Struct sled::ConfigBuilder

pub struct ConfigBuilder { /* fields omitted */ }

Top-level configuration for the system.

Examples

let _config = pagecache::ConfigBuilder::default()
    .path("/path/to/data".to_owned())
    .cache_capacity(10_000_000_000)
    .use_compression(true)
    .flush_every_ms(Some(1000))
    .snapshot_after_ops(100_000);

Read-only mode

let _config = pagecache::ConfigBuilder::default()
    .path("/path/to/data".to_owned())
    .read_only(true);

Methods

impl ConfigBuilder

pub fn new() -> ConfigBuilder

Returns a default ConfigBuilder

pub fn path<P>(self, path: P) -> ConfigBuilder where
    P: AsRef<Path>, 

Set the path of the database (builder).

pub fn set_path<P>(&mut self, path: P) where
    P: AsRef<Path>, 

Set the path of the database

pub fn merge_operator(
    self,
    mo: fn(&[u8], Option<&[u8]>, &[u8]) -> Option<Vec<u8>>
) -> ConfigBuilder

Set the merge operator that can be relied on during merges in the PageCache.

pub fn build(self) -> Config

Finalize the configuration.

pub fn set_io_bufs(&mut self, to: usize)

number of io buffers

pub fn io_bufs(self, to: usize) -> ConfigBuilder

number of io buffers

pub fn set_io_buf_size(&mut self, to: usize)

size of each io flush buffer. MUST be multiple of 512!

pub fn io_buf_size(self, to: usize) -> ConfigBuilder

size of each io flush buffer. MUST be multiple of 512!

pub fn set_min_items_per_segment(&mut self, to: usize)

minimum data chunks/pages in a segment.

pub fn min_items_per_segment(self, to: usize) -> ConfigBuilder

minimum data chunks/pages in a segment.

pub fn set_blink_fanout(&mut self, to: usize)

b-link node fanout, minimum of 2

pub fn blink_fanout(self, to: usize) -> ConfigBuilder

b-link node fanout, minimum of 2

pub fn set_page_consolidation_threshold(&mut self, to: usize)

page consolidation threshold

pub fn page_consolidation_threshold(self, to: usize) -> ConfigBuilder

page consolidation threshold

pub fn set_temporary(&mut self, to: bool)

if this database should be removed after the ConfigBuilder is dropped

pub fn temporary(self, to: bool) -> ConfigBuilder

if this database should be removed after the ConfigBuilder is dropped

pub fn set_read_only(&mut self, to: bool)

whether to run in read-only mode

pub fn read_only(self, to: bool) -> ConfigBuilder

whether to run in read-only mode

pub fn set_cache_bits(&mut self, to: usize)

log base 2 of the number of cache shards

pub fn cache_bits(self, to: usize) -> ConfigBuilder

log base 2 of the number of cache shards

pub fn set_cache_capacity(&mut self, to: usize)

maximum size for the system page cache

pub fn cache_capacity(self, to: usize) -> ConfigBuilder

maximum size for the system page cache

pub fn set_use_os_cache(&mut self, to: bool)

whether to use the OS page cache

pub fn use_os_cache(self, to: bool) -> ConfigBuilder

whether to use the OS page cache

pub fn set_use_compression(&mut self, to: bool)

whether to use zstd compression

pub fn use_compression(self, to: bool) -> ConfigBuilder

whether to use zstd compression

pub fn set_zstd_compression_factor(&mut self, to: i32)

the compression factor to use with zstd compression

pub fn zstd_compression_factor(self, to: i32) -> ConfigBuilder

the compression factor to use with zstd compression

pub fn set_flush_every_ms(&mut self, to: Option<u64>)

number of ms between IO buffer flushes

pub fn flush_every_ms(self, to: Option<u64>) -> ConfigBuilder

number of ms between IO buffer flushes

pub fn set_snapshot_after_ops(&mut self, to: usize)

number of operations between page table snapshots

pub fn snapshot_after_ops(self, to: usize) -> ConfigBuilder

number of operations between page table snapshots

pub fn set_cache_fixup_threshold(&mut self, to: usize)

the maximum length of a cached page fragment chain

pub fn cache_fixup_threshold(self, to: usize) -> ConfigBuilder

the maximum length of a cached page fragment chain

pub fn set_segment_cleanup_threshold(&mut self, to: f64)

the proportion of remaining valid pages in the segment

pub fn segment_cleanup_threshold(self, to: f64) -> ConfigBuilder

the proportion of remaining valid pages in the segment

pub fn set_min_free_segments(&mut self, to: usize)

the minimum number of free segments to have on-deck before a compaction occurs

pub fn min_free_segments(self, to: usize) -> ConfigBuilder

the minimum number of free segments to have on-deck before a compaction occurs

pub fn set_zero_copy_storage(&mut self, to: bool)

disabling of the log segment copy cleaner

pub fn zero_copy_storage(self, to: bool) -> ConfigBuilder

disabling of the log segment copy cleaner

pub fn set_segment_mode(&mut self, to: SegmentMode)

the file segment selection mode

pub fn segment_mode(self, to: SegmentMode) -> ConfigBuilder

the file segment selection mode

pub fn set_snapshot_path(&mut self, to: Option<PathBuf>)

snapshot file location

pub fn snapshot_path(self, to: Option<PathBuf>) -> ConfigBuilder

snapshot file location

Trait Implementations

impl Default for ConfigBuilder

fn default() -> ConfigBuilder

Returns the "default value" for a type.

impl Send for ConfigBuilder

impl<'de> Deserialize<'de> for ConfigBuilder

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

Deserialize this value from the given Serde deserializer.

impl Clone for ConfigBuilder

fn clone(&self) -> ConfigBuilder

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq<ConfigBuilder> for ConfigBuilder

fn eq(&self, __arg_0: &ConfigBuilder) -> bool

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

fn ne(&self, __arg_0: &ConfigBuilder) -> bool

This method tests for !=.

impl Serialize for ConfigBuilder

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

Serialize this value into the given Serde serializer.

impl Debug for ConfigBuilder

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.