The current two core['core'].replace calls in https://github.com/apache/lucene-solr/blob/releases/lucene-solr/7.5.0/solr/webapp/web/js/angular/controllers/cloud.js#L410-L416 assume replica_?[ntp]?\d+ format and strangely handle/hide cores which have (say) a replica-foo_bar format.
This ticket proposes to accommodate replica* format.
Such replicas can be created via the Collections API e.g.
via the name parameter. That parameter is undocumented at present (oversight or intentional?) but it works and so it would be nice for the Nodes view to accommodate the replica* format.
Attribution: my colleague Daniel Collins first noticed locally that the 'Disk usage' column content was there for some nodes but not for others; i then got curious as to the reason and the investigation led to this JIRA ticket here.