本文整理汇总了Java中org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor.getDfsUsedPercent方法的典型用法代码示例。如果您正苦于以下问题：Java DatanodeDescriptor.getDfsUsedPercent方法的具体用法？Java DatanodeDescriptor.getDfsUsedPercent怎么用？Java DatanodeDescriptor.getDfsUsedPercent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.hdfs.server.blockmanagement.DatanodeDescriptor的用法示例。
在下文中一共展示了DatanodeDescriptor.getDfsUsedPercent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: getNodeUsage
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor; //导入方法依赖的package包/类
@Override // NameNodeMXBean
public String getNodeUsage() {
float median = 0;
float max = 0;
float min = 0;
float dev = 0;
final Map<String, Map<String,Object>> info =
new HashMap<String, Map<String,Object>>();
final List<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
blockManager.getDatanodeManager().fetchDatanodes(live, null, true);
if (live.size() > 0) {
float totalDfsUsed = 0;
float[] usages = new float[live.size()];
int i = 0;
for (DatanodeDescriptor dn : live) {
usages[i++] = dn.getDfsUsedPercent();
totalDfsUsed += dn.getDfsUsedPercent();
}
totalDfsUsed /= live.size();
Arrays.sort(usages);
median = usages[usages.length / 2];
max = usages[usages.length - 1];
min = usages[0];
for (i = 0; i < usages.length; i++) {
dev += (usages[i] - totalDfsUsed) * (usages[i] - totalDfsUsed);
}
dev = (float) Math.sqrt(dev / usages.length);
}
final Map<String, Object> innerInfo = new HashMap<String, Object>();
innerInfo.put("min", StringUtils.format("%.2f%%", min));
innerInfo.put("median", StringUtils.format("%.2f%%", median));
innerInfo.put("max", StringUtils.format("%.2f%%", max));
innerInfo.put("stdDev", StringUtils.format("%.2f%%", dev));
info.put("nodeUsage", innerInfo);
return JSON.toString(info);
}
示例2: getNodeUsage
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor; //导入方法依赖的package包/类
@Override // NameNodeMXBean
public String getNodeUsage() {
float median = 0;
float max = 0;
float min = 0;
float dev = 0;
final Map<String, Map<String,Object>> info =
new HashMap<String, Map<String,Object>>();
final List<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
blockManager.getDatanodeManager().fetchDatanodes(live, null, true);
for (Iterator<DatanodeDescriptor> it = live.iterator(); it.hasNext();) {
DatanodeDescriptor node = it.next();
if (node.isDecommissionInProgress() || node.isDecommissioned()) {
it.remove();
}
}
if (live.size() > 0) {
float totalDfsUsed = 0;
float[] usages = new float[live.size()];
int i = 0;
for (DatanodeDescriptor dn : live) {
usages[i++] = dn.getDfsUsedPercent();
totalDfsUsed += dn.getDfsUsedPercent();
}
totalDfsUsed /= live.size();
Arrays.sort(usages);
median = usages[usages.length / 2];
max = usages[usages.length - 1];
min = usages[0];
for (i = 0; i < usages.length; i++) {
dev += (usages[i] - totalDfsUsed) * (usages[i] - totalDfsUsed);
}
dev = (float) Math.sqrt(dev / usages.length);
}
final Map<String, Object> innerInfo = new HashMap<String, Object>();
innerInfo.put("min", StringUtils.format("%.2f%%", min));
innerInfo.put("median", StringUtils.format("%.2f%%", median));
innerInfo.put("max", StringUtils.format("%.2f%%", max));
innerInfo.put("stdDev", StringUtils.format("%.2f%%", dev));
info.put("nodeUsage", innerInfo);
return JSON.toString(info);
}