Struct rocksdb::Env

pub struct Env(_);

An Env is an interface used by the rocksdb implementation to access operating system functionality like the filesystem etc. Callers may wish to provide a custom Env object when opening a database to get fine gain control; e.g., to rate limit file system operations.

All Env implementations are safe for concurrent access from multiple threads without any external synchronization.

Note: currently, C API behinds C++ API for various settings. See also: rocksdb/include/env.h

Implementations

impl Env

pub fn default() -> Result<Env, Error>

Returns default env

pub fn mem_env() -> Result<Env, Error>

Returns a new environment that stores its data in memory and delegates all non-file-storage tasks to base_env.

pub fn set_background_threads(&mut self, num_threads: c_int)

Sets the number of background worker threads of a specific thread pool for this environment. LOW is the default pool.

Default: 1

pub fn set_high_priority_background_threads(&mut self, n: c_int)

Sets the size of the high priority thread pool that can be used to prevent compactions from stalling memtable flushes.

pub fn set_low_priority_background_threads(&mut self, n: c_int)

Sets the size of the low priority thread pool that can be used to prevent compactions from stalling memtable flushes.

pub fn set_bottom_priority_background_threads(&mut self, n: c_int)

Sets the size of the bottom priority thread pool that can be used to prevent compactions from stalling memtable flushes.

pub fn join_all_threads(&mut self)

Wait for all threads started by StartThread to terminate.

pub fn lower_thread_pool_io_priority(&mut self)

Lowering IO priority for threads from the specified pool.

pub fn lower_high_priority_thread_pool_io_priority(&mut self)

Lowering IO priority for high priority thread pool.

pub fn lower_thread_pool_cpu_priority(&mut self)

Lowering CPU priority for threads from the specified pool.

pub fn lower_high_priority_thread_pool_cpu_priority(&mut self)

Lowering CPU priority for high priority thread pool.