Enum MigrationStrategy 

pub enum MigrationStrategy {
    AtomicReplace,
    DualWriteThenCutover,
}

How files are replaced during migration.

Variants

AtomicReplace

Write new files file-by-file, replacing each old file as it completes. Lower peak storage. During migration, some shards have old column, others new.

DualWriteThenCutover

Write all new files first (old files untouched), then commit a single Replace snapshot swapping all old files for new ones atomically. Higher peak storage (2× during migration), but reads always see a consistent view.

Trait Implementations

impl Clone for MigrationStrategy

fn clone(&self) -> MigrationStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MigrationStrategy

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

Formats the value using the given formatter.

impl Eq for MigrationStrategy

impl PartialEq for MigrationStrategy

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for MigrationStrategy