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https://issues.apache.org/jira/browse/SOLR-6278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14149698#comment-14149698
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Erick Erickson commented on SOLR-6278:
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bq: The most straightforward way I can think of is using all directories under
it as core names.
Hmmm, this is actually do-able right now with the core admin API or the admin
web interface on the particular node.
NOTE: I'm running 4.8.1
a command like:
http://192.168.1.201:7500/solr/admin/cores?action=UNLOAD&deleteInstanceDir=true&core=eoe1_shard8_replica1
deletes the core, reclaims all the disk space and de-registers the node with ZK.
>From the solr/admin screen, you can select the core and hit the "UNLOAD"
>button and the core is gone and de-registered from the cluster state.
>Currently it does NOT come back when you reboot as all the core.properties
>files are renamed core.properties.unloaded. The directory is left intact
>though on the disk and needs to be manually removed.
If the node is down for some reason one can delete everything in that specific
SOLR_HOME of course.The cluster state can be cleaned up with the onlyIfDown
parameter to the DELETEREPLICA collections API command (new).
So it seems like this scenario is covered, and introducing this would add some
complexity so I think I'll mark this as "won't fix" if we agree.
> add admin/collections?action=DELETEREPLICA&core=... support, make
> collection=... and shard=... parameters optional
> ------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-6278
> URL: https://issues.apache.org/jira/browse/SOLR-6278
> Project: Solr
> Issue Type: Improvement
> Reporter: Christine Poerschke
> Assignee: Erick Erickson
> Attachments: SOLR-6278.patch
>
>
> To add {{core=...}} as an alternative to {{replica=...}} way of identifying
> what is to be deleted, {{collection=...}} and {{shard=...}} to be optional
> provided the other parameters uniquely identify exactly one deletion target.
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