Package | Description |
---|---|
org.apache.hadoop.hdfs.server.federation.router |
The router package includes the core services for a HDFS federation router.
|
org.apache.hadoop.hdfs.server.federation.store |
The federation state store tracks persistent values that are shared between
multiple routers.
|
Modifier and Type | Class and Description |
---|---|
class |
NamenodeHeartbeatService
The
Router periodically checks the state of a Namenode (usually on
the same server) and reports their high availability (HA) state and
load/space status to the
StateStoreService
. |
class |
RouterHeartbeatService
Service to periodically update the Router current state in the State Store.
|
class |
RouterQuotaUpdateService
Service to periodically update the
RouterQuotaUsage
cached information in the Router . |
class |
RouterSafemodeService
Service to periodically check if the
StateStoreService cached information in the Router is up to date. |
Modifier and Type | Class and Description |
---|---|
class |
StateStoreCacheUpdateService
Service to periodically update the
StateStoreService
cached information in the
Router . |
class |
StateStoreConnectionMonitorService
Service to periodically monitor the connection of the StateStore
StateStoreService data store and to re-open the connection
to the data store if required. |
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