[jira] [Updated] (SPARK-18454) Changes to fix Nearest Neighbor Search for LSH

["Yun Ni (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-18454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yun Ni updated SPARK-18454:
---------------------------
    Summary: Changes to fix Nearest Neighbor Search for LSH  (was: Changes to fix Multi-Probe Nearest Neighbor Search for LSH)

> Changes to fix Nearest Neighbor Search for LSH
> ----------------------------------------------
>
>                 Key: SPARK-18454
>                 URL: https://issues.apache.org/jira/browse/SPARK-18454
>             Project: Spark
>          Issue Type: Improvement
>            Reporter: Yun Ni
>
> We all agree to do the following improvement to Multi-Probe NN Search:
> (1) Use approxQuantile to get the {{hashDistance}} threshold instead of doing full sort on the whole dataset
> Currently we are still discussing the following:
> (1) What {{hashDistance}} (or Probing Sequence) we should use for {{MinHash}}
> (2) How we should change the current MultiProbe implementation to make it align with the MultiProbe NN Search from the origin paper: http://www.cs.princeton.edu/cass/papers/mplsh_vldb07.pdf



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