| Package | Description | 
|---|---|
| org.apache.hadoop.hbase.io.hfile | Provides implementations of  HFileand HFileBlockCache. | 
| org.apache.hadoop.hbase.io.hfile.bucket | Provides  BucketCache, an implementation ofBlockCache. | 
| org.apache.hadoop.hbase.master | |
| org.apache.hadoop.hbase.regionserver | |
| org.apache.hadoop.hbase.regionserver.wal | 
| Modifier and Type | Class and Description | 
|---|---|
| (package private) static class  | LruBlockCache.EvictionThread | 
| Modifier and Type | Class and Description | 
|---|---|
| (package private) class  | BucketCache.WriterThread | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | HMasterHMaster is the "master server" for HBase. | 
| private static class  | HMaster.InitializationMonitorProtection against zombie master. | 
| static class  | HMasterCommandLine.LocalHMaster | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | HRegionServerHRegionServer makes a set of HRegions available to clients. | 
| class  | LeasesLeases
 There are several server classes in HBase that need to track external
 clients that occasionally send heartbeats. | 
| class  | LogRollerRuns periodically to determine if the WAL should be rolled. | 
| private class  | MemStoreFlusher.FlushHandler | 
| Modifier and Type | Class and Description | 
|---|---|
| private class  | FSHLog.SyncRunnerThread to runs the hdfs sync call. | 
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