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https://issues.apache.org/jira/browse/HDDS-12611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Andika updated HDDS-12611:
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Target Version/s: 2.0.0, 1.4.2 (was: 2.0.0)
> Snapshot creation is removing extra keys from AOS's DB
> ------------------------------------------------------
>
> Key: HDDS-12611
> URL: https://issues.apache.org/jira/browse/HDDS-12611
> Project: Apache Ozone
> Issue Type: Bug
> Components: Snapshot
> Reporter: Hemant Kumar
> Assignee: Hemant Kumar
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Attachments: Snapshot_orphan_blocks.jpg
>
>
> On snapshot creation, we are not usingthe correct prefix to remove keys from
> deletedTable of AOS’s DB. Prefix does not end with / (code) which means for
> bucket /vol1/buck1 we will move all the keys belonging to bucket /vol1/buck1
> and buckets /vol1/buck1[0-9]. This issue is only for OBS bucket and legacy.
> Here is an example, we have an Active Object store with keyTable and
> deletedTable.
> !Snapshot_orphan_blocks.jpg!
> Now, when Snap1 is taken on the bucket: {*}/vol1/buck1{*}.
> In current code, along with key {*}/vol1/buck1/key1{*}, keys
> */vol1/buck12/key1* and */vol1/buck12/key3* keys are removed from the
> deletedTable of AOS.
> This is wrong because Snasphot DeepClean and Snapshot Delete Service use the
> correct prefix ({*}/volumeName/bucektName/{*}) and will skip keys starting
> with prefixes other than {*}/vol1/buck1/{*}. Because of that keys
> */vol1/buck12/key1* and */vol1/buck12/key3* will never be reclaimed and
> result in orphan blocks in DN.
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