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https://issues.apache.org/jira/browse/HDDS-9979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Krishna Kumar Asawa reassigned HDDS-9979:
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Assignee: Priyesh K (was: Zita Dombi)
> Sum of used, available, and reserved exceeds the physical volume size
> ---------------------------------------------------------------------
>
> Key: HDDS-9979
> URL: https://issues.apache.org/jira/browse/HDDS-9979
> Project: Apache Ozone
> Issue Type: Bug
> Components: DN
> Affects Versions: 1.4.0
> Reporter: Kohei Sugihara
> Assignee: Priyesh K
> Priority: Major
> Attachments: cluster1.csv, cluster1.png, cluster2.csv, cluster2.png,
> du.cluster1.csv, du.cluster2.csv, image-2024-01-08-19-31-38-781.png
>
>
> While reviewing DN metrics, I noticed the sum of Used, Available, and
> Reserved is different from the actual volume size. I don't survey Jira deeply
> for existing similar issues, so I'm appreciate tell me similar issues if you
> know. We experienced this issue in two clusters. Cluster #1 gains much data
> and experienced disk full many times.
> h2. Example 1: Cluster #1
> This cluster is consisted from 36 nodes. Each node has 36 -24- of 14 TB HDD
> drives. Expected total capacity per a single node is calculated by: 36 bays *
> 14 TB * 10^12 / 1024^4 = 458 TiB, so the sum of
> {{{}volume_info_metrics_{used,available,reserved{}}}} should be equal to 458
> TiB. However, we experience differ results.
> The cluster1.png shows a stacked bar graph. Reported metrics are vary and
> exceeds 458 TiB.
> !cluster1.png!
> h2. Example 2: Cluster #2
> This is another example and each node has 12 of 14 TB HDD drives. Expected
> total capacity per a single node is calculated by: 12 bays * 14 TB * 10^12 /
> 1024^4 = 153 TiB.
> The cluster2.png shows a stacked bar graph. Reported metrics is almost same
> among DNs but some exceptions exceed the physical capacity.
> !cluster2.png!
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