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https://issues.apache.org/jira/browse/SOLR-11127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16780903#comment-16780903
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Andrzej Bialecki commented on SOLR-11127:
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This patch implements a REINDEX_COLLECTION command (NOTE: it depends on the
changes in SOLR-13271). It uses the procedure described above. A daemon
streaming expression is used for copying documents between collections.
The new command supports reindexing any collection, with the usual caveats
about potential data loss, and it supports the following:
* different or the same source and target collection name (by using aliases, as
described above)
* most collection CREATE parameters are supported too, which allows re-shaping
the collection (eg. changing the number of shards, the router, etc)
Comments and review very appreciated!
> 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: 8.0
>
> Attachments: 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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