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https://issues.apache.org/jira/browse/SOLR-11127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795401#comment-16795401
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Andrzej Bialecki commented on SOLR-11127:
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The latest patch. This includes a {{.system}} compatibility check that is
performed on {{Overseer}} leader startup. This verification only logs a warning
about the potentially incompatible index data, providing details of schema
fields that are likely incompatible. This should provide sufficient information
for users to decide whether to re-index the collection.
If there are no objections I'd like to commit this shortly.
> Add a Collections API command to migrate the .system collection schema from
> Trie-based (pre-7.0) to Points-based (7.0+)
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-11127
> URL: https://issues.apache.org/jira/browse/SOLR-11127
> Project: Solr
> Issue Type: Task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Steve Rowe
> Assignee: Andrzej Bialecki
> Priority: Blocker
> Labels: numeric-tries-to-points
> Fix For: 8.1, master (9.0)
>
> Attachments: SOLR-11127.patch, SOLR-11127.patch, SOLR-11127.patch,
> SOLR-11127.patch
>
>
> SOLR-11119 will switch the Trie fieldtypes in the .system collection's schema
> to Points.
> Users with pre-7.0 .system collections will no longer be able to use them
> once Trie fields have been removed (8.0).
> Solr should provide a Collections API command MIGRATESYSTEMCOLLECTION to
> automatically convert a Trie-based .system collection to a Points-based one.
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