Package alluxio.underfs

Interface Summary

Interface	Description
AsyncUfsClient	The async UFS client interface.
AtomicFileOutputStreamCallback	A AtomicFileOutputStreamCallback is the callback interface used when using a AtomicFileOutputStream.
ContentHashable	Interface for returning the content hash.
MultipartUploader	The multipart uploader interface to support multipart uploading.
ObjectUnderFileSystem.ObjectListingChunk	A chunk of listing results.
ObjectUnderFileSystem.ObjectStoreOperation<T>	Represents an object store operation.
UfsManager	A class that manages the UFS used by different services.
UnderFileSystem	Alluxio stores data into an under layer file system.
UnderFileSystemFactory	Interface for under file system factories.

Class Summary

Class	Description
AbstractUfsManager	Basic implementation of UfsManager.
AbstractUfsManager.Key	The key of the UFS cache.
AtomicFileOutputStream	A AtomicFileOutputStream writes to a temporary file and renames on close.
BaseUnderFileSystem	A base abstract UnderFileSystem.
ByteBufferResourcePool	A simple byte buffer resource pool.
ConsistentUnderFileSystem	Represents a consistent under filesystem which does not have eventual consistency issues.
Fingerprint	Fingerprint for a UFS file or directory.
JobUfsManager	Implementation of UfsManager to manage the ufs used by different job service processes.
MasterUfsManager	A class that manages the UFS for master servers.
MultiRangeObjectInputStream	A stream for reading data using range queries.
ObjectLowLevelOutputStream	[Experimental] A stream for writing a file into object storage using streaming upload.
ObjectMultipartUploadOutputStream	Upload File to object storage in multiple parts.
ObjectPositionReader	A stream for reading data using position reader.
ObjectUnderFileSystem	An object based abstract UnderFileSystem.
ObjectUnderFileSystem.ObjectPermissions	Permissions in object UFS.
ObjectUnderFileSystem.ObjectStatus	Information about a single object in object UFS.
SeekableUnderFileInputStream	A seekable under file input stream wrapper that encapsulates the under file input stream.
UfsDirectoryStatus	Information about a directory in the under file system.
UfsFileStatus	Information about a file in UnderFileSystem.
UfsInputStreamCache	This class implements a BlockReader to read a block directly from UFS, and optionally cache the block to the Alluxio worker if the whole block it is read.
UfsIOManager	Control UFS IO.
UfsLoadResult	The UfsLoadResult represents the result of a load operation on an Under File System (UFS).
UfsManager.UfsClient	Container for a UFS and the URI for that UFS.
UfsStatus	Information about a file or a directory in the under file system.
UfsStatusCache	This class is a cache from an Alluxio namespace URI (AlluxioURI, i.e.
UnderFileSystem.Factory	The factory for the UnderFileSystem.
UnderFileSystemConfiguration	Ufs configuration properties, including ufs specific configuration and global configuration.
UnderFileSystemFactoryRegistry	Central registry of available UnderFileSystemFactory instances that uses the ServiceLoader mechanism to automatically discover available factories and provides a central place for obtaining actual UnderFileSystem instances.
UnderFileSystemWithLogging	This class forwards all calls to the UnderFileSystem interface to an internal implementation.
UnderFileSystemWithLogging.UfsCallable<T>	Interface representing a callable to the under storage system which throws an IOException if an error occurs during the external communication.
WorkerUfsManager	The default implementation of UfsManager to manage the ufs used by different worker services.

Enum Summary

Enum	Description
ChecksumType	UFS checksum type.
Fingerprint.Tag	The possible tags within the fingerprint.
Fingerprint.Type	The possible types of the fingerprint.
UfsMode	Operation mode for under storage.
UnderFileSystem.SpaceType	The different types of space indicate the total space, the free space and the space used in the under file system.