Enum mongo_driver::read_prefs::ReadMode

pub enum ReadMode {
    Primary,
    Secondary,
    PrimaryPreferred,
    SecondaryPreferred,
    Nearest,
}

Describes how reads should be dispatched.

Variants

Primary

Default mode. All operations read from the current replica set primary.

Secondary

All operations read from among the nearest secondary members of the replica set.

PrimaryPreferred

In most situations, operations read from the primary but if it is unavailable, operations read from secondary members.

SecondaryPreferred

In most situations, operations read from among the nearest secondary members, but if no secondaries are available, operations read from the primary.

Nearest

Operations read from among the nearest members of the replica set, irrespective of the member’s type.

Trait Implementations