| Package | Description | 
|---|---|
| org.apache.hadoop.hbase.ipc | Tools to help define network clients and servers. | 
| org.apache.hadoop.hbase.master | |
| org.apache.hadoop.hbase.master.balancer | |
| org.apache.hadoop.hbase.metrics | Metrics API for HBase. | 
| org.apache.hadoop.hbase.metrics.impl | Implementation of the HBase Metrics framework. | 
| org.apache.hadoop.hbase.regionserver | |
| org.apache.hadoop.hbase.regionserver.wal | |
| org.apache.hadoop.hbase.replication.regionserver | |
| org.apache.hadoop.hbase.rest | HBase REST | 
| org.apache.hadoop.hbase.thrift | Provides an HBase Thrift
service. | 
| org.apache.hadoop.hbase.zookeeper | |
| org.apache.hadoop.metrics2.lib | 
| Class and Description | 
|---|
| MutableFastCounter | 
| Class and Description | 
|---|
| MutableFastCounter | 
| Class and Description | 
|---|
| MutableFastCounter | 
| Class and Description | 
|---|
| DynamicMetricsRegistry An optional metrics registry class for creating and maintaining a
 collection of MetricsMutables, making writing metrics source easier. | 
| MutableFastCounter | 
| Class and Description | 
|---|
| DefaultMetricsSystemHelper | 
| Class and Description | 
|---|
| DynamicMetricsRegistry An optional metrics registry class for creating and maintaining a
 collection of MetricsMutables, making writing metrics source easier. | 
| MetricsExecutorImpl Class to handle the ScheduledExecutorService ScheduledExecutorServiceused by
  MetricsRegionAggregateSourceImpl, and
  JmxCacheBuster | 
| MutableFastCounter | 
| Class and Description | 
|---|
| MutableFastCounter | 
| Class and Description | 
|---|
| MutableFastCounter | 
| MutableHistogram A histogram implementation that runs in constant space, and exports to hadoop2's metrics2 system. | 
| Class and Description | 
|---|
| MutableFastCounter | 
| Class and Description | 
|---|
| MutableFastCounter | 
| Class and Description | 
|---|
| MutableHistogram A histogram implementation that runs in constant space, and exports to hadoop2's metrics2 system. | 
| Class and Description | 
|---|
| DefaultMetricsSystemHelper | 
| DynamicMetricsRegistry An optional metrics registry class for creating and maintaining a
 collection of MetricsMutables, making writing metrics source easier. | 
| MetricsExecutorImpl.ExecutorSingleton | 
| MutableFastCounter | 
| MutableHistogram A histogram implementation that runs in constant space, and exports to hadoop2's metrics2 system. | 
| MutableRangeHistogram Extended histogram implementation with metric range counters. | 
| MutableSizeHistogram Extended histogram implementation with counters for metric size ranges. | 
| MutableTimeHistogram Extended histogram implementation with counters for metric time ranges. | 
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