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https://issues.apache.org/jira/browse/HDDS-14435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18052753#comment-18052753
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Sarveksha Yeshavantha Raju commented on HDDS-14435:
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Post HDDS-13756 merge, I’ve observed that updates to {{usedBytes}} and
{{usedNamespace}} are slow after deleting a few keys from an OBS bucket.
{code:java}
bash-5.1$ ozone sh key delete s3v/obs1/key1
bash-5.1$ ozone sh key delete s3v/obs1/key2
bash-5.1$ ozone sh bucket list s3v
[ {
"metadata" : { },
"volumeName" : "s3v",
"name" : "obs1",
"storageType" : "DISK",
"versioning" : false,
"listCacheSize" : 1000,
"usedBytes" : 4218,
"usedNamespace" : 2,
"creationTime" : "2026-01-17T09:15:51.388Z",
"modificationTime" : "2026-01-17T09:15:51.388Z",
"sourcePathExist" : true,
"quotaInBytes" : -1,
"quotaInNamespace" : -1,
"bucketLayout" : "OBJECT_STORE",
"owner" : "om",
"link" : false
} ] {code}
It took ~30 seconds for the values to reduce to 0.
{code:java}
bash-5.1$ ozone sh bucket list s3v
[ {
"metadata" : { },
"volumeName" : "s3v",
"name" : "obs1",
"storageType" : "DISK",
"versioning" : false,
"listCacheSize" : 1000,
"usedBytes" : 0,
"usedNamespace" : 0,
"creationTime" : "2026-01-17T09:15:51.388Z",
"modificationTime" : "2026-01-17T09:15:51.388Z",
"sourcePathExist" : true,
"quotaInBytes" : -1,
"quotaInNamespace" : -1,
"bucketLayout" : "OBJECT_STORE",
"owner" : "om",
"link" : false
} ] {code}
> usedNamespace is being decremented incorrectly
> ----------------------------------------------
>
> Key: HDDS-14435
> URL: https://issues.apache.org/jira/browse/HDDS-14435
> Project: Apache Ozone
> Issue Type: Bug
> Affects Versions: 2.1.0
> Reporter: Wei-Chiu Chuang
> Assignee: Aswin Shakil
> Priority: Major
>
> [~sarvekshayr] reported that after HDDS-13756 seems to cause a regression:
> https://github.com/apache/ozone/pull/9115#discussion_r2685116012
> {noformat}
> After this PR, observed an issue where usedBytes is high while usedNamespace
> is 0, even though the bucket has no keys.
> It appears that usedNamespace is being decremented incorrectly. In the
> overwrite case, the namespace seems to be reduced twice, whereas it should
> done once by 1.
> Since the bucket has no data, this likely indicates a problem in how
> namespace is being updated during the commit or delete flow.
> {noformat}
> [~aswinshakil] [~smeng]
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