[jira] [Updated] (LUCENE-4586) Change default ResultMode of FacetRequest to PER_NODE_IN_TREE
[
https://issues.apache.org/jira/browse/LUCENE-4586?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shai Erera updated LUCENE-4586:
---
Attachment: LUCENE-4586.patch
Same patch, but moved the CHANGES entry under a "Changes in Runtime Behavior"
section
> Change default ResultMode of FacetRequest to PER_NODE_IN_TREE
> -
>
> Key: LUCENE-4586
> URL: https://issues.apache.org/jira/browse/LUCENE-4586
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
>Reporter: Shai Erera
>Assignee: Shai Erera
>Priority: Minor
> Fix For: 4.1, 5.0
>
> Attachments: LUCENE-4586.patch, LUCENE-4586.patch
>
>
> Today the default ResultMode is GLOBAL_FLAT, but it should be
> PER_NODE_IN_TREE. ResultMode is being used whenever you set the depth of
> FacetRequest to greater than 1. The difference between the two is:
> * PER_NODE_IN_TREE would then compute the top-K categories recursively, for
> every top category at every level (up to depth). The results are returned in
> a tree structure as well. For instance:
> {noformat}
> Date
> 2010
> March
> February
> 2011
> April
> May
> {noformat}
> * GLOBAL_FLAT computes the top categories among all the nodes up to depth,
> and returns a flat list of categories.
> GLOBAL_FLAT is faster to compute than PER_NODE_IN_TREE (it just computes
> top-K among N total categories), however I think that it's less intuitive,
> and therefore should not be used as a default. In fact, I think this is kind
> of an expert usage.
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[jira] [Updated] (LUCENE-4586) Change default ResultMode of FacetRequest to PER_NODE_IN_TREE
[
https://issues.apache.org/jira/browse/LUCENE-4586?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shai Erera updated LUCENE-4586:
---
Attachment: LUCENE-4586.patch
Patch changes the default ResultMode to PER_NODE_IN_TREE. That uncovered a
potential bug in TopKInEachNodeHandler where it didn't resolve ties on facet
values by ordinal -- this lead to inconsistent ordering of facet results
(discovered by SamplingWrapperTest).
I had to fix some tests that relied on GLOBAL_FLAT mode for results
verification (it's easier to verify results in that mode).
Added a CHANGES entry under back-compat changes.
All tests pass (tried many iterations).
> Change default ResultMode of FacetRequest to PER_NODE_IN_TREE
> -
>
> Key: LUCENE-4586
> URL: https://issues.apache.org/jira/browse/LUCENE-4586
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/facet
>Reporter: Shai Erera
>Assignee: Shai Erera
>Priority: Minor
> Fix For: 4.1, 5.0
>
> Attachments: LUCENE-4586.patch
>
>
> Today the default ResultMode is GLOBAL_FLAT, but it should be
> PER_NODE_IN_TREE. ResultMode is being used whenever you set the depth of
> FacetRequest to greater than 1. The difference between the two is:
> * PER_NODE_IN_TREE would then compute the top-K categories recursively, for
> every top category at every level (up to depth). The results are returned in
> a tree structure as well. For instance:
> {noformat}
> Date
> 2010
> March
> February
> 2011
> April
> May
> {noformat}
> * GLOBAL_FLAT computes the top categories among all the nodes up to depth,
> and returns a flat list of categories.
> GLOBAL_FLAT is faster to compute than PER_NODE_IN_TREE (it just computes
> top-K among N total categories), however I think that it's less intuitive,
> and therefore should not be used as a default. In fact, I think this is kind
> of an expert usage.
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