4329-4001-a833-6c568fc5730f%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Sofiane\_Cherchalli](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sofiane_cherchalli/32/1129_2.png) [@Sofiane\_Cherchalli](https://discuss.elastic.co/u/Sofiane_Cherchalli)\ **Post date:** [November 5, 2014, 1:55pm UTC](https://discuss.elastic.co/t/distributed-frequency-search/20580/2 "2014-11-05T13:55:50Z")
Answering myself: According to ES blog [http://www.elasticsearch.org/blog/understanding-query-then-fetch-vs-dfs-query-then-fetch/](http://www.elasticsearch.org/blog/understanding-query-then-fetch-vs-dfs-query-then-fetch/) there is performance hit. It would be nice to have a feature that triggers automatically DFS based on a kinda threshold... On Wednesday, November 5, 2014 2:44:14 PM UTC+1, Sofiane Cherchalli wrote: > According to > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/guide/current/relevance-is-broken.html), > the relevance is broken until we have enough data distributed uniformly > across shards. > > My question is: If I initially use the ?search\_type=dfs\_query\_then\_fetch > parameter because I few data, will it affect the performance when the > Production environment will have enough data sharded uniformly? > > Thanks. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/2d535fce-8df3-4e13-9259-b017a11ac634%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/2d535fce-8df3-4e13-9259-b017a11ac634%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\ **Post date:** [November 6, 2014, 3:34pm UTC](https://discuss.elastic.co/t/distributed-frequency-search/20580/3 "2014-11-06T15:34:53Z")
We did some performance testing and found that the performance hit from using DFS was minor. -- Ivan On Wed, Nov 5, 2014 at 8:55 AM, Sofiane Cherchalli [sofianito@gmail.com](mailto:sofianito@gmail.com) wrote: > Answering myself: > > According to ES blog > [http://www.elasticsearch.org/blog/understanding-query-then-fetch-vs-dfs-query-then-fetch/](http://www.elasticsearch.org/blog/understanding-query-then-fetch-vs-dfs-query-then-fetch/) > there is performance hit. It would be nice to have a feature that triggers > automatically DFS based on a kinda threshold... > > On Wednesday, November 5, 2014 2:44:14 PM UTC+1, Sofiane Cherchalli wrote: > > > According to [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/guide/) > > current/relevance-is-broken.html, the relevance is broken until we have > > enough data distributed uniformly across shards. > > > > My question is: If I initially use the ?search\_type=dfs\_query\_then\_fetch > > parameter because I few data, will it affect the performance when the > > Production environment will have enough data sharded uniformly? > > > > Thanks. > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/2d535fce-8df3-4e13-9259-b017a11ac634%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/2d535fce-8df3-4e13-9259-b017a11ac634%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/2d535fce-8df3-4e13-9259-b017a11ac634%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/2d535fce-8df3-4e13-9259-b017a11ac634%40googlegroups.com?utm_medium=email&utm_source=footer) > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQCLCajraVb2VkY%3DsTLofJhYp1OCSz2QtkA603JJfrHgHw%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQCLCajraVb2VkY%3DsTLofJhYp1OCSz2QtkA603JJfrHgHw%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 12:51am UTC](https://discuss.elastic.co/t/distributed-frequency-search/20580/4 "2017-07-06T00:51:45Z")