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From "Joel Bernstein (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-8888) Add shortestPath Streaming Expression
Date Tue, 29 Mar 2016 14:15:25 GMT

     [ https://issues.apache.org/jira/browse/SOLR-8888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joel Bernstein updated SOLR-8888:
---------------------------------
    Description: 
This ticket is to implement a distributed shortest path graph traversal as a Streaming Expression.

Expression syntax:

{code}
shortestPath(collection, 
                     from="node1", 
                     to="node2",
                     edge="colA, colB",
                     threads="6",
                     partitionSize="300", 
                     fq="limiting query", 
                     maxDepth="4")
{code}

Th expression above performs a *breadth first search* to find the shortest path in an unweighted,
directed graph. The search is performed  *from* node1 *to* node2, traversing the *edge* columns
colA to colB iteratively. Each level in the traversal is implemented as a *parallel partitioned*
nested loop join. The *threads* parameter controls the number of threads performing the join.
The *partitionSize* controls the of number of nodes in each join partition. *maxDepth* controls
the number of levels to traverse. *fq* is a limiting query applied to each level in the traversal.

Future implementations can add more capabilities such as weighted traversals.

  was:
This ticket is to implement a distributed shortest path graph traversal as a Streaming Expression.

Expression syntax:

{code}
shortestPath(collection, 
                     from="node1", 
                     to="node2",
                     edge="colA, colB",
                     threads="6",
                     partitionSize="300", 
                     fq="limiting query", 
                     maxDepth="4")
{code}

Th expression above performs a *breadth first search* to find the shortest path in an unweighted,
directed graph. The search is performed  *from* node1 *to* node2, traversing the *edge* columns
colA to colB iteratively. Each level in the traversal is implemented as a *parallel partitioned*
nested loop join. The *threads* parameter controls the number of threads performing the join.
The *partitionSize* controls the of number nodes in each join partition. *maxDepth* controls
the number of levels to traverse. *fq* is a limiting query applied to each level in the traversal.

Future implementations can add more capabilities such as weighted traversals.


> Add shortestPath Streaming Expression
> -------------------------------------
>
>                 Key: SOLR-8888
>                 URL: https://issues.apache.org/jira/browse/SOLR-8888
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Joel Bernstein
>         Attachments: SOLR-8888.patch, SOLR-8888.patch, SOLR-8888.patch, SOLR-8888.patch
>
>
> This ticket is to implement a distributed shortest path graph traversal as a Streaming
Expression.
> Expression syntax:
> {code}
> shortestPath(collection, 
>                      from="node1", 
>                      to="node2",
>                      edge="colA, colB",
>                      threads="6",
>                      partitionSize="300", 
>                      fq="limiting query", 
>                      maxDepth="4")
> {code}
> Th expression above performs a *breadth first search* to find the shortest path in an
unweighted, directed graph. The search is performed  *from* node1 *to* node2, traversing the
*edge* columns colA to colB iteratively. Each level in the traversal is implemented as a *parallel
partitioned* nested loop join. The *threads* parameter controls the number of threads performing
the join. The *partitionSize* controls the of number of nodes in each join partition. *maxDepth*
controls the number of levels to traverse. *fq* is a limiting query applied to each level
in the traversal.
> Future implementations can add more capabilities such as weighted traversals.



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