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From "Fabrizio Fortino (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (OAK-9311) oak-search-elastic: use low-level client for critical operations
Date Wed, 06 Jan 2021 16:01:00 GMT

     [ https://issues.apache.org/jira/browse/OAK-9311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Fabrizio Fortino reassigned OAK-9311:
-------------------------------------

    Assignee: Fabrizio Fortino

> oak-search-elastic: use low-level client for critical operations
> ----------------------------------------------------------------
>
>                 Key: OAK-9311
>                 URL: https://issues.apache.org/jira/browse/OAK-9311
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>            Reporter: Fabrizio Fortino
>            Assignee: Fabrizio Fortino
>            Priority: Major
>
> We are currently using the Java High-Level Rest Client [1] to interact with Elastic.
While this is quite handy to use it does not seem to be the best option in terms of performance
[2]. 
> Using the low-level client would mean to write more code in OAK with the advantage of
having better performances and flexibility. For example, we could instruct ES to return only
the response we are interested in [3]. In our searches, we are usually interested in the path
field and, when requested the facets fields. ES for each document returns the index name.
Since we use pretty long index names, only removing this would decrease the payload size by
20/30%.
> To have good performance and nice code we could keep using the query builders provided
by ES. The query builders output should then be used to perform the request to ES through
low-level client. The response needs to be parsed in OAK. 
> [1] https://www.elastic.co/guide/en/elasticsearch/client/java-rest/master/java-rest-high.html
> [2] https://discuss.elastic.co/t/performance-difference-between-java-high-level-rest-client-vs-low-level-rest-client/125775
> [3] https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#common-options-response-filtering
> Options



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