Enum rocks::options::ReadTier

#[repr(C)]pub enum ReadTier {
    ReadAllTier,
    BlockCacheTier,
    PersistedTier,
}

An application can issue a read request (via Get/Iterators) and specify if that read should process data that ALREADY resides on a specified cache level. For example, if an application specifies kBlockCacheTier then the Get call will process data that is already processed in the memtable or the block cache. It will not page in data from the OS cache or data that resides in storage.

Variants

ReadAllTier

data in memtable, block cache, OS cache or storage

BlockCacheTier

data in memtable or block cache

PersistedTier

persisted data. When WAL is disabled, this option will skip data in memtable. Note that this ReadTier currently only supports Get and MultiGet and does not support iterators.

Trait Implementations

impl Clone for ReadTier

fn clone(&self) -> ReadTier

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ReadTier

impl Debug for ReadTier

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

Formats the value using the given formatter.

impl Eq for ReadTier

impl Hash for ReadTier

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl PartialEq<ReadTier> for ReadTier

fn eq(&self, other: &ReadTier) -> bool

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

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl StructuralEq for ReadTier

impl StructuralPartialEq for ReadTier