本文整理汇总了Java中org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStatistics类的典型用法代码示例。如果您正苦于以下问题：Java DatanodeStatistics类的具体用法？Java DatanodeStatistics怎么用？Java DatanodeStatistics使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
DatanodeStatistics类属于org.apache.hadoop.hdfs.server.blockmanagement包，在下文中一共展示了DatanodeStatistics类的1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: testUsedCapacity
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStatistics; //导入依赖的package包/类
@Test
public void testUsedCapacity() throws Exception {
int numNamenodes = 1;
int numDatanodes = 2;
startCluster(numNamenodes,numDatanodes,conf);
cluster.waitActive();
FSNamesystem ns = cluster.getNamesystem(0);
BlockManager blockManager = ns.getBlockManager();
DatanodeStatistics datanodeStatistics = blockManager.getDatanodeManager()
.getDatanodeStatistics();
long initialUsedCapacity = datanodeStatistics.getCapacityUsed();
long initialTotalCapacity = datanodeStatistics.getCapacityTotal();
long initialBlockPoolUsed = datanodeStatistics.getBlockPoolUsed();
ArrayList<ArrayList<DatanodeInfo>> namenodeDecomList =
new ArrayList<ArrayList<DatanodeInfo>>(numNamenodes);
namenodeDecomList.add(0, new ArrayList<DatanodeInfo>(numDatanodes));
ArrayList<DatanodeInfo> decommissionedNodes = namenodeDecomList.get(0);
//decommission one node
DatanodeInfo decomNode = decommissionNode(0, null, decommissionedNodes,
AdminStates.DECOMMISSIONED);
decommissionedNodes.add(decomNode);
long newUsedCapacity = datanodeStatistics.getCapacityUsed();
long newTotalCapacity = datanodeStatistics.getCapacityTotal();
long newBlockPoolUsed = datanodeStatistics.getBlockPoolUsed();
assertTrue("DfsUsedCapacity should not be the same after a node has " +
"been decommissioned!", initialUsedCapacity != newUsedCapacity);
assertTrue("TotalCapacity should not be the same after a node has " +
"been decommissioned!", initialTotalCapacity != newTotalCapacity);
assertTrue("BlockPoolUsed should not be the same after a node has " +
"been decommissioned!",initialBlockPoolUsed != newBlockPoolUsed);
}