Enum SyncPhase 

pub enum SyncPhase {
    FullSyncStart,
    FullSyncEnd,
    SnapshotProgress,
    SnapshotHandoff,
    CatchUpProgress,
}

Represents different phases of the synchronization process.

Checkpoints are emitted at specific phases during sync operations to enable:

• Resumable synchronization (start from last known position)
• Incremental sync coordination (use t1/t2 checkpoints)

Variants

FullSyncStart

Checkpoint emitted before full sync begins (t1).

This checkpoint captures the database state at the moment before data migration starts. It is used to:

• Resume incremental sync from this point
• Replay changes that occurred during full sync

FullSyncEnd

Checkpoint emitted after full sync completes (t2).

This checkpoint captures the database state at the moment after data migration completes. It marks the point where incremental sync should stop replaying and switch to live mode.

SnapshotProgress

Checkpoint emitted per chunk while a watermark snapshot is in progress.

This captures the current stream position together with per-table progress (the last primary key copied and whether the table is done), enabling a snapshot to resume mid-way after a crash without re-copying already-copied chunks.

SnapshotHandoff

Checkpoint emitted when a watermark snapshot completes.

This records the final stream position the snapshot reached. Downstream incremental/live processing continues from exactly this position.

CatchUpProgress

Catch-up progress for binlog sync: stream position plus table coverage.

Updated during incremental sync (position only) and when snapshot batches complete (position plus covered tables). [FullSyncEnd] remains the immutable t2 boundary written once at snapshot handoff completion.

Implementations

impl SyncPhase

pub fn as_str(&self) -> &str

Get the string representation of this phase.

Used for:

• Checkpoint file naming (e.g., checkpoint_full_sync_start_2024-01-01.json)
• Logging and debugging output

Trait Implementations

impl Clone for SyncPhase

fn clone(&self) -> SyncPhase

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SyncPhase

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SyncPhase

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for SyncPhase

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

Formats the value using the given formatter.

impl Eq for SyncPhase

impl Hash for SyncPhase

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SyncPhase

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SyncPhase

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 SyncPhase