c := minio.Core{Client: globalMinioClient}
	for i := 0; i < opts.concurrency; i++ {
		go func(i int) {
			defer wg.Done()
			var j uint64
			if objCountPerThread[i] == 0 {
				return
			}
			for {
				if objCountPerThread[i] == j {
					j = 0
				}
				tmpObjName := pathJoin(objNamePrefix, fmt.Sprintf("%d/%d", i, j))
				t := time.Now()