| /** |
| * 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.blockmanagement; |
| |
| import java.util.Map; |
| |
| import org.apache.hadoop.fs.StorageType; |
| import org.apache.hadoop.hdfs.protocol.ClientProtocol; |
| |
| /** Datanode statistics */ |
| public interface DatanodeStatistics { |
| |
| /** @return the total capacity */ |
| public long getCapacityTotal(); |
| |
| /** @return the used capacity */ |
| public long getCapacityUsed(); |
| |
| /** @return the percentage of the used capacity over the total capacity. */ |
| public float getCapacityUsedPercent(); |
| |
| /** @return the remaining capacity */ |
| public long getCapacityRemaining(); |
| |
| /** @return the percentage of the remaining capacity over the total capacity. */ |
| public float getCapacityRemainingPercent(); |
| |
| /** @return the block pool used. */ |
| public long getBlockPoolUsed(); |
| |
| /** @return the percentage of the block pool used space over the total capacity. */ |
| public float getPercentBlockPoolUsed(); |
| |
| /** @return the total cache capacity of all DataNodes */ |
| public long getCacheCapacity(); |
| |
| /** @return the total cache used by all DataNodes */ |
| public long getCacheUsed(); |
| |
| /** @return the xceiver count */ |
| public int getXceiverCount(); |
| |
| /** @return average xceiver count for non-decommission(ing|ed) nodes */ |
| public int getInServiceXceiverCount(); |
| |
| /** @return number of non-decommission(ing|ed) nodes */ |
| public int getNumDatanodesInService(); |
| |
| /** |
| * @return the total used space by data nodes for non-DFS purposes |
| * such as storing temporary files on the local file system |
| */ |
| public long getCapacityUsedNonDFS(); |
| |
| /** The same as {@link ClientProtocol#getStats()}. |
| * The block related entries are set to -1. |
| */ |
| public long[] getStats(); |
| |
| /** @return the expired heartbeats */ |
| public int getExpiredHeartbeats(); |
| |
| /** @return Storage Tier statistics*/ |
| Map<StorageType, StorageTypeStats> getStorageTypeStats(); |
| } |