Use humanize constants for KiB, MiB and GiB units. (#3322)

cmd/object-common.go

@@ -22,14 +22,16 @@ import (
 	"runtime"
 	"strings"
 	"sync"
+
+	humanize "github.com/dustin/go-humanize"
 )
 
 const (
 	// Block size used for all internal operations version 1.
-	blockSizeV1 = 10 * 1024 * 1024 // 10MiB.
+	blockSizeV1 = 10 * humanize.MiByte
 
 	// Staging buffer read size for all internal operations version 1.
-	readSizeV1 = 1 * 1024 * 1024 // 1MiB.
+	readSizeV1 = 1 * humanize.MiByte
 
 	// Buckets meta prefix.
 	bucketMetaPrefix = "buckets"