reddb::storage::wal

Struct WalReader

pub struct WalReader { /* private fields */ }

Expand description

Reader for the Write-Ahead Log

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impl WalReader

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pub fn open(path: P) -> Result<WalReader, Error>
where P: AsRef<Path>,

Open a WAL file for reading

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pub fn iter(self) -> WalIterator ⓘ

Iterate over records Returns iterator that yields (LSn, WalRecord)

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pub fn collect_full_page_images( path: P, ) -> Result<BTreeMap<u32, (u64, Vec<u8>)>, Error>
where P: AsRef<Path>,

Scan a WAL file and collect the most recent full-page image for each page id observed. Returned map is page_id → (lsn, data). Recovery applies these images before redo so torn writes are healed without the legacy -dwb sidecar (gh-478).

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impl UnwindSafe for WalReader

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