Examples with DatanodeStatistics org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStatistics used on opensource projects

Example 1 with DatanodeStatistics

use of org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStatistics in project hadoop by apache.

the class TestDecommission method testUsedCapacity.

@Test
public void testUsedCapacity() throws Exception {
    int numNamenodes = 1;
    int numDatanodes = 2;
    startCluster(numNamenodes, numDatanodes);
    FSNamesystem ns = getCluster().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<>(numDatanodes));
    ArrayList<DatanodeInfo> decommissionedNodes = namenodeDecomList.get(0);
    //decommission one node
    DatanodeInfo decomNode = takeNodeOutofService(0, null, 0, 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);
}