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Interface Summary | |
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AssignmentListener | Get notification of assignment events. |
ClusterStatusPublisher.Publisher | |
LoadBalancer | Makes decisions about the placement and movement of Regions across RegionServers. |
MasterServices | Services Master supplies |
MetricsAssignmentManagerSource | |
MetricsMasterFileSystemSource | |
MetricsMasterSource | Interface that classes that expose metrics about the master will implement. |
MetricsMasterSourceFactory | Interface of a factory to create MetricsMasterSource when given a MetricsMasterWrapper |
MetricsMasterWrapper | This is the interface that will expose information to hadoop1/hadoop2 implementations of the MetricsMasterSource. |
MetricsSnapshotSource | |
ServerListener | Get notification of server events. |
SnapshotSentinel | Watch the current snapshot under process |
SplitLogManager.TaskFinisher | SplitLogManager can use objects implementing this interface to
finish off a partially done task by SplitLogWorker . |
TableLockManager.TableLock | A distributed lock for a table. |
Class Summary | |
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ActiveMasterManager | Handles everything on master-side related to master election. |
AssignCallable | A callable object that invokes the corresponding action that needs to be taken for assignment of a region in transition. |
AssignmentManager | Manages and performs region assignment. |
AssignmentVerificationReport | Helper class that is used by RegionPlacementMaintainer to print
information for favored nodes |
BulkAssigner | Base class used bulk assigning and unassigning regions. |
BulkReOpen | Performs bulk reopen of the list of regions provided to it. |
CatalogJanitor | A janitor for the catalog tables. |
ClusterStatusPublisher | Class to publish the cluster status to the client. |
ClusterStatusPublisher.MulticastPublisher | |
DeadServer | Class to hold dead servers list and utility querying dead server list. |
GeneralBulkAssigner | Run bulk assign. |
HMaster | HMaster is the "master server" for HBase. |
HMasterCommandLine | |
HMasterCommandLine.LocalHMaster | |
MasterCoprocessorHost | Provides the coprocessor framework and environment for master oriented operations. |
MasterDumpServlet | |
MasterFileSystem | This class abstracts a bunch of operations the HMaster needs to interact with the underlying file system, including splitting log files, checking file system status, etc. |
MasterStatusServlet | The servlet responsible for rendering the index page of the master. |
MetricsAssignmentManager | |
MetricsAssignmentManagerSourceImpl | |
MetricsMaster | This class is for maintaining the various master statistics and publishing them through the metrics interfaces. |
MetricsMasterFileSystem | |
MetricsMasterFilesystemSourceImpl | |
MetricsMasterSourceFactoryImpl | Factory to create MetricsMasterSource when given a MetricsMasterWrapper |
MetricsMasterSourceImpl | Hadoop1 implementation of MetricsMasterSource. |
MetricsMasterWrapperImpl | Impl for exposing HMaster Information through JMX |
MetricsSnapshot | |
MetricsSnapshotSourceImpl | |
OfflineCallback | Callback handler for creating unassigned offline znodes used during bulk assign, async setting region to offline. |
RackManager | Wrapper over the rack resolution utility in Hadoop. |
RegionPlacementMaintainer | A tool that is used for manipulating and viewing favored nodes information for regions. |
RegionPlacementMaintainer.RandomizedMatrix | Some algorithms for solving the assignment problem may traverse workers or jobs in linear order which may result in skewing the assignments of the first jobs in the matrix toward the last workers in the matrix if the costs are uniform. |
RegionPlan | Stores the plan for the move of an individual region. |
RegionPlan.RegionPlanComparator | |
RegionState | State of a Region while undergoing transitions. |
RegionStates | Region state accountant. |
RegionStateStore | A helper to persist region state in meta. |
ServerManager | The ServerManager class manages info about region servers. |
SnapshotOfRegionAssignmentFromMeta | Used internally for reading meta and constructing datastructures that are then queried, for things like regions to regionservers, table to regions, etc. |
SplitLogManager | Distributes the task of log splitting to the available region servers. |
TableLockManager | A manager for distributed table level locks. |
TableLockManager.NullTableLockManager | A null implementation |
TableNamespaceManager | This is a helper class used to manage the namespace
metadata that is stored in TableName.NAMESPACE_TABLE_NAME
It also mirrors updates to the ZK store by forwarding updates to
ZKNamespaceManager |
UnAssignCallable | A callable object that invokes the corresponding action that needs to be taken for unassignment of a region in transition. |
Enum Summary | |
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RegionState.State | |
SplitLogManager.TaskFinisher.Status | status that can be returned finish() |
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