Package org.apache.hadoop.ozone.container.metadata

package org.apache.hadoop.ozone.container.metadata

This package contains classes that define the structure of the datanode's database, and allow reading and writing to it.

Class	Description
AbstractDatanodeDBDefinition	This class serves as an intermediate format for all possible database layouts for datanodes.
AbstractDatanodeStore	Implementation of the DatanodeStore interface that contains functionality common to all more derived datanode store implementations.
AbstractDatanodeStore.KeyValueBlockIterator	Block Iterator for KeyValue Container.
AbstractDatanodeStore.KeyValueBlockLocalIdIterator	Block localId Iterator for KeyValue Container.
AbstractRDBStore<DEF extends org.apache.hadoop.hdds.utils.db.DBDefinition>	Abstract Interface defining the way to interact with any rocksDB in the datanode.
ContainerCreateInfo	ContainerCreateInfo is a class that holds information about the state and other information on creation This class is immutable.
DatanodeSchemaOneDBDefinition	This class allows support of the schema version one RocksDB layout for datanode, where all data is kept in the same default table.
DatanodeSchemaThreeDBDefinition	This class defines the RocksDB structure for datanode following schema version 3, where the block data, metadata, and transactions which are to be deleted are put in their own separate column families and with containerID as key prefix.
DatanodeSchemaTwoDBDefinition	This class defines the RocksDB structure for datanodes following schema version 2, where the block data, metadata, and transactions which are to be deleted are put in their own separate column families.
DatanodeStore	Interface for interacting with datanode databases.
DatanodeStoreSchemaOneImpl	Constructs a datanode store in accordance with schema version 1, which places all data in the default column family.
DatanodeStoreSchemaThreeImpl	Constructs a datanode store in accordance with schema version 3, which uses three column families/tables: 1.
DatanodeStoreSchemaTwoImpl	Constructs a datanode store in accordance with schema version 2, which uses three column families/tables: 1.
DatanodeStoreWithIncrementalChunkList	Constructs a datanode store in accordance with schema version 2, which uses three column families/tables: 1.
DatanodeTable<KEY,VALUE>	Wrapper class to represent a table in a datanode RocksDB instance.
DBStoreManager	Interface for interacting with datanode databases.
DeleteTransactionStore<TXN_KEY>	Store interface for DeleteTransaction table.
SchemaOneChunkInfoListCodec	Codec for parsing ContainerProtos.ChunkInfoList objects from data that may have been written using schema version one.
SchemaOneDeletedBlocksTable	For RocksDB instances written using DB schema version 1, all data is stored in the default column family.
SchemaOneKeyCodec	Containers written using schema version 1 wrote unprefixed block ID keys as longs, and metadata or prefixed block IDs as Strings.
WitnessedContainerDBDefinition	Class for defining the schema for master volume in a datanode.
WitnessedContainerMetadataStore	Interface for interacting with database in the master volume of a datanode.
WitnessedContainerMetadataStoreImpl	Class for interacting with database in the master volume of a datanode.
WitnessedContainerMetadataStoreImpl.PreviousVersionTables	this will hold old version tables required during upgrade, and these are initialized based on version only.