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Include old_versions when merging layouts, don't remove old layout versions #854

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dominik wants to merge 3 commits from dominik/garage:historical_layout_fix into main
pull from: dominik/garage:historical_layout_fix
merge into: Deuxfleurs:main
Conversation 1 Commits 3 Files changed 2 +13 -11
dominik commented 2024-08-15 15:49:27 +00:00
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I have run into the same problem as described in #841 After investigating, I've realized only active layout versions are used to update the node's layout. If we are joining a new/fresh node, it wouldn't be able to successfully sync its layout with existing nodes.

This is also why I have removed code for removing old layout versions, as potentially they might be needed in the future when adding new nodes.

Would appreciate is there would be a v1.0.1 release fixing this problem.

Disclaimer: I don't know what I'm doing. I've never written or read any Rust code before. I don't know if this change would have some unintended consequences. I have tested it and seems to work fine.

I have run into the same problem as described in https://git.deuxfleurs.fr/Deuxfleurs/garage/issues/841 After investigating, I've realized only active layout versions are used to update the node's layout. If we are joining a new/fresh node, it wouldn't be able to successfully sync its layout with existing nodes. This is also why I have removed code for removing old layout versions, as potentially they might be needed in the future when adding new nodes. Would appreciate is there would be a v1.0.1 release fixing this problem. Disclaimer: I don't know what I'm doing. I've never written or read any Rust code before. I don't know if this change would have some unintended consequences. I have tested it and seems to work fine.
dominik added 1 commit 2024-08-15 15:49:28 +00:00
Include old_versions when merging layouts, don't remove old layout versions
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f8d0affd82
dominik added 1 commit 2024-08-19 16:37:15 +00:00
Consider both old and current versions when verifying layout history
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dominik added 1 commit 2024-08-19 18:32:39 +00:00
Fix fmt
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lx commented 2024-08-24 10:17:04 +00:00
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Hey, thank you very much for your involvement and for making this PR. Unfortunately, I think this is not the correct way to fix this issue, because we do want the old version list to be bounded. If it were not bounded, this would cause unlimited growth of network traffic when Garage clusters become older and start accumulating historical layouts. I am preparing a patch with hopefully a good solution to this issue.

Hey, thank you very much for your involvement and for making this PR. Unfortunately, I think this is not the correct way to fix this issue, because we do want the old version list to be bounded. If it were not bounded, this would cause unlimited growth of network traffic when Garage clusters become older and start accumulating historical layouts. I am preparing a patch with hopefully a good solution to this issue.
lx closed this pull request 2024-08-24 10:17:05 +00:00
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Reference: Deuxfleurs/garage#854
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