# FEATURE REQUEST: If pre\_upgrade fails, revert canister to earlier state snapshot of before pre\_upgrade ran and discard current pre\_upgrade logic

**URL:** <https://forum.dfinity.org/t/feature-request-if-pre-upgrade-fails-revert-canister-to-earlier-state-snapshot-of-before-pre-upgrade-ran-and-discard-current-pre-upgrade-logic/17605>\
**Category:** Rust\
**Created:** [December 22, 2022, 11:00am UTC](https://forum.dfinity.org/t/feature-request-if-pre-upgrade-fails-revert-canister-to-earlier-state-snapshot-of-before-pre-upgrade-ran-and-discard-current-pre-upgrade-logic/17605 "2022-12-22T11:00:43Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![paulyoung](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/paulyoung/32/5251_2.png) [@paulyoung](https://forum.dfinity.org/u/paulyoung)\
**Post date:** [December 23, 2022, 6:52pm UTC](https://forum.dfinity.org/t/feature-request-if-pre-upgrade-fails-revert-canister-to-earlier-state-snapshot-of-before-pre-upgrade-ran-and-discard-current-pre-upgrade-logic/17605/13 "2022-12-23T18:52:56Z")

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> [@roman-kashitsyn](#):
>
> Note that nothing stops you from calling the `pre_upgrade` hook from your `post_upgrade` hook. You don’t need a new system feature for that.

I suppose the trade off here is that it could be an expensive operation.

* * *

> [@roman-kashitsyn](#):
>
> Note that nothing stops you from calling the `pre_upgrade` hook from your `post_upgrade` hook. You don’t need a new system feature for that.

There was a feature mentioned at some point that would allow backing up and restoring canisters.

Not only might that mitigate some of the risk around upgrades, it could potentially be used to test upgrades locally with a similar volume of data as in a production environment.

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