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https://issues.apache.org/jira/browse/SOLR-13320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16794015#comment-16794015
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Scott Blum commented on SOLR-13320:
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Shalin lemme break this down a bit...
Imagine you're restoring a collection from a backup, but you want to be able to
accept writes while this is in progress. You start accepting writes (of new
data) on the new, empty collection, then in the background you want to backfill
from your backup copy, but you don't want to overwrite anything that has been
written recently.
Setting "version:-1" on all the incoming, backfill doc is almost what you
want-- add any documents that don't exist, but don't overwrite any documents
that do exist. The problem is that the entire batch gets rejected if even one
document already exists. We just want a way to be able to ignore conflicts and
quietly drop the offending documents rather than rejecting the entire batch.
"ignoreConflicts" might be a better name.
> add a param ignoreDuplicates=true to updates to not overwrite existing docs
> ---------------------------------------------------------------------------
>
> Key: SOLR-13320
> URL: https://issues.apache.org/jira/browse/SOLR-13320
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Noble Paul
> Assignee: Noble Paul
> Priority: Major
>
> Updates should have an option to ignore duplicate documents and drop them if
> an option {{ignoreDuplicates=true}} is specified
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