Package org.apache.hadoop.hdfs.server.namenode

@Public @Unstable package org.apache.hadoop.hdfs.server.namenode

Related Packages

Package	Description
org.apache.hadoop.hdfs.server.namenode.fgl	Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.
org.apache.hadoop.hdfs.server.namenode.ha
org.apache.hadoop.hdfs.server.namenode.metrics
org.apache.hadoop.hdfs.server.namenode.snapshot
org.apache.hadoop.hdfs.server.namenode.top
org.apache.hadoop.hdfs.server.namenode.visitor	Use the visitor pattern to visit namespace tree.

Class	Description
AclEntryStatusFormat	Class to pack an AclEntry into an integer.
org.apache.hadoop.hdfs.server.namenode.AclFeature	Feature that represents the ACLs of the inode.
org.apache.hadoop.hdfs.server.namenode.AclStorage	AclStorage contains utility methods that define how ACL data is stored in the namespace.
AuditLogger	Interface defining an audit logger.
org.apache.hadoop.hdfs.server.namenode.BackupImage	Extension of FSImage for the backup node.
org.apache.hadoop.hdfs.server.namenode.BackupNode	BackupNode.
org.apache.hadoop.hdfs.server.namenode.BackupState
BlockResolver	Given an external reference, create a sequence of blocks and associated metadata.
org.apache.hadoop.hdfs.server.namenode.CachedBlock	Represents a cached block.
org.apache.hadoop.hdfs.server.namenode.CacheManager	The Cache Manager handles caching on DataNodes.
org.apache.hadoop.hdfs.server.namenode.CacheManager.PersistState
org.apache.hadoop.hdfs.server.namenode.CachePool	A CachePool describes a set of cache resources being managed by the NameNode.
org.apache.hadoop.hdfs.server.namenode.CachePool.DirectiveList
org.apache.hadoop.hdfs.server.namenode.CheckpointConf
org.apache.hadoop.hdfs.server.namenode.CheckpointFaultInjector	Utility class to faciliate some fault injection tests for the checkpointing process.
org.apache.hadoop.hdfs.server.namenode.CheckpointSignature	A unique signature intended to identify checkpoint transactions.
Content	The content types such as file, directory and symlink to be computed.
org.apache.hadoop.hdfs.server.namenode.ContentCounts	The counter to be computed for content types such as file, directory and symlink, and the storage type usage such as SSD, DISK, ARCHIVE.
org.apache.hadoop.hdfs.server.namenode.ContentCounts.Builder
org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext
DefaultAuditLogger	This class provides an interface for Namenode and Router to Audit events information.
org.apache.hadoop.hdfs.server.namenode.DefaultINodeAttributesProvider	A default implementation of the INodeAttributesProvider
org.apache.hadoop.hdfs.server.namenode.DfsServlet	A base class for the servlets in DFS.
org.apache.hadoop.hdfs.server.namenode.DirectoryWithQuotaFeature	Quota feature for INodeDirectory.
org.apache.hadoop.hdfs.server.namenode.DirectoryWithQuotaFeature.Builder
org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream	An implementation of the abstract class EditLogInputStream, which reads edits from a file.
org.apache.hadoop.hdfs.server.namenode.EditLogFileOutputStream	An implementation of the abstract class EditLogOutputStream, which stores edits in a local file.
org.apache.hadoop.hdfs.server.namenode.EditLogInputException	Thrown when there's a failure to read an edit log op from disk when loading edits.
org.apache.hadoop.hdfs.server.namenode.EditLogInputStream	A generic abstract class to support reading edits log data from persistent storage.
org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream	A generic abstract class to support journaling of edits logs into a persistent storage.
org.apache.hadoop.hdfs.server.namenode.EditsDoubleBuffer	A double-buffer for edits.
org.apache.hadoop.hdfs.server.namenode.EncryptionFaultInjector	Used to inject certain faults for testing.
org.apache.hadoop.hdfs.server.namenode.EncryptionZoneManager	Manages the list of encryption zones in the filesystem.
org.apache.hadoop.hdfs.server.namenode.ErasureCodingPolicyManager	This manages erasure coding policies predefined and activated in the system.
org.apache.hadoop.hdfs.server.namenode.FileJournalManager	Journal manager for the common case of edits files being written to a storage directory.
org.apache.hadoop.hdfs.server.namenode.FileJournalManager.EditLogFile	Record of an edit log that has been located and had its filename parsed.
FileSystemImage	Create FSImage from an external namespace.
org.apache.hadoop.hdfs.server.namenode.FileUnderConstructionFeature	Feature for under-construction file.
FixedBlockMultiReplicaResolver	Resolver mapping all files to a configurable, uniform blocksize and replication.
FixedBlockResolver	Resolver mapping all files to a configurable, uniform blocksize.
org.apache.hadoop.hdfs.server.namenode.FsckServlet	This class is used in Namesystem's web server to do fsck on namenode.
org.apache.hadoop.hdfs.server.namenode.FSDirAttrOp
org.apache.hadoop.hdfs.server.namenode.FSDirectory	Both FSDirectory and FSNamesystem manage the state of the namespace.
FSDirectory.DirOp
org.apache.hadoop.hdfs.server.namenode.FSDirXAttrOp
org.apache.hadoop.hdfs.server.namenode.FSEditLog	FSEditLog maintains a log of the namespace modifications.
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.PositionTrackingInputStream	Stream wrapper that keeps track of the current stream position.
org.apache.hadoop.hdfs.server.namenode.FSEditLogOp	Helper classes for reading the ops from an InputStream.
org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.OpInstanceCache
org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.Reader	Class for reading editlog ops from a stream
org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.Writer	Class for writing editlog ops
org.apache.hadoop.hdfs.server.namenode.FSEditLogOpCodes	Op codes for edits file
org.apache.hadoop.hdfs.server.namenode.FSImage	FSImage handles checkpointing and logging of the namespace edits.
org.apache.hadoop.hdfs.server.namenode.FSImageCompression	Simple container class that handles support for compressed fsimage files.
org.apache.hadoop.hdfs.server.namenode.FSImageFormat	Contains inner classes for reading or writing the on-disk format for FSImages.
org.apache.hadoop.hdfs.server.namenode.FSImageFormat.Loader	A one-shot class responsible for loading an image.
org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode
org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode.Loader
org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode.Saver
org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf	Utility class to read / write fsimage in protobuf format.
org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf.Loader
org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf.LoaderContext
org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf.Saver
org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf.SaverContext
org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf.SaverContext.DeduplicationMap<E>
FSImageFormatProtobuf.SectionName	Supported section name.
org.apache.hadoop.hdfs.server.namenode.FsImageProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.CacheManagerSection	Protobuf type hadoop.hdfs.fsimage.CacheManagerSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.CacheManagerSection.Builder	Protobuf type hadoop.hdfs.fsimage.CacheManagerSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.CacheManagerSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.ErasureCodingSection	Protobuf type hadoop.hdfs.fsimage.ErasureCodingSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.ErasureCodingSection.Builder	Protobuf type hadoop.hdfs.fsimage.ErasureCodingSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.ErasureCodingSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummary	Protobuf type hadoop.hdfs.fsimage.FileSummary
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummary.Builder	Protobuf type hadoop.hdfs.fsimage.FileSummary
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummary.Section	index for each section
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummary.Section.Builder	index for each section
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummary.SectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FileSummaryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FilesUnderConstructionSection	This section records information about under-construction files for reconstructing the lease map.
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FilesUnderConstructionSection.Builder	This section records information about under-construction files for reconstructing the lease map.
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FilesUnderConstructionSection.FileUnderConstructionEntry	Protobuf type hadoop.hdfs.fsimage.FilesUnderConstructionSection.FileUnderConstructionEntry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FilesUnderConstructionSection.FileUnderConstructionEntry.Builder	Protobuf type hadoop.hdfs.fsimage.FilesUnderConstructionSection.FileUnderConstructionEntry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FilesUnderConstructionSection.FileUnderConstructionEntryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.FilesUnderConstructionSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeDirectorySection	This section records the children of each directories NAME: INODE_DIR
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeDirectorySection.Builder	This section records the children of each directories NAME: INODE_DIR
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeDirectorySection.DirEntry	A single DirEntry needs to fit in the default PB max message size of 64MB.
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeDirectorySection.DirEntry.Builder	A single DirEntry needs to fit in the default PB max message size of 64MB.
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeDirectorySection.DirEntryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeDirectorySectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeReferenceSection	Protobuf type hadoop.hdfs.fsimage.INodeReferenceSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeReferenceSection.Builder	Protobuf type hadoop.hdfs.fsimage.INodeReferenceSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeReferenceSection.INodeReference	Protobuf type hadoop.hdfs.fsimage.INodeReferenceSection.INodeReference
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeReferenceSection.INodeReference.Builder	Protobuf type hadoop.hdfs.fsimage.INodeReferenceSection.INodeReference
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeReferenceSection.INodeReferenceOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeReferenceSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection	Permission is serialized as a 64-bit long. [0:24):[25:48):[48:64) (in Big Endian).
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.AclFeatureProto	Protobuf type hadoop.hdfs.fsimage.INodeSection.AclFeatureProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.AclFeatureProto.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.AclFeatureProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.AclFeatureProtoOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.Builder	Permission is serialized as a 64-bit long. [0:24):[25:48):[48:64) (in Big Endian).
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.FileUnderConstructionFeature	under-construction feature for INodeFile
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.FileUnderConstructionFeature.Builder	under-construction feature for INodeFile
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.FileUnderConstructionFeatureOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INode	Protobuf type hadoop.hdfs.fsimage.INodeSection.INode
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INode.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.INode
FsImageProto.INodeSection.INode.Type	Protobuf enum hadoop.hdfs.fsimage.INodeSection.INode.Type
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeDirectory	Protobuf type hadoop.hdfs.fsimage.INodeSection.INodeDirectory
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeDirectory.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.INodeDirectory
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeDirectoryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeFile	Protobuf type hadoop.hdfs.fsimage.INodeSection.INodeFile
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeFile.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.INodeFile
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeFileOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeSymlink	Protobuf type hadoop.hdfs.fsimage.INodeSection.INodeSymlink
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeSymlink.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.INodeSymlink
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.INodeSymlinkOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.QuotaByStorageTypeEntryProto	Protobuf type hadoop.hdfs.fsimage.INodeSection.QuotaByStorageTypeEntryProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.QuotaByStorageTypeEntryProto.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.QuotaByStorageTypeEntryProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.QuotaByStorageTypeEntryProtoOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.QuotaByStorageTypeFeatureProto	Protobuf type hadoop.hdfs.fsimage.INodeSection.QuotaByStorageTypeFeatureProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.QuotaByStorageTypeFeatureProto.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.QuotaByStorageTypeFeatureProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.QuotaByStorageTypeFeatureProtoOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.XAttrCompactProto	Protobuf type hadoop.hdfs.fsimage.INodeSection.XAttrCompactProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.XAttrCompactProto.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.XAttrCompactProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.XAttrCompactProtoOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.XAttrFeatureProto	Protobuf type hadoop.hdfs.fsimage.INodeSection.XAttrFeatureProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.XAttrFeatureProto.Builder	Protobuf type hadoop.hdfs.fsimage.INodeSection.XAttrFeatureProto
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSection.XAttrFeatureProtoOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.INodeSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.NameSystemSection	Name: NS_INFO
org.apache.hadoop.hdfs.server.namenode.FsImageProto.NameSystemSection.Builder	Name: NS_INFO
org.apache.hadoop.hdfs.server.namenode.FsImageProto.NameSystemSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection	Protobuf type hadoop.hdfs.fsimage.SecretManagerSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.Builder	Protobuf type hadoop.hdfs.fsimage.SecretManagerSection
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.DelegationKey	Protobuf type hadoop.hdfs.fsimage.SecretManagerSection.DelegationKey
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.DelegationKey.Builder	Protobuf type hadoop.hdfs.fsimage.SecretManagerSection.DelegationKey
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.DelegationKeyOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.PersistToken	Protobuf type hadoop.hdfs.fsimage.SecretManagerSection.PersistToken
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.PersistToken.Builder	Protobuf type hadoop.hdfs.fsimage.SecretManagerSection.PersistToken
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSection.PersistTokenOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SecretManagerSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection	This section records information about snapshot diffs NAME: SNAPSHOT_DIFF
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.Builder	This section records information about snapshot diffs NAME: SNAPSHOT_DIFF
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.CreatedListEntry	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.CreatedListEntry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.CreatedListEntry.Builder	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.CreatedListEntry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.CreatedListEntryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.DiffEntry	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.DiffEntry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.DiffEntry.Builder	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.DiffEntry
FsImageProto.SnapshotDiffSection.DiffEntry.Type	Protobuf enum hadoop.hdfs.fsimage.SnapshotDiffSection.DiffEntry.Type
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.DiffEntryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.DirectoryDiff	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.DirectoryDiff
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.DirectoryDiff.Builder	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.DirectoryDiff
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.DirectoryDiffOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.FileDiff	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.FileDiff
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.FileDiff.Builder	Protobuf type hadoop.hdfs.fsimage.SnapshotDiffSection.FileDiff
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSection.FileDiffOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotDiffSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotSection	This section records the information about snapshot NAME: SNAPSHOT
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotSection.Builder	This section records the information about snapshot NAME: SNAPSHOT
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotSection.Snapshot	Protobuf type hadoop.hdfs.fsimage.SnapshotSection.Snapshot
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotSection.Snapshot.Builder	Protobuf type hadoop.hdfs.fsimage.SnapshotSection.Snapshot
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotSection.SnapshotOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.SnapshotSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.StringTableSection	This section maps string to id NAME: STRING_TABLE
org.apache.hadoop.hdfs.server.namenode.FsImageProto.StringTableSection.Builder	This section maps string to id NAME: STRING_TABLE
org.apache.hadoop.hdfs.server.namenode.FsImageProto.StringTableSection.Entry	Protobuf type hadoop.hdfs.fsimage.StringTableSection.Entry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.StringTableSection.Entry.Builder	Protobuf type hadoop.hdfs.fsimage.StringTableSection.Entry
org.apache.hadoop.hdfs.server.namenode.FsImageProto.StringTableSection.EntryOrBuilder
org.apache.hadoop.hdfs.server.namenode.FsImageProto.StringTableSectionOrBuilder
org.apache.hadoop.hdfs.server.namenode.FSImageSerialization	Static utility functions for serializing various pieces of data in the correct format for the FSImage file.
org.apache.hadoop.hdfs.server.namenode.FSImageUtil
org.apache.hadoop.hdfs.server.namenode.FsImageValidation	For validating FSImage.
org.apache.hadoop.hdfs.server.namenode.FSNamesystem	FSNamesystem is a container of both transient and persisted name-space state, and does all the book-keeping work on a NameNode.
org.apache.hadoop.hdfs.server.namenode.FSNamesystemLock	Mimics a ReentrantReadWriteLock but does not directly implement the interface so more sophisticated locking capabilities and logging/metrics are possible.
org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker	Class that helps in checking file system permission.
org.apache.hadoop.hdfs.server.namenode.FSTreeTraverser	FSTreeTraverser traverse directory recursively and process files in batches.
org.apache.hadoop.hdfs.server.namenode.FSTreeTraverser.TraverseInfo	Class will represent the additional info required for traverse.
FSTreeWalk	Traversal of an external FileSystem.
FsUGIResolver	Dynamically assign ids to users/groups as they appear in the external filesystem.
HdfsAuditLogger	Extension of AuditLogger.
org.apache.hadoop.hdfs.server.namenode.IllegalReservedPathException	Thrown when upgrading from software release that doesn't support reserved path to software release that supports reserved path, and when there is reserved path name in the Fsimage.
org.apache.hadoop.hdfs.server.namenode.ImageServlet	This class is used in Namesystem's jetty to retrieve/upload a file Typically used by the Secondary NameNode to retrieve image and edit file for periodic checkpointing in Non-HA deployments.
org.apache.hadoop.hdfs.server.namenode.ImageWriter	Utility crawling an existing hierarchical FileSystem and emitting a valid FSImage/NN storage.
org.apache.hadoop.hdfs.server.namenode.ImageWriter.Options	Configurable options for image generation mapping pluggable components.
org.apache.hadoop.hdfs.server.namenode.INode	We keep an in-memory representation of the file/block hierarchy.
org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo	Information used for updating the blocksMap when deleting files.
org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo.UpdatedReplicationInfo	The blocks whose replication factor need to be updated.
org.apache.hadoop.hdfs.server.namenode.INode.Feature	INode feature such as FileUnderConstructionFeature and DirectoryWithQuotaFeature.
org.apache.hadoop.hdfs.server.namenode.INode.QuotaDelta	Information used to record quota usage delta.
org.apache.hadoop.hdfs.server.namenode.INode.ReclaimContext	Context object to record blocks and inodes that need to be reclaimed
INodeAttributeProvider
org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AccessControlEnforcer	The AccessControlEnforcer allows implementations to override the default File System permission checking logic enforced on a file system object
org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AuthorizationContext
org.apache.hadoop.hdfs.server.namenode.INodeAttributeProvider.AuthorizationContext.Builder
org.apache.hadoop.hdfs.server.namenode.INodeAttributes	The attributes of an inode.
org.apache.hadoop.hdfs.server.namenode.INodeAttributes.SnapshotCopy	A read-only copy of the inode attributes.
org.apache.hadoop.hdfs.server.namenode.INodeDirectory	Directory INode class.
org.apache.hadoop.hdfs.server.namenode.INodeDirectory.SnapshotAndINode	A pair of Snapshot and INode objects.
org.apache.hadoop.hdfs.server.namenode.INodeDirectoryAttributes	The attributes of an inode.
org.apache.hadoop.hdfs.server.namenode.INodeDirectoryAttributes.CopyWithQuota
org.apache.hadoop.hdfs.server.namenode.INodeDirectoryAttributes.SnapshotCopy	A copy of the inode directory attributes
org.apache.hadoop.hdfs.server.namenode.INodeFile	I-node for closed file.
org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes	The attributes of a file.
org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes.SnapshotCopy	A copy of the inode file attributes
org.apache.hadoop.hdfs.server.namenode.INodeId	An id which uniquely identifies an inode.
org.apache.hadoop.hdfs.server.namenode.INodeMap	Storing all the INodes and maintaining the mapping between INode ID and INode.
org.apache.hadoop.hdfs.server.namenode.INodeReference	A reference to an inode.
org.apache.hadoop.hdfs.server.namenode.INodeReference.DstReference
org.apache.hadoop.hdfs.server.namenode.INodeReference.WithCount	An anonymous reference with reference count.
org.apache.hadoop.hdfs.server.namenode.INodeReference.WithName	A reference with a fixed name.
org.apache.hadoop.hdfs.server.namenode.INodeReferenceValidation	For validating INodeReference subclasses.
org.apache.hadoop.hdfs.server.namenode.INodesInPath	Contains INodes information resolved from a given path.
org.apache.hadoop.hdfs.server.namenode.INodeSymlink	An INode representing a symbolic link.
org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields	INode with additional fields including id, name, permission, access time and modification time.
org.apache.hadoop.hdfs.server.namenode.InotifyFSEditLogOpTranslator	Translates from edit log ops to inotify events.
org.apache.hadoop.hdfs.server.namenode.IsNameNodeActiveServlet	Used by Load Balancers to find the active NameNode.
org.apache.hadoop.hdfs.server.namenode.JournalManager	A JournalManager is responsible for managing a single place of storing edit logs.
org.apache.hadoop.hdfs.server.namenode.JournalManager.CorruptionException	Indicate that a journal is cannot be used to load a certain range of edits.
org.apache.hadoop.hdfs.server.namenode.JournalSet	Manages a collection of Journals.
org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException	The lease that was being used to create this file has expired.
org.apache.hadoop.hdfs.server.namenode.LeaseManager	LeaseManager does the lease housekeeping for writing on files.
org.apache.hadoop.hdfs.server.namenode.MetaRecoveryContext	Context data for an ongoing NameNode metadata recovery process.
org.apache.hadoop.hdfs.server.namenode.MetaRecoveryContext.RequestStopException	Exception thrown when the user has requested processing to stop.
org.apache.hadoop.hdfs.server.namenode.NameNode	NameNode serves as both directory namespace manager and "inode table" for the Hadoop DFS.
NameNode.OperationCategory	Categories of operations supported by the namenode.
org.apache.hadoop.hdfs.server.namenode.NameNodeFormatException	Thrown when NameNode format fails.
org.apache.hadoop.hdfs.server.namenode.NamenodeFsck	This class provides rudimentary checking of DFS volumes for errors and sub-optimal conditions.
org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer	Encapsulates the HTTP server started by the NameNode.
org.apache.hadoop.hdfs.server.namenode.NameNodeLayoutVersion
NameNodeLayoutVersion.Feature	Enums for features that change the layout version.
org.apache.hadoop.hdfs.server.namenode.NameNodeMXBean	This is the JMX management interface for namenode information.
org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker	NameNodeResourceChecker provides a method - hasAvailableDiskSpace - which will return true if and only if the NameNode has disk space available on all required volumes, and any volume which is configured to be redundant.
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer	This class is responsible for handling all of the RPC calls to the NameNode.
org.apache.hadoop.hdfs.server.namenode.NameNodeStatusMXBean	This is the JMX management interface for NameNode status information.
org.apache.hadoop.hdfs.server.namenode.NameNodeUtils	Utility functions for the NameNode.
org.apache.hadoop.hdfs.server.namenode.Namesystem	Namesystem operations.
org.apache.hadoop.hdfs.server.namenode.NetworkTopologyServlet	A servlet to print out the network topology.
org.apache.hadoop.hdfs.server.namenode.NetworkTopologyServlet.BadFormatException
org.apache.hadoop.hdfs.server.namenode.NNStorage	NNStorage is responsible for management of the StorageDirectories used by the NameNode.
NNStorage.NameNodeDirType	Implementation of StorageDirType specific to namenode storage A Storage directory could be of type IMAGE which stores only fsimage, or of type EDITS which stores edits or of type IMAGE_AND_EDITS which stores both fsimage and edits.
NNStorage.NameNodeFile	The filenames used for storing the images.
org.apache.hadoop.hdfs.server.namenode.NNStorageRetentionManager	The NNStorageRetentionManager is responsible for inspecting the storage directories of the NN and enforcing a retention policy on checkpoints and edit logs.
org.apache.hadoop.hdfs.server.namenode.NNUpgradeUtil
org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException	The file has not finished being written to enough datanodes yet.
NullBlockAliasMap	Null sink for region information emitted from FSImage.
Quota	Quota types.
org.apache.hadoop.hdfs.server.namenode.Quota.Counts	Counters for quota counts.
org.apache.hadoop.hdfs.server.namenode.QuotaByStorageTypeEntry
org.apache.hadoop.hdfs.server.namenode.QuotaByStorageTypeEntry.Builder
org.apache.hadoop.hdfs.server.namenode.QuotaCounts	Counters for namespace, storage space and storage type space quota and usage.
org.apache.hadoop.hdfs.server.namenode.QuotaCounts.Builder
org.apache.hadoop.hdfs.server.namenode.ReencryptionHandler	Class for handling re-encrypt EDEK operations.
org.apache.hadoop.hdfs.server.namenode.ReencryptionUpdater	Class for finalizing re-encrypt EDEK operations, by updating file xattrs with edeks returned from reencryption.
org.apache.hadoop.hdfs.server.namenode.RetryStartFileException
org.apache.hadoop.hdfs.server.namenode.SafeMode	SafeMode related operations.
org.apache.hadoop.hdfs.server.namenode.SafeModeException	This exception is thrown when the name node is in safe mode.
org.apache.hadoop.hdfs.server.namenode.SaveNamespaceCancelledException
org.apache.hadoop.hdfs.server.namenode.SaveNamespaceContext	Context for an ongoing SaveNamespace operation.
org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode	The Secondary NameNode is a helper to the primary NameNode.
org.apache.hadoop.hdfs.server.namenode.SecondaryNameNodeInfoMXBean	JMX information of the secondary NameNode
SerialNumberManager	Manage name-to-serial-number maps for various string tables.
org.apache.hadoop.hdfs.server.namenode.SerialNumberManager.StringTable
org.apache.hadoop.hdfs.server.namenode.SerialNumberMap<T>	Map object to serial number.
SingleUGIResolver	Map all owners/groups in external system to a single user in FSImage.
org.apache.hadoop.hdfs.server.namenode.StartupProgressServlet	Servlet that provides a JSON representation of the namenode's current startup progress.
org.apache.hadoop.hdfs.server.namenode.StoragePolicySummary	Aggregate the storage type information for a set of blocks
org.apache.hadoop.hdfs.server.namenode.TransferFsImage	This class provides fetching a specified file from the NameNode.
TransferFsImage.TransferResult
TreePath	Traversal cursor in external filesystem.
TreeWalk	Traversal yielding a hierarchical sequence of paths.
UGIResolver	Pluggable class for mapping ownership and permissions from an external store to an FSImage.
org.apache.hadoop.hdfs.server.namenode.UnsupportedActionException	This exception is thrown when an operation is not supported.
org.apache.hadoop.hdfs.server.namenode.VersionInfoMXBean
org.apache.hadoop.hdfs.server.namenode.XAttrFeature	Feature for extended attributes.
XAttrFormat	Class to pack XAttrs into byte[]. Note: this format is used both in-memory and on-disk.
org.apache.hadoop.hdfs.server.namenode.XAttrPermissionFilter	There are four types of extended attributes <XAttr> defined by the following namespaces: USER - extended user attributes: these can be assigned to files and directories to store arbitrary additional information.
org.apache.hadoop.hdfs.server.namenode.XAttrStorage	XAttrStorage is used to read and set xattrs for an inode.