- getBlocks
Get a list of blocks belonging to datanode whose total size equals size.
- rollEditLog
Closes the current edit log and opens a new one. The call fails if the file
system is in SafeMode.
- getBlockKeys
Get the current block keys
- getEditLogManifest
Return a structure containing details about all edit logs available to be
fetched from the NameNode.
- versionRequest
Request name-node version and storage information.
- endCheckpoint
A request to the active name-node to finalize previously started checkpoint.
- errorReport
Report to the active name-node an error occurred on a subordinate node.
Depending on the error code
- getMostRecentCheckpointTxId
Get the transaction ID of the most recent checkpoint.
- getTransactionID
- isUpgradeFinalized
- registerSubordinateNamenode
Register a subordinate name-node like backup node.
- startCheckpoint
A request to the active name-node to start a checkpoint. The name-node should
decide whether to admi