| 类 | 说明 |
|---|---|
| DelegationTokenFetcher |
Fetch a DelegationToken from the current Namenode and store it in the
specified file.
|
| DFSAdmin |
This class provides some DFS administrative access.
|
| DFSck |
This class provides rudimentary checking of DFS volumes for errors and
sub-optimal conditions.
|
| HDFSConcat |
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