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From "Joel Bernstein (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-10426) Add shuffle Streaming Expression
Date Wed, 05 Apr 2017 18:50:41 GMT

     [ https://issues.apache.org/jira/browse/SOLR-10426?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joel Bernstein updated SOLR-10426:
----------------------------------
    Description: 
Currently the concept of MapReduce shuffling is lumped into the *search* Streaming Expression.
This causes quite a bit of confusion as users perform a search using the /select handler by
default, but actually wanted shuffling behavior which requires the /export handler.

We can solve this problem by creating a separate function called *shuffle* that always uses
the /export handler.

This will also allow us to clean up some behaviors in the search expression that are somewhat
unexpected in future tickets.
{code}
    parallel(workers, 
         unique(shuffle(collection1, 
                        q=*:*, 
                        fl="id,a_s,a_i,a_f", 
                        sort="a_f asc, a_i asc", 
                        partitionKeys="a_f"), 
              over="a_f"), 
        workers="2",sort="a_f asc")
{code}

  was:
Currently the concept of MapReduce shuffling is lumped into the *search* Streaming Expression.
This causes quite a bit of confusion as users perform a search using the /select handler by
default, but actually wanted shuffling behavior which requires the /export handler.

We can solve this problem by creating a separate function called *shuffle* that always uses
the /export handler.

This will also allow us to clean up some behaviors in the search expression that are somewhat
unexpected in future tickets.


> Add shuffle Streaming Expression
> --------------------------------
>
>                 Key: SOLR-10426
>                 URL: https://issues.apache.org/jira/browse/SOLR-10426
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>         Attachments: SOLR-10426.patch
>
>
> Currently the concept of MapReduce shuffling is lumped into the *search* Streaming Expression.
This causes quite a bit of confusion as users perform a search using the /select handler by
default, but actually wanted shuffling behavior which requires the /export handler.
> We can solve this problem by creating a separate function called *shuffle* that always
uses the /export handler.
> This will also allow us to clean up some behaviors in the search expression that are
somewhat unexpected in future tickets.
> {code}
>     parallel(workers, 
>          unique(shuffle(collection1, 
>                         q=*:*, 
>                         fl="id,a_s,a_i,a_f", 
>                         sort="a_f asc, a_i asc", 
>                         partitionKeys="a_f"), 
>               over="a_f"), 
>         workers="2",sort="a_f asc")
> {code}



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