WIP: metabase: Add missing expiration epoch for object stored with EC #1585

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a-savchuk wants to merge 1 commit from a-savchuk:exp-epoch-for-object-with-ec into master

a-savchuk commented

2024-12-27 12:30:31 +00:00

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An expiration epoch of the original object should be stored in the expired objects index. In the described scenario, there's no way to determine the expiration epoch of the object from its chunks because a chunk's parent is a part of the original object, not the original object itself. However, the epoch can be determined from the linking object.

Previously, whether the epoch was stored or not depended on the order in which the chunks and linking object were written. Now it's fixed.

The absense of the expiration epoch prevented the GC from deleting this object upon its expiration.

Suppose there's a complex object stored with EC. It's divided into parts, and these parts are further divided into chunks, except for the linking object. The chunks and linking object are stored in the metabase. An expiration epoch of the original object should be stored in the expired objects index. In the described scenario, there's no way to determine the expiration epoch of the object from its chunks because a chunk's parent is a part of the original object, not the original object itself. However, the epoch can be determined from the linking object. Previously, whether the epoch was stored or not depended on the order in which the chunks and linking object were written. Now it's fixed. The absense of the expiration epoch prevented the GC from deleting this object upon its expiration.

a-savchuk commented

2024-12-27 12:36:22 +00:00

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This fix is for complex objects with EC only. Simple objects with EC need a fix as well, but it may take some time.

This fix is for _complex_ objects with EC only. Simple objects with EC need a fix as well, but it may take some time.

a-savchuk changed title from ~~WIP: metabase: Add missing expiration epoch for object stored with EC~~ to metabase: Add missing expiration epoch for object stored with EC

2024-12-27 12:55:49 +00:00

requested reviews from storage-core-committers, storage-core-developers

2024-12-27 12:55:51 +00:00

a-savchuk changed title from ~~metabase: Add missing expiration epoch for object stored with EC~~ to WIP: metabase: Add missing expiration epoch for object stored with EC

2024-12-27 13:36:55 +00:00

a-savchuk commented

2025-02-10 06:30:46 +00:00

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Closed in favor of #1602

Closed in favor of https://git.frostfs.info/TrueCloudLab/frostfs-node/pulls/1602

a-savchuk deleted branch exp-epoch-for-object-with-ec

2025-02-10 06:31:10 +00:00