Save key time point for ccr job progress

pkg/ccr/job_progress.go

@@ -142,6 +142,12 @@ type JobProgress struct {
 	TableCommitSeqMap map[int64]int64 `json:"table_commit_seq_map"` // only for DBTablesIncrementalSync
 	InMemoryData      any             `json:"-"`
 	PersistData       string          `json:"data"` // this often for binlog or snapshot info
+
+	// Some fields to save the unix epoch time of the key timepoint.
+	CreatedAt              int64 `json:"created_at,omitempty"`
+	FullSyncStartAt        int64 `json:"full_sync_start_at,omitempty"`
+	IncrementalSyncStartAt int64 `json:"incremental_sync_start_at,omitempty"`
+	IngestBinlogAt         int64 `json:"ingest_binlog_at,omitempty"`
 }
 
 func (j *JobProgress) String() string {
@@ -168,6 +174,11 @@ func NewJobProgress(jobName string, syncType SyncType, db storage.DB) *JobProgre
 		TableCommitSeqMap: nil,
 		InMemoryData:      nil,
 		PersistData:       "",
+
+		CreatedAt:              time.Now().Unix(),
+		FullSyncStartAt:        0,
+		IncrementalSyncStartAt: 0,
+		IngestBinlogAt:         0,
 	}
 }
 
@@ -232,6 +243,10 @@ func _convertToPersistData(persistData any) string {
 
 // Persist is checkpint, next state only get it from persistData
 func (j *JobProgress) NextSubCheckpoint(subSyncState SubSyncState, persistData any) {
+	if subSyncState == IngestBinlog {
+		j.IngestBinlogAt = time.Now().Unix()
+	}
+
 	j.SubSyncState = subSyncState
 
 	j.PersistData = _convertToPersistData(persistData)
@@ -251,6 +266,15 @@ func (j *JobProgress) CommitNextSubWithPersist(commitSeq int64, subSyncState Sub
 }
 
 func (j *JobProgress) NextWithPersist(commitSeq int64, syncState SyncState, subSyncState SubSyncState, persistData string) {
+	if subSyncState == BeginCreateSnapshot && (syncState == TableFullSync || syncState == DBFullSync) {
+		j.FullSyncStartAt = time.Now().Unix()
+		j.IncrementalSyncStartAt = 0
+		j.IngestBinlogAt = 0
+	} else if subSyncState == Done && (syncState == TableIncrementalSync || syncState == TableIncrementalSync) {
+		j.IncrementalSyncStartAt = time.Now().Unix()
+		j.IngestBinlogAt = 0
+	}
+
 	j.CommitSeq = commitSeq
 	j.SyncState = syncState
 	j.SubSyncState = subSyncState