Skip volume data integrity check for volume which has remote file (se…

…aweedfs#5976)

weed/storage/volume_loading.go

@@ -123,9 +123,17 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
 				return fmt.Errorf("cannot write Volume Index %s: %v", v.FileName(".idx"), err)
 			}
 		}
-		if v.lastAppendAtNs, err = CheckAndFixVolumeDataIntegrity(v, indexFile); err != nil {
-			v.noWriteOrDelete = true
-			glog.V(0).Infof("volumeDataIntegrityChecking failed %v", err)
+		// Do not need to check the data integrity for remote volumes,
+		// since the remote storage tier may have larger capacity, the volume
+		// data read will trigger the ReadAt() function to read from the remote
+		// storage tier, and download to local storage, which may cause the
+		// capactiy overloading.
+		if !v.HasRemoteFile() {
+			glog.V(0).Infof("checking volume data integrity for volume %d", v.Id)
+			if v.lastAppendAtNs, err = CheckAndFixVolumeDataIntegrity(v, indexFile); err != nil {
+				v.noWriteOrDelete = true
+				glog.V(0).Infof("volumeDataIntegrityChecking failed %v", err)
+			}
 		}
 
 		if v.noWriteOrDelete || v.noWriteCanDelete {