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Call AccountsDb::clean_accounts() directly, inside Bank::verify_snapshot_bank()#27258
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brooksprumo merged 1 commit intosolana-labs:masterfrom Aug 22, 2022
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Aug 19, 2022
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| self.rc | ||
| .accounts | ||
| .accounts_db | ||
| .clean_accounts(None, true, Some(last_full_snapshot_slot)); |
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Note that previously we'd call clean_accounts() with max_clean_root = Some(self.slot() - 1), and now we call clean_accounts() with max_root = None.
I believe this is safe for the reasons I put in the PR description. Please let me know if I've missed something!
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Problem
On startup from a snapshot, the bank is verified after deserialization. In that fn,
Bank::verify_snapshot_bank(), it callscleanandshrink. However,cleanandshrinkspecify differentmax_clean_roots. These should be the same.Since were at startup, there's no outstanding scans that could occur, and no reason why we cannot clean all slots. We do need to make sure 0-lamport accounts are still kept around for slots past the last full snapshot, and that behavior has not changed.
See #27200 for full context
Summary of Changes
In
Bank::verify_snapshot_bank(), callAccountsDb::clean_accounts()directly, and setmax_clean_rootstoNone.