Update weed/topology/node.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/topology/node.go

@@ -95,13 +95,14 @@ func (cr *CapacityReservations) tryReserveAtomic(diskType types.DiskType, count
 
 	if availableSpace >= count {
 		// Create and add reservation atomically
-		reservationId = fmt.Sprintf("%s-%d-%d-%d", diskType, count, time.Now().UnixNano(), rand.Int64())
-		cr.reservations[reservationId] = &CapacityReservation{
-			reservationId: reservationId,
-			diskType:      diskType,
-			count:         count,
-			createdAt:     time.Now(),
-		}
+ 		now := time.Now()
+ 		reservationId = fmt.Sprintf("%s-%d-%d-%d", diskType, count, now.UnixNano(), rand.Int64())
+ 		cr.reservations[reservationId] = &CapacityReservation{
+ 			reservationId: reservationId,
+ 			diskType:      diskType,
+ 			count:         count,
+ 			createdAt:     now,
+ 		}
 		cr.reservedCounts[diskType] += count
 		return reservationId, true
 	}