Interface | Description |
---|---|
HAContext |
Context that is to be used by
HAState for getting/setting the
current state and performing required operations. |
Class | Description |
---|---|
ActiveState |
Active state of the namenode.
|
BootstrapStandby |
Tool which allows the standby node's storage directories to be bootstrapped
by copying the latest namespace snapshot from the active namenode.
|
ConfiguredFailoverProxyProvider<T> |
A FailoverProxyProvider implementation which allows one to configure two URIs
to connect to during fail-over.
|
EditLogTailer |
EditLogTailer represents a thread which periodically reads from edits
journals and applies the transactions contained within to a given
FSNamesystem.
|
HAState |
Namenode base state to implement state machine pattern.
|
StandbyCheckpointer |
Thread which runs inside the NN when it's in Standby state,
periodically waking up to take a checkpoint of the namespace.
|
StandbyState |
Namenode standby state.
|
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