| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.server.datanode.fsdataset.impl; |
| |
| import org.apache.commons.collections.CollectionUtils; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.hdfs.server.datanode.FSCachingGetSpaceUsed; |
| import org.apache.hadoop.hdfs.server.datanode.ReplicaInfo; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.apache.hadoop.util.Time; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Objects; |
| |
| /** |
| * Fast and accurate class to tell how much space HDFS is using. This class gets |
| * hdfs used space from FsDatasetImpl#volumeMap#ReplicaInfos that uses an in |
| * memory way. |
| * |
| * Getting hdfs used space by ReplicaCachingGetSpaceUsed impl only includes |
| * block and meta files, but DU impl is blockpool dir based statistics that will |
| * include additional files, e.g. tmp dir, scanner.cursor file. Getting space |
| * used by DU impl will be greater than by ReplicaCachingGetSpaceUsed impl, but |
| * the latter is more accurate. |
| * |
| * Setting fs.getspaceused.classname to |
| * org.apache.hadoop.hdfs.server.datanode.fsdataset |
| * impl.ReplicaCachingGetSpaceUsed in your core-site.xml if we want to enable. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class ReplicaCachingGetSpaceUsed extends FSCachingGetSpaceUsed { |
| static final Logger LOG = |
| LoggerFactory.getLogger(ReplicaCachingGetSpaceUsed.class); |
| |
| private static final long DEEP_COPY_REPLICA_THRESHOLD_MS = 50; |
| private static final long REPLICA_CACHING_GET_SPACE_USED_THRESHOLD_MS = 1000; |
| private final FsVolumeImpl volume; |
| private final String bpid; |
| |
| public ReplicaCachingGetSpaceUsed(Builder builder) throws IOException { |
| super(builder); |
| volume = builder.getVolume(); |
| bpid = builder.getBpid(); |
| } |
| |
| @Override |
| protected void refresh() { |
| long start = Time.monotonicNow(); |
| long dfsUsed = 0; |
| long count = 0; |
| |
| FsDatasetSpi fsDataset = volume.getDataset(); |
| try { |
| Collection<ReplicaInfo> replicaInfos = |
| (Collection<ReplicaInfo>) fsDataset.deepCopyReplica(bpid); |
| long cost = Time.monotonicNow() - start; |
| if (cost > DEEP_COPY_REPLICA_THRESHOLD_MS) { |
| LOG.debug( |
| "Copy replica infos, blockPoolId: {}, replicas size: {}, " |
| + "duration: {}ms", |
| bpid, replicaInfos.size(), Time.monotonicNow() - start); |
| } |
| |
| if (CollectionUtils.isNotEmpty(replicaInfos)) { |
| for (ReplicaInfo replicaInfo : replicaInfos) { |
| if (Objects.equals(replicaInfo.getVolume().getStorageID(), |
| volume.getStorageID())) { |
| dfsUsed += replicaInfo.getBytesOnDisk(); |
| dfsUsed += replicaInfo.getMetaFile().length(); |
| count++; |
| } |
| } |
| } |
| |
| this.used.set(dfsUsed); |
| cost = Time.monotonicNow() - start; |
| if (cost > REPLICA_CACHING_GET_SPACE_USED_THRESHOLD_MS) { |
| LOG.debug( |
| "Refresh dfs used, bpid: {}, replicas size: {}, dfsUsed: {} " |
| + "on volume: {}, duration: {}ms", |
| bpid, count, used, volume.getStorageID(), |
| Time.monotonicNow() - start); |
| } |
| } catch (Exception e) { |
| LOG.error("ReplicaCachingGetSpaceUsed refresh error", e); |
| } |
| } |
| } |