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StorageEngine

featherdb_storage

Struct StorageEngine 

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pub struct StorageEngine { /* private fields */ }
Expand description

The storage engine, managing all disk I/O and page caching

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impl StorageEngine

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pub fn open(config: Config) -> Result<Self>

Open or create a storage engine

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pub fn buffer_pool(&self) -> &Arc<BufferPool>

Get the buffer pool

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pub fn file_manager(&self) -> &Arc<FileManager>

Get the file manager

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pub fn wal(&self) -> &Arc<RwLock<Wal>>

Get the WAL

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pub fn allocate_page(&self) -> Result<PageId>

Allocate a new page

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pub fn free_page(&self, page_id: PageId) -> Result<()>

Free a page

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pub fn sync(&self) -> Result<()>

Sync all data to disk

This ensures all buffered writes are persisted to disk. Should be called after flush_all() to ensure durability.

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pub fn checkpoint(&self) -> Result<Lsn>

Checkpoint: flush all dirty pages and truncate WAL

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pub fn shutdown(&self) -> Result<()>

Graceful shutdown: flush all pages, sync, and shut down WAL

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pub fn recover(&self) -> Result<RecoveryStats>

Recover from crash using WAL with two-pass replay

Pass 1: Scan WAL to find committed vs aborted transactions Pass 2: Replay only writes from committed transactions

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pub fn sync_on_commit(&self) -> bool

Check if sync-on-commit is enabled

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pub fn config(&self) -> &Config

Get configuration

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pub fn wal_stats(&self) -> WalStatsSnapshot

Get WAL statistics snapshot

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pub fn compression_stats(&self) -> CompressionStatsSnapshot

Get compression statistics snapshot

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pub fn storage_quota(&self) -> StorageQuota

Get current storage quota information

Returns information about database and WAL file sizes, configured limits, and available disk space.

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