Enum PgMode 

pub enum PgMode {
    ReadWrite,
    ReadOnly,
    Fenced(i64),
    Shared,
}

How a PgStore may write. Single-node servers use ReadWrite; the cluster mode (orbit server --cluster, see crate::cluster) gives a standby a ReadOnly store and the leader a Fenced one.

Variants

ReadWrite

ReadOnly

Reads only: writes fail and no execution counts as active, so an engine opened on it recovers nothing and never appends.

Fenced(i64)

Every history append verifies, in its own transaction, that the cluster term is still this one, so a deposed leader cannot write.

Shared

Shared mode (--cluster-mode shared, see crate::shared): every node writes, but only to the executions it owns. Appends go through PgStore::append_shared, which checks the execution’s ownership epoch; no execution counts as active at open, because a node loads the executions it owns or takes over explicitly.

Trait Implementations

impl Clone for PgMode

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PgMode

impl Debug for PgMode

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

Formats the value using the given formatter.

impl Eq for PgMode

impl PartialEq for PgMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PgMode