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https://issues.apache.org/jira/browse/HDDS-8254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17705859#comment-17705859
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Sadanand Shenoy commented on HDDS-8254:
---------------------------------------

[~ritesh] , Based on some investigation , there is already a configĀ 
"hdds.datanode.storage.utilization.critical.threshold" which was added to mark 
a node out of space , although while I checked the code, this functionality 
seems to be broken and no action is taken even after marking it as out of 
space. I will work on it this week and probably raise a fix. The description is 
not very accurate , I will update as I find out more.

> Set a default for hdds.datanode.dir.du.reserved.percent
> -------------------------------------------------------
>
>                 Key: HDDS-8254
>                 URL: https://issues.apache.org/jira/browse/HDDS-8254
>             Project: Apache Ozone
>          Issue Type: Bug
>            Reporter: Sadanand Shenoy
>            Assignee: Sadanand Shenoy
>            Priority: Blocker
>
> Operations like block deletion etc require opening rocksdb instances and 
> opening these instances need some space on disk (for ops like rocksdb WAL 
> write) . When disks get full without a set reserved space, these operations 
> will be blocked leading to more issues.
> It is better to set a default reserved percentage to solve this.



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