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From "Atri Sharma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-8929) Early Terminating CollectorManager
Date Mon, 29 Jul 2019 06:51:00 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-8929?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Atri Sharma updated LUCENE-8929:
--------------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: LUCENE-8940

> Early Terminating CollectorManager
> ----------------------------------
>
>                 Key: LUCENE-8929
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8929
>             Project: Lucene - Core
>          Issue Type: Sub-task
>            Reporter: Atri Sharma
>            Priority: Major
>          Time Spent: 2h 50m
>  Remaining Estimate: 0h
>
> We should have an early terminating collector manager which accurately tracks hits across
all of its collectors and determines when there are enough hits, allowing all the collectors
to abort.
> The options for the same are:
> 1) Shared total count : Global "scoreboard" where all collectors update their current
hit count. At the end of each document's collection, collector checks if N > threshold,
and aborts if true
> 2) State Reporting Collectors: Collectors report their total number of counts collected
periodically using a callback mechanism, and get a proceed or abort decision.
> 1) has the overhead of synchronization in the hot path, 2) can collect unnecessary hits
before aborting.
> I am planning to work on 2), unless objections



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