Struct parity_db::Options

pub struct Options {
    pub path: PathBuf,
    pub columns: Vec<ColumnOptions>,
    pub sync_wal: bool,
    pub sync_data: bool,
    pub stats: bool,
    pub salt: Option<[u8; 32]>,
    pub compression_threshold: HashMap<ColId, u32>,
}

Database configuration.

Fields

path: PathBuf

Database path.

columns: Vec<ColumnOptions>

Column settings

sync_wal: bool

fsync WAL to disk before committing any changes. Provides extra consistency guarantees. On by default.

sync_data: bool

fsync/msync data to disk before removing logs. Provides crash resistance guarantee. On by default.

stats: bool

Collect database statistics. May have effect on performance.

salt: Option<[u8; 32]>

Override salt value. If None is specified salt is loaded from metadata or randomly generated when creating a new database.

compression_threshold: HashMap<ColId, u32>

Minimal value size threshold to attempt compressing a value per column.

Optional. A sensible default is used if nothing is set for a given column.

Implementations

impl Options

pub fn with_columns(path: &Path, num_columns: u8) -> Options

pub fn write_metadata(&self, path: &Path, salt: &[u8; 32]) -> Result<()>

pub fn write_metadata_file(&self, path: &Path, salt: &[u8; 32]) -> Result<()>

pub fn write_metadata_with_version( &self, path: &Path, salt: &[u8; 32], version: Option<u32> ) -> Result<()>

pub fn write_metadata_file_with_version( &self, path: &Path, salt: &[u8; 32], version: Option<u32> ) -> Result<()>

pub fn load_and_validate_metadata(&self, create: bool) -> Result<Metadata>

pub fn load_metadata(path: &Path) -> Result<Option<Metadata>>

pub fn load_metadata_file(path: &Path) -> Result<Option<Metadata>>

pub fn is_valid(&self) -> bool

Trait Implementations

impl Clone for Options

fn clone(&self) -> Options

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Options

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.