jobCancelers map[string]context.CancelFunc
	workerKillCh chan struct{}
	workerSize   int
}

var globalBatchJobPool *BatchJobPool

// newBatchJobPool creates a pool of job manifest workers of specified size
func newBatchJobPool(ctx context.Context, o ObjectLayer, workers int) *BatchJobPool {
	jpool := &BatchJobPool{
		ctx:          ctx,
		objLayer:     o,