| Interface | Description |
|---|---|
| BlockReader |
A BlockReader is responsible for reading a single block
from a single datanode.
|
| RemotePeerFactory |
| Class | Description |
|---|---|
| BlockReaderFactory.BlockReaderPeer | |
| BlockReaderFactory.FailureInjector | |
| CorruptFileBlockIterator |
Provides an iterator interface for listCorruptFileBlocks.
|
| DFSClient.Conf |
DFSClient configuration
|
| DFSClient.DFSDataInputStream | Deprecated
use
HdfsDataInputStream instead. |
| DFSHedgedReadMetrics |
The client-side metrics for hedged read feature.
|
| DFSInotifyEventInputStream |
Stream for reading inotify events.
|
| DFSInputStream.ReadStatistics | |
| DFSUtil.ConfiguredNNAddress |
Represent one of the NameNodes configured in the cluster.
|
| ExtendedBlockId |
An immutable key which identifies a block.
|
| HAUtil | |
| KeyProviderCache | |
| NameNodeProxies |
Create proxy objects to communicate with a remote NN.
|
| NameNodeProxies.ProxyAndInfo<PROXYTYPE> |
Wrapper for a client proxy as well as its associated service ID.
|
| Exception | Description |
|---|---|
| UnknownCipherSuiteException |
Thrown when an unknown cipher suite is encountered.
|
| UnknownCryptoProtocolVersionException |
A distributed implementation of FileSystem. This is loosely modelled after
Google's GFS.
The most important difference is that unlike GFS, Hadoop DFS files have strictly one writer at any one time. Bytes are always appended to the end of the writer's stream. There is no notion of "record appends" or "mutations" that are then checked or reordered. Writers simply emit a byte stream. That byte stream is guaranteed to be stored in the order written.
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