Struct grebedb::Options[−][src]

pub struct Options {
    pub open_mode: OpenMode,
    pub keys_per_node: usize,
    pub page_cache_size: usize,
    pub file_locking: bool,
    pub file_sync: SyncOption,
    pub automatic_flush: bool,
    pub automatic_flush_threshold: usize,
    pub compression_level: CompressionLevel,
}

Database configuration options.

Fields

open_mode: OpenMode

Option when opening a database. Default: LoadOrCreate.

keys_per_node: usize

Maximum number of keys per node. Default: 1024.

This value specifies the threshold when node is split into two and the tree is rebalanced.

page_cache_size: usize

Number of pages held in memory cache. Default: 64.

file_locking: bool

Whether to use file locking to prevent corruption by multiple processes. Default: true.

file_sync: SyncOption

Level of file synchronization to increase durability on disk file systems. Default: Data

automatic_flush: bool

Whether to flush the data to the file system periodically when a database operation is performed. Default: true.

When true, data is flushed when the database is dropped or when enough modifications accumulate.

There is no background maintenance thread that does automatic flushing; automatic flushing occurs when a database modifying function, such as put() or remove(), is called.

automatic_flush_threshold: usize

Number of modifications required for automatic flush to be considered. Default: 2048

When the threshold is reached after 300 seconds, or the threshold × 2 is reached after 60 seconds, a flush is scheduled to be performed on the next modification.

compression_level: CompressionLevel

Compression level for each page. Default: Fast.

Trait Implementations

impl Clone for Options[src]

impl Debug for Options[src]

impl Default for Options[src]

Auto Trait Implementations

impl RefUnwindSafe for Options

impl Send for Options

impl Sync for Options

impl Unpin for Options

impl UnwindSafe for Options

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, [src]

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.