Package org.apache.hadoop.ozone.container.common.volume

Class DbVolume

java.lang.Object

org.apache.hadoop.ozone.container.common.volume.StorageVolume

org.apache.hadoop.ozone.container.common.volume.DbVolume

All Implemented Interfaces:

org.apache.hadoop.hdfs.server.datanode.checker.Checkable<Boolean,org.apache.hadoop.hdfs.server.datanode.checker.VolumeCheckResult>

public class DbVolume
extends StorageVolume

DbVolume represents a volume in datanode holding db instances for multiple HddsVolumes. One HddsVolume will have one subdirectory for its db instance under a DbVolume. For example: Say we have an SSD device mounted at /ssd1, then the DbVolume root directory is /ssd1/db, and we have a subdirectory for db instance like /ssd1/db///container.db.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DbVolume.Builder	Builder class for DbVolume.

Nested classes/interfaces inherited from class org.apache.hadoop.ozone.container.common.volume.StorageVolume

StorageVolume.VolumeState, StorageVolume.VolumeType

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DB_VOLUME_DIR

Fields inherited from class org.apache.hadoop.ozone.container.common.volume.StorageVolume

TMP_DIR_NAME, TMP_DISK_CHECK_DIR_NAME

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DbVolume(DbVolume.Builder b)

Method Summary

Modifier and Type	Method	Description
void	addHddsDbStorePath(String id, String dbPath)
void	failVolume()
Set<String>	getHddsVolumeIDs()
protected void	initializeImpl()
void	shutdown()

Methods inherited from class org.apache.hadoop.ozone.container.common.volume.StorageVolume

check, containerUsedSpace, createTmpDirs, createTmpSubdirIfNeeded, createWorkingDir, decrementUsedSpace, equals, format, getClusterID, getConf, getContainerDirsPath, getCTime, getCurrentUsage, getDatanodeConfig, getDatanodeUuid, getDiskCheckDir, getLayoutVersion, getReport, getStorageDir, getStorageID, getStorageState, getStorageType, getTmpDir, getVolumeRootDir, getVolumeSet, getVolumeUsage, getWorkingDirName, hashCode, incrementUsedSpace, initialize, isFailed, refreshVolumeUsage, reportBuilder, setGatherContainerUsages, setState, start, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

DB_VOLUME_DIR

public static final String DB_VOLUME_DIR

See Also:

• Constant Field Values

Constructor Details

DbVolume

protected DbVolume(DbVolume.Builder b)
            throws IOException

Throws:

IOException

Method Details

initializeImpl

protected void initializeImpl()
                       throws IOException

Overrides:

initializeImpl in class StorageVolume

Throws:

IOException

failVolume

public void failVolume()

Overrides:

failVolume in class StorageVolume

shutdown

public void shutdown()

Overrides:

shutdown in class StorageVolume

addHddsDbStorePath

public void addHddsDbStorePath(String id,
 String dbPath)

getHddsVolumeIDs

public Set<String> getHddsVolumeIDs()