Struct exonum_merkledb::DbOptions

#[non_exhaustive]pub struct DbOptions {
    pub max_open_files: Option<i32>,
    pub create_if_missing: bool,
    pub compression_type: CompressionType,
}

Options for the database.

These parameters apply to the underlying database of Exonum, currently RocksDB.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

max_open_files: Option<i32>

Number of open files that can be used by the database.

The underlying database opens multiple files during operation. If your system has a limit on the number of files which can be open simultaneously, you can adjust this option to match the limit. Note, that limiting the number of simultaneously open files might slow down the speed of database operation.

Defaults to None, meaning that the number of open files is unlimited.

create_if_missing: bool

An option to indicate whether the system should create a database or not, if it's missing.

This option applies to the cases when a node was switched off and is on again. If the database cannot be found at the indicated path and this option is switched on, a new database will be created at that path and blocks will be included therein.

Defaults to true.

compression_type: CompressionType

An algorithm used for database compression.

Defaults to CompressionType::None, meaning there is no compression.

Methods

impl DbOptions

pub fn new(
    max_open_files: Option<i32>,
    create_if_missing: bool,
    compression_type: CompressionType
) -> Self

Creates a new DbOptions object.

Trait Implementations

impl Clone for DbOptions

fn clone(&self) -> DbOptions

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for DbOptions

impl Debug for DbOptions

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

Formats the value using the given formatter.

impl Default for DbOptions

fn default() -> Self

Returns the "default value" for a type.

impl<'de> Deserialize<'de> for DbOptions

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl<'_> From<&'_ DbOptions> for RocksDbOptions

fn from(opts: &DbOptions) -> Self

Performs the conversion.

impl From<DbOptions> for RocksDbOptions

fn from(opts: DbOptions) -> Self

Performs the conversion.

impl PartialEq<DbOptions> for DbOptions

fn eq(&self, other: &DbOptions) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &DbOptions) -> bool

This method tests for !=.

impl Serialize for DbOptions

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DbOptions