Enum OccValidationPolicy 

pub enum OccValidationPolicy {
    ValidateSerial = 0,
    ValidateParallel = 1,
}

How an OptimisticTransactionDB checks a transaction for write conflicts at commit.

Variants

ValidateSerial = 0

Validate serially at commit, after the transaction has entered the write group.

Validation is single threaded because the write group is. Simple, but it can suffer from high mutex contention. See https://github.com/facebook/rocksdb/issues/4402.

ValidateParallel = 1

Validate in parallel before the transaction enters the write group.

Each transaction takes locks for its write set in a well defined order, off the write group, which cuts the mutex contention. This is the default. The locks come from the pool sized by OptimisticTransactionDBOptions::set_occ_lock_buckets or supplied by OptimisticTransactionDBOptions::set_shared_lock_buckets.

Trait Implementations

impl Clone for OccValidationPolicy

fn clone(&self) -> OccValidationPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OccValidationPolicy

impl Debug for OccValidationPolicy

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for OccValidationPolicy

Available on crate feature serde1 only.

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for OccValidationPolicy

impl PartialEq for OccValidationPolicy

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

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for OccValidationPolicy

Available on crate feature serde1 only.

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for OccValidationPolicy