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https://issues.apache.org/jira/browse/SOLR-16879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17813141#comment-17813141
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Pierre Salagnac commented on SOLR-16879:
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Thanks for reporting this.
I'm not sure why this method creates a bounded list with same size as the pool
size. I'll have a look at history and fix the regression appropriately.
> Throttle concurrent backups/restores per node
> ---------------------------------------------
>
> Key: SOLR-16879
> URL: https://issues.apache.org/jira/browse/SOLR-16879
> Project: Solr
> Issue Type: Improvement
> Components: Backup/Restore
> Affects Versions: 9.2.1
> Reporter: Pierre Salagnac
> Priority: Minor
> Time Spent: 3h
> Remaining Estimate: 0h
>
> If the collection is large enough, there very well could be many shards on
> one host and it could saturate the IO. Same issue if we backup many
> collections concurrently.
> We should have a protection mechanism, so a Solr node does not have transient
> failures during a large backup or restore.
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