本文整理汇总了Java中org.apache.hadoop.hdfs.server.namenode.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.namenode.DatanodeDescriptor的用法示例。
在下文中一共展示了DatanodeDescriptor.getDfsUsedPercent方法的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: doUpdates
import org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor; //导入方法依赖的package包/类
/**
* Since this object is a registered updater, this method will be called
* periodically, e.g. every 5 seconds.
* We set the metrics value within this function before pushing it out.
* FSNamesystem updates its own local variables which are
* light weight compared to Metrics counters.
*
* Some of the metrics are explicity casted to int. Few metrics collectors
* do not handle long values. It is safe to cast to int for now as all these
* values fit in int value.
* Metrics related to DFS capacity are stored in bytes which do not fit in
* int, so they are rounded to GB
*/
public void doUpdates(MetricsContext unused) {
/**
* ToFix
* If the metrics counter were instead stored in the metrics objects themselves
* we could avoid copying the values on each update.
*/
ArrayList<DatanodeDescriptor> live = new ArrayList<DatanodeDescriptor>();
populateDatanodeMetrics(live, new ArrayList<DatanodeDescriptor>());
float datanodeMin = 0;
float datanodeMedian = 0;
float datanodeMax = 0;
float datanodeStdev = 0;
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);
datanodeMedian = usages[usages.length/2];
datanodeMax = usages[usages.length - 1];
datanodeMin = usages[0];
for (i = 0; i < usages.length; i++) {
datanodeStdev += (usages[i] - totalDFSUsed) * (usages[i] - totalDFSUsed);
}
datanodeStdev = (float) Math.sqrt(datanodeStdev/live.size());
}
synchronized (this) {
numDeadMonitoringThread.set(fsNameSystem.getNumDeadMonitoringThread());
filesTotal.set((int) fsNameSystem.getFilesAndDirectoriesTotal());
blocksTotal.set((int)fsNameSystem.getBlocksTotal());
diskSpaceTotalGB.set(roundBytesToGBytes(fsNameSystem.getDiskSpaceTotal()));
datanodesUsagePctMin.set((int) datanodeMin);
datanodesUsagePctMax.set((int) datanodeMax);
datanodesUsagePctMedian.set((int) datanodeMedian);
datanodesUsagePctStdev.set((int) datanodeStdev);
capacityTotalGB.set(roundBytesToGBytes(fsNameSystem.getCapacityTotal()));
capacityUsedGB.set(roundBytesToGBytes(fsNameSystem.getCapacityUsed()));
capacityRemainingGB.set(roundBytesToGBytes(fsNameSystem.
getCapacityRemaining()));
totalLoad.set(fsNameSystem.getTotalLoad());
corruptBlocks.set((int)fsNameSystem.getCorruptReplicaBlocks());
excessBlocks.set((int)fsNameSystem.getExcessBlocks());
pendingDeletionBlocks.set((int)fsNameSystem.getPendingDeletionBlocks());
pendingReplicationBlocks.set((int)fsNameSystem.
getPendingReplicationBlocks());
underReplicatedBlocks.set((int)fsNameSystem.getUnderReplicatedBlocks());
scheduledReplicationBlocks.set((int)fsNameSystem.
getScheduledReplicationBlocks());
missingBlocks.set((int)fsNameSystem.getMissingBlocksCount());
blockCapacity.set(fsNameSystem.getBlockCapacity());
numLeases.set(fsNameSystem.leaseManager.countLease());
numUnderConstructionFiles.set(fsNameSystem.leaseManager.countPath());
upgradeTime.set(fsNameSystem.getUpgradeTime());
for (MetricsBase m : registry.getMetricsList()) {
m.pushMetric(metricsRecord);
}
}
metricsRecord.update();
}