本文整理汇总了Java中org.apache.hadoop.net.Node.getNetworkLocation方法的典型用法代码示例。如果您正苦于以下问题：Java Node.getNetworkLocation方法的具体用法？Java Node.getNetworkLocation怎么用？Java Node.getNetworkLocation使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.hadoop.net.Node的用法示例。
在下文中一共展示了Node.getNetworkLocation方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: chooseFromNextRack
import org.apache.hadoop.net.Node; //导入方法依赖的package包/类
private DatanodeStorageInfo chooseFromNextRack(Node next,
Set<Node> excludedNodes,
long blocksize,
int maxNodesPerRack,
List<DatanodeStorageInfo> results,
boolean avoidStaleNodes,
EnumMap<StorageType, Integer> storageTypes) throws NotEnoughReplicasException {
final String nextRack = next.getNetworkLocation();
try {
return chooseRandom(nextRack, excludedNodes, blocksize, maxNodesPerRack,
results, avoidStaleNodes, storageTypes);
} catch(NotEnoughReplicasException e) {
if (LOG.isDebugEnabled()) {
LOG.debug("Failed to choose from the next rack (location = " + nextRack
+ "), retry choosing ramdomly", e);
}
//otherwise randomly choose one from the network
return chooseRandom(NodeBase.ROOT, excludedNodes, blocksize,
maxNodesPerRack, results, avoidStaleNodes, storageTypes);
}
}
示例2: chooseLocalRack
import org.apache.hadoop.net.Node; //导入方法依赖的package包/类
/**
* Choose one node from the rack that <i>localMachine</i> is on.
* if no such node is available, choose one node from the rack where
* a second replica is on.
* if still no such node is available, choose a random node
* in the cluster.
* @return the chosen node
*/
protected DatanodeStorageInfo chooseLocalRack(Node localMachine,
Set<Node> excludedNodes,
long blocksize,
int maxNodesPerRack,
List<DatanodeStorageInfo> results,
boolean avoidStaleNodes,
EnumMap<StorageType, Integer> storageTypes)
throws NotEnoughReplicasException {
// no local machine, so choose a random machine
if (localMachine == null) {
return chooseRandom(NodeBase.ROOT, excludedNodes, blocksize,
maxNodesPerRack, results, avoidStaleNodes, storageTypes);
}
final String localRack = localMachine.getNetworkLocation();
try {
// choose one from the local rack
return chooseRandom(localRack, excludedNodes,
blocksize, maxNodesPerRack, results, avoidStaleNodes, storageTypes);
} catch (NotEnoughReplicasException e) {
// find the next replica and retry with its rack
for(DatanodeStorageInfo resultStorage : results) {
DatanodeDescriptor nextNode = resultStorage.getDatanodeDescriptor();
if (nextNode != localMachine) {
if (LOG.isDebugEnabled()) {
LOG.debug("Failed to choose from local rack (location = " + localRack
+ "), retry with the rack of the next replica (location = "
+ nextNode.getNetworkLocation() + ")", e);
}
return chooseFromNextRack(nextNode, excludedNodes, blocksize,
maxNodesPerRack, results, avoidStaleNodes, storageTypes);
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("Failed to choose from local rack (location = " + localRack
+ "); the second replica is not found, retry choosing ramdomly", e);
}
//the second replica is not found, randomly choose one from the network
return chooseRandom(NodeBase.ROOT, excludedNodes, blocksize,
maxNodesPerRack, results, avoidStaleNodes, storageTypes);
}
}