alluxio.worker.block.meta

Interface StorageTier

All Known Implementing Classes:

DefaultStorageTier

public interface StorageTier

Represents a tier of storage, for example memory or SSD. It serves as a container of StorageDir which actually contains metadata information about blocks stored and space used/available.

Method Summary

Modifier and Type	Method and Description
long	getAvailableBytes()
long	getCapacityBytes()
StorageDir	getDir(int dirIndex) Returns a directory for the given index.
List<String>	getLostStorage()
List<StorageDir>	getStorageDirs()
String	getTierAlias()
int	getTierOrdinal()
void	removeStorageDir(StorageDir dir) Removes a directory.

Method Detail

getTierOrdinal

int getTierOrdinal()

Returns:

the tier ordinal

getTierAlias

String getTierAlias()

Returns:

the tier alias

getCapacityBytes

long getCapacityBytes()

Returns:

the capacity (in bytes)

getAvailableBytes

long getAvailableBytes()

Returns:

the remaining capacity (in bytes)

getDir

@Nullable
StorageDir getDir(int dirIndex)

Returns a directory for the given index.

Parameters:

dirIndex - the directory index

Returns:

a directory, or null if the directory does not exist

getStorageDirs

List<StorageDir> getStorageDirs()

Returns:

a list of directories in this tier

getLostStorage

List<String> getLostStorage()

Returns:

a list of lost storage paths

removeStorageDir

void removeStorageDir(StorageDir dir)

Removes a directory.

Parameters:

dir - directory to be removed