org.apache.hadoop.hbase.replication.regionserver

Class ReplicationMarkerChore

java.lang.Object

org.apache.hadoop.hbase.ScheduledChore

org.apache.hadoop.hbase.replication.regionserver.ReplicationMarkerChore

All Implemented Interfaces:

Runnable

@InterfaceAudience.Private
public class ReplicationMarkerChore
extends ScheduledChore

This chore is responsible to create replication marker rows with special WALEdit with family as WALEdit.METAFAMILY and column qualifier as WALEdit.REPLICATION_MARKER and empty value. If config key REPLICATION_MARKER_ENABLED_KEY is set to true, then we will create 1 marker row every REPLICATION_MARKER_CHORE_DURATION_KEY ms ReplicationSourceWALReader will populate the Replication Marker edit with region_server_name, wal_name and wal_offset encoded in WALProtos.ReplicationMarkerDescriptor object. Replication will change the REPLICATION_SCOPE for this edit to GLOBAL so that it can replicate. On the sink cluster, ReplicationSink will convert the ReplicationMarkerDescriptor into a Put mutation to REPLICATION_SINK_TRACKER_TABLE_NAME_STR table.

Field Summary

Fields

Modifier and Type	Field and Description
static RegionInfo	REGION_INFO
static int	REPLICATION_MARKER_CHORE_DURATION_DEFAULT
static String	REPLICATION_MARKER_CHORE_DURATION_KEY
static boolean	REPLICATION_MARKER_ENABLED_DEFAULT
static String	REPLICATION_MARKER_ENABLED_KEY

Constructor Summary

Constructors

Constructor and Description
ReplicationMarkerChore(Stoppable stopper, RegionServerServices rsServices, int period)

Method Summary

Modifier and Type	Method and Description
protected void	chore()
static byte[]	getRowKey(String serverName, long timestamp) Creates a rowkey with region server name and timestamp.

Methods inherited from class org.apache.hadoop.hbase.ScheduledChore

cancel, cancel, choreForTesting, cleanup, getInitialDelay, getName, getPeriod, getStopper, getTimeUnit, initialChore, isInitialChoreComplete, isScheduled, run, shutdown, shutdown, toString, triggerNow

Methods inherited from class java.lang.Object

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

Field Detail

REGION_INFO

public static final RegionInfo REGION_INFO

REPLICATION_MARKER_ENABLED_KEY

public static final String REPLICATION_MARKER_ENABLED_KEY

See Also:

Constant Field Values

REPLICATION_MARKER_ENABLED_DEFAULT

public static final boolean REPLICATION_MARKER_ENABLED_DEFAULT

See Also:

Constant Field Values

REPLICATION_MARKER_CHORE_DURATION_KEY

public static final String REPLICATION_MARKER_CHORE_DURATION_KEY

See Also:

Constant Field Values

REPLICATION_MARKER_CHORE_DURATION_DEFAULT

public static final int REPLICATION_MARKER_CHORE_DURATION_DEFAULT

See Also:

Constant Field Values

Constructor Detail

ReplicationMarkerChore

public ReplicationMarkerChore(Stoppable stopper,
                              RegionServerServices rsServices,
                              int period)

Method Detail

chore

protected void chore()

Specified by:

chore in class ScheduledChore

getRowKey

public static byte[] getRowKey(String serverName,
                               long timestamp)

Creates a rowkey with region server name and timestamp.

Parameters:

serverName - region server name

timestamp - timestamp