Struct Config

pub struct Config {
    pub max_space_amp: u8,
    pub max_log_length: usize,
    pub merge_ratio: u8,
    pub merge_window: u8,
    pub log_bufwriter_size: u32,
    pub zstd_sstable_compression_level: u8,
}

Fields

max_space_amp: u8

If on-disk uncompressed sstable data exceeds in-memory usage by this proportion, a full-compaction of all sstables will occur. This is only likely to happen in situations where multiple versions of most of the database’s keys exist in multiple sstables, but should never happen for workloads where mostly new keys are being written.

max_log_length: usize

When the log file exceeds this size, a new compressed and compacted sstable will be flushed to disk and the log file will be truncated.

merge_ratio: u8

When the background compactor thread looks for contiguous ranges of sstables to merge, it will require all sstables to be at least 1/merge_ratio * the size of the first sstable in the contiguous window under consideration.

merge_window: u8

When the background compactor thread looks for ranges of sstables to merge, it will require ranges to be at least this long.

log_bufwriter_size: u32

All inserts go directly to a BufWriter wrapping the log file. This option determines how large that in-memory buffer is.

zstd_sstable_compression_level: u8

The level of compression to use for the sstables with zstd.

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Config

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

Formats the value using the given formatter.

impl Default for Config

fn default() -> Config

Returns the “default value” for a type.

impl Copy for Config