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https://issues.apache.org/jira/browse/SOLR-12356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16533050#comment-16533050
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Gus Heck commented on SOLR-12356:
---------------------------------
I don't like the idea of things being hidden (in general). And I think it
should be possible to easily replace whatever .system exists with one
configured to the user's needs (probably when first building or when upgrading
the cluster) also WRT sizing the use case that motivated SOLR-8349 which and
relies on the blob store too was a postal code geo lookup table for UK+US that
was around 1GB (and at the time the problem that was solved was that it was
getting replicated in memory 40 times for 40 cores).
> Always auto-create ".system" collection when in SolrCloud mode
> --------------------------------------------------------------
>
> Key: SOLR-12356
> URL: https://issues.apache.org/jira/browse/SOLR-12356
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Andrzej Bialecki
> Priority: Major
>
> The {{.system}} collection is currently used for blobs, and in SolrCloud mode
> it's also used for autoscaling history and as a metrics history store
> (SOLR-11779). It should be automatically created on Overseer start if it's
> missing.
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