Struct DBOptions

pub struct DBOptions { /* private fields */ }

This structure represents options that can be used when constructing a LevelDB instance.

Implementations

impl DBOptions

pub fn new() -> Option<DBOptions>

Create and return a new DBOptions instance. Returns None if the underlying library call returns a null pointer.

pub fn set_comparator(&mut self, cmp: DBComparator) -> &mut DBOptions

Set the comparator to use for this database. By default, LevelDB uses a comparator does a lexicographic comparison. Note also that a comparator must be thread-safe.

pub fn set_create_if_missing(&mut self, val: bool) -> &mut DBOptions

Create the database if it’s missing when we try to open it.

Default: false

pub fn set_error_if_exists(&mut self, val: bool) -> &mut DBOptions

Return an error if the database already exists.

Default: false

pub fn set_paranoid_checks(&mut self, val: bool) -> &mut DBOptions

If set to true, the library will do aggressive checking of all data that it is processing and will stop early if it detects any errors.

Default: false

pub fn set_write_buffer_size(&mut self, val: usize) -> &mut DBOptions

Amount of data to build up in memory (backed by an unsorted log on-disk) before converting to a sorted on-disk file.

Default: 4MiB

pub fn set_max_open_files(&mut self, val: isize) -> &mut DBOptions

Number of open files that can be used by the DB. This value should be approximately one open file per 2MB of working set.

Default: 1000

pub fn set_block_size(&mut self, val: usize) -> &mut DBOptions

Approximate size of user data packed per block. Note that this corresponds to uncompressed data.

Default: 4KB

pub fn set_block_restart_interval(&mut self, val: isize) -> &mut DBOptions

Number of keys between restart points for delta encoding of keys. Most clients should not change this parameter.

Default: 16

Trait Implementations

impl Drop for DBOptions

fn drop(&mut self)

Executes the destructor for this type.