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https://issues.apache.org/jira/browse/HDDS-8402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17711130#comment-17711130
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Ethan Rose commented on HDDS-8402:
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{quote}Could it be due to the open databases that need extra space on the disk?
{quote}
Containers created after ozone 1.3.0 will use one RocksDB per volume (container
schema V3). Containers created before that will use one RocksDB per container
(container schema V2). With schema V2, there will be many more RocksDB
instances so there is a higher chance that threshold is crossed before datanode
realizes it, because RocksDB size would only be updated when the du is run
every hour. For schema V3 since there is only one RocksDB there should be less
space overhead and datanode would probably realize the true space used sooner.
> hdds.datanode.dir.du.reserved is not respected
> ----------------------------------------------
>
> Key: HDDS-8402
> URL: https://issues.apache.org/jira/browse/HDDS-8402
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Mohanad Elsafty
> Priority: Major
>
> hdds.datanode.dir.du.reserved is not being respected by some of the datanodes
> in my cluster.
> Actually I have this patch in my codebase
> https://issues.apache.org/jira/browse/HDDS-6577 still not being respected.
>
> {code:java}
> <property>
> <name>hdds.datanode.dir</name>
> <value>/mnt/disk/0/ozone,/mnt/disk/1/ozone,/mnt/disk/2/ozone,/mnt/disk/3/ozone,/mnt/disk/4/ozone,/mnt/disk/5/ozone,/mnt/disk/6/ozone,/mnt/disk/7/ozone,/mnt/disk/8/ozone,/mnt/disk/9/ozone,/mnt/disk/10/ozone</value>
> </property>
> <property>
> <name>hdds.datanode.dir.du.reserved</name>
> <value>/mnt/disk/0/ozone:50GB,/mnt/disk/1/ozone:50GB,/mnt/disk/2/ozone:50GB,/mnt/disk/3/ozone:50GB,/mnt/disk/4/ozone:50GB,/mnt/disk/5/ozone:50GB,/mnt/disk/6/ozone:50GB,/mnt/disk/7/ozone:50GB,/mnt/disk/8/ozone:50GB,/mnt/disk/9/ozone:50GB,/mnt/disk/10/ozone:50GB
> </value>
> </property> {code}
> {code:java}
> $ df -h
> /dev/sdi 7.3T 6.9T 35G 100% /mnt/disk/7
> {code}
>
> I have several similar cases to this one. Could it be due to the open
> databses that need extra space on the disk?
>
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