org.apache.hadoop.hbase.tool

类 Canary

java.lang.Object

org.apache.hadoop.hbase.tool.Canary

所有已实现的接口:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

@InterfaceAudience.Private
public final class Canary
extends Object
implements org.apache.hadoop.util.Tool

HBase Canary Tool for "canary monitoring" of a running HBase cluster. There are three modes:

1. region mode (Default): For each region, try to get one row per column family outputting information on failure (ERROR) or else the latency.
2. regionserver mode: For each regionserver try to get one row from one table selected randomly outputting information on failure (ERROR) or else the latency.
3. zookeeper mode: for each zookeeper instance, selects a znode outputting information on failure (ERROR) or else the latency.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	Canary.Monitor A Monitor super-class can be extended by users
static class	Canary.RegionServerStdOutSink By RegionServer, for 'regionserver' mode.
static class	Canary.RegionStdOutSink By Region, for 'region' mode.
static interface	Canary.Sink Sink interface used by the canary to output information
static class	Canary.StdOutSink Simple implementation of canary sink that allows plotting to a file or standard output.
static class	Canary.ZookeeperStdOutSink Output for 'zookeeper' mode.

字段概要

字段

限定符和类型	字段和说明
static TableName	DEFAULT_WRITE_TABLE_NAME

构造器概要

构造器

构造器和说明
Canary()
Canary(ExecutorService executor)

方法概要

限定符和类型	方法和说明
org.apache.hadoop.conf.Configuration	getConf()
Map<String,String>	getReadFailures()
Map<String,String>	getWriteFailures()
static void	main(String[] args)
Canary.Monitor	newMonitor(Connection connection, int index, String[] args) A Factory method for Canary.Monitor.
int	run(String[] args)
void	setConf(org.apache.hadoop.conf.Configuration conf)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT_WRITE_TABLE_NAME

public static final TableName DEFAULT_WRITE_TABLE_NAME

构造器详细资料

Canary

public Canary()

Canary

public Canary(ExecutorService executor)

方法详细资料

getConf

public org.apache.hadoop.conf.Configuration getConf()

指定者:

getConf 在接口中 org.apache.hadoop.conf.Configurable

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

指定者:

setConf 在接口中 org.apache.hadoop.conf.Configurable

run

public int run(String[] args)
        throws Exception

指定者:

run 在接口中 org.apache.hadoop.util.Tool

抛出:

Exception

getReadFailures

public Map<String,String> getReadFailures()

getWriteFailures

public Map<String,String> getWriteFailures()

newMonitor

public Canary.Monitor newMonitor(Connection connection,
                                 int index,
                                 String[] args)

A Factory method for Canary.Monitor. Makes a RegionServerMonitor, or a ZooKeeperMonitor, or a RegionMonitor.

参数:

index - a start index for monitor target

args - args passed from user

返回:

a Monitor instance

main

public static void main(String[] args)
                 throws Exception

抛出:

Exception