alluxio.cli.fsadmin.command

Class DecommissionWorkerCommand

java.lang.Object

alluxio.cli.fsadmin.command.AbstractFsAdminCommand

alluxio.cli.fsadmin.command.DecommissionWorkerCommand

All Implemented Interfaces:

Command, Closeable, AutoCloseable

public final class DecommissionWorkerCommand
extends AbstractFsAdminCommand

Decommission a specific batch of workers, the decommissioned worker is not automatically shutdown and will not be picked for new I/O requests. The workers still serve concurrent requests and eventually will become idle. This command waits for the workers to be idle. So when this command returns, it will be safe for the admin to kill/restart those workers. See the help message for more details.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DecommissionWorkerCommand.ReturnCode A set of return codes.
static class	DecommissionWorkerCommand.WorkerStatus A wrapper managing worker activeness status and deciding whether the worker can be safely killed.

Field Summary

Fields inherited from class alluxio.cli.fsadmin.command.AbstractFsAdminCommand

mBlockClient, mFsClient, mJobMasterClient, mJobMasterJournalMasterClient, mMasterJournalMasterClient, mMetaClient, mMetricsClient, mPrintStream

Constructor Summary

Constructors

Constructor and Description
DecommissionWorkerCommand(Context context, AlluxioConfiguration alluxioConf) Constructs a new instance to decommission a given batch of workers from Alluxio.

Method Summary

Modifier and Type	Method and Description
String	getCommandName() Gets the command name as input from the shell.
String	getDescription()
org.apache.commons.cli.Options	getOptions()
String	getUsage()
int	run(org.apache.commons.cli.CommandLine cl) Runs the command.

Methods inherited from class java.lang.Object

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

Methods inherited from interface alluxio.cli.Command

close, getSubCommands, hasSubCommand, parseAndValidateArgs, validateArgs

Constructor Detail

DecommissionWorkerCommand

public DecommissionWorkerCommand(Context context,
                                 AlluxioConfiguration alluxioConf)

Constructs a new instance to decommission a given batch of workers from Alluxio.

Parameters:

context - fsadmin command context

alluxioConf - Alluxio configuration

Method Detail

run

public int run(org.apache.commons.cli.CommandLine cl)

Description copied from interface: Command

Runs the command.

Parameters:

cl - the parsed command line for the arguments

Returns:

the result of running the command

getCommandName

public String getCommandName()

Description copied from interface: Command

Gets the command name as input from the shell.

Returns:

the command name

getOptions

public org.apache.commons.cli.Options getOptions()

Returns:

the supported Options of the command

getUsage

public String getUsage()

Returns:

the usage information of the command

getDescription

public String getDescription()

Returns:

the description information of the command