org.apache.hadoop.net
Class TableMapping
java.lang.Object
org.apache.hadoop.net.CachedDNSToSwitchMapping
org.apache.hadoop.net.TableMapping
- All Implemented Interfaces:
- DNSToSwitchMapping
public class TableMapping
- extends CachedDNSToSwitchMapping
Simple DNSToSwitchMapping
implementation that reads a 2 column text
file. The columns are separated by whitespace. The first column is a DNS or
IP address and the second column specifies the rack where the address maps.
This class uses the configuration parameter net.topology.table.file.name
to locate the mapping file.
Calls to CachedDNSToSwitchMapping.resolve(List)
will look up the address as defined in the
mapping file. If no entry corresponding to the address is found, the value
/default-rack
is returned.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MAPPING_FILE
public static final String MAPPING_FILE
- See Also:
- Constant Field Values
TableMapping
public TableMapping()
getConf
public Configuration getConf()
setConf
public void setConf(Configuration conf)
Copyright © 2009 The Apache Software Foundation