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https://issues.apache.org/jira/browse/LUCENE-8496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16637680#comment-16637680
 ] 

Lucene/Solr QA commented on LUCENE-8496:
----------------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 10 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  5m 
57s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  6m 
31s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  6m 
31s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Release audit (RAT) {color} | 
{color:green}  1m 44s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Check forbidden APIs {color} | 
{color:green}  0m 17s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate source patterns {color} | 
{color:green}  0m 17s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red}  7m 11s{color} 
| {color:red} codecs in the patch failed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 31m 
26s{color} | {color:green} core in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
16s{color} | {color:green} highlighter in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 
15s{color} | {color:green} join in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  0m 
17s{color} | {color:green} memory in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 
56s{color} | {color:green} sandbox in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 
45s{color} | {color:green} spatial-extras in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  5m 
53s{color} | {color:green} test-framework in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 87m 35s{color} 
| {color:red} core in the patch failed. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}163m 16s{color} | 
{color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | lucene.codecs.simpletext.TestSimpleTextPointsFormat |
|   | solr.cloud.autoscaling.IndexSizeTriggerTest |
|   | solr.cloud.autoscaling.sim.TestSimTriggerIntegration |
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|| Subsystem || Report/Notes ||
| JIRA Issue | LUCENE-8496 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12942299/LUCENE-8496.patch |
| Optional Tests |  compile  javac  unit  ratsources  checkforbiddenapis  
validatesourcepatterns  |
| uname | Linux lucene2-us-west.apache.org 4.4.0-112-generic #135-Ubuntu SMP 
Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | ant |
| Personality | 
/home/jenkins/jenkins-slave/workspace/PreCommit-LUCENE-Build/sourcedir/dev-tools/test-patch/lucene-solr-yetus-personality.sh
 |
| git revision | master / 46f753d |
| ant | version: Apache Ant(TM) version 1.9.6 compiled on July 20 2018 |
| Default Java | 1.8.0_172 |
| unit | 
https://builds.apache.org/job/PreCommit-LUCENE-Build/99/artifact/out/patch-unit-lucene_codecs.txt
 |
| unit | 
https://builds.apache.org/job/PreCommit-LUCENE-Build/99/artifact/out/patch-unit-solr_core.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-LUCENE-Build/99/testReport/ |
| modules | C: lucene lucene/codecs lucene/core lucene/highlighter lucene/join 
lucene/memory lucene/sandbox lucene/spatial-extras lucene/test-framework 
solr/core U: . |
| Console output | 
https://builds.apache.org/job/PreCommit-LUCENE-Build/99/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Explore selective dimension indexing in BKDReader/Writer
> --------------------------------------------------------
>
>                 Key: LUCENE-8496
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8496
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Nicholas Knize
>            Priority: Major
>         Attachments: LUCENE-8496.patch, LUCENE-8496.patch, LUCENE-8496.patch, 
> LUCENE-8496.patch, LatLonShape_SelectiveEncoding.patch
>
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> This issue explores adding a new feature to BKDReader/Writer that enables 
> users to select a fewer number of dimensions to be used for creating the BKD 
> index than the total number of dimensions specified for field encoding. This 
> is useful for encoding dimensional data that is used for interpreting the 
> encoded field data but unnecessary (or not efficient) for creating the index 
> structure. One such example is {{LatLonShape}} encoding. The first 4 
> dimensions may be used to to efficiently search/index the triangle using its 
> precomputed bounding box as a 4D point, and the remaining dimensions can be 
> used to encode the vertices of the tessellated triangle. This causes BKD to 
> act much like an R-Tree for shape data where search is distilled into a 4D 
> point (instead of a more expensive 6D point) and the triangle is encoded 
> using a portion of the remaining (non-indexed) dimensions. Fields that use 
> the full data range for indexing are not impacted and behave as they normally 
> would.



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