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From "Pushkar Raste (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-9506) cache IndexFingerprint for each segment
Date Tue, 18 Oct 2016 14:59:59 GMT

    [ https://issues.apache.org/jira/browse/SOLR-9506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15585677#comment-15585677
] 

Pushkar Raste commented on SOLR-9506:
-------------------------------------

I don't see why caching indexfingerprint per segment and using that later would be different
than computing indexfingerprint on entire segment by going through one segment at time. 

I tried to come up with scenarios where caching solution would fail and original solution
would not, but could not think of any. 


> cache IndexFingerprint for each segment
> ---------------------------------------
>
>                 Key: SOLR-9506
>                 URL: https://issues.apache.org/jira/browse/SOLR-9506
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Noble Paul
>         Attachments: SOLR-9506.patch, SOLR-9506.patch, SOLR-9506_POC.patch
>
>
> The IndexFingerprint is cached per index searcher. it is quite useless during high throughput
indexing. If the fingerprint is cached per segment it will make it vastly more efficient to
compute the fingerprint



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