Struct rocksdb::ReadOptions

pub struct ReadOptions { /* fields omitted */ }

Methods

impl ReadOptions

pub unsafe fn set_iterate_upper_bound<K: AsRef<[u8]>>(&mut self, key: K)

Set the upper bound for an iterator. The upper bound itself is not included on the iteration result.

Safety

This function will store a clone of key and will give a raw pointer of it to the underlying C++ API, therefore, when given to any other DB method you must ensure that this ReadOptions value does not leave the scope too early (e.g. DB::iterator_cf_opt).

pub fn set_prefix_same_as_start(&mut self, v: bool)

pub fn set_total_order_seek(&mut self, v: bool)

pub fn set_verify_checksums(&mut self, v: bool)

If true, all data read from underlying storage will be verified against corresponding checksums.

Default: true

pub fn set_readahead_size(&mut self, v: usize)

If non-zero, an iterator will create a new table reader which performs reads of the given size. Using a large size (> 2MB) can improve the performance of forward iteration on spinning disks. Default: 0

use rocksdb::{ReadOptions};

let mut opts = ReadOptions::default();
opts.set_readahead_size(4_194_304); // 4mb

pub fn set_tailing(&mut self, v: bool)

If true, create a tailing iterator. Note that tailing iterators only support moving in the forward direction. Iterating in reverse or seek_to_last are not supported.

Trait Implementations

impl Send for ReadOptions

impl Sync for ReadOptions

impl Drop for ReadOptions

fn drop(&mut self)

Executes the destructor for this type.

impl Default for ReadOptions

fn default() -> ReadOptions

Returns the "default value" for a type.