HDDS-82. Merge ContainerData and ContainerStatus classes. Contributed by Bharat Viswanadham.

hadoop-hdds/common/src/main/proto/DatanodeContainerProtocol.proto

@@ -152,6 +152,7 @@ enum ContainerLifeCycleState {
     OPEN = 1;
     CLOSING = 2;
     CLOSED = 3;
+    INVALID = 4;
 }
 
 message ContainerCommandRequestProto {

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java

@@ -52,6 +52,17 @@ public class ContainerData {
   private ContainerType containerType;
   private String containerDBType;
 
+
+  /**
+   * Number of pending deletion blocks in container.
+   */
+  private int numPendingDeletionBlocks;
+  private AtomicLong readBytes;
+  private AtomicLong writeBytes;
+  private AtomicLong readCount;
+  private AtomicLong writeCount;
+
+
   /**
    * Constructs a  ContainerData Object.
    *
@@ -66,6 +77,34 @@ public class ContainerData {
     this.bytesUsed =  new AtomicLong(0L);
     this.containerID = containerID;
     this.state = ContainerLifeCycleState.OPEN;
+    this.numPendingDeletionBlocks = 0;
+    this.readCount = new AtomicLong(0L);
+    this.readBytes =  new AtomicLong(0L);
+    this.writeCount =  new AtomicLong(0L);
+    this.writeBytes =  new AtomicLong(0L);
+  }
+
+  /**
+   * Constructs a  ContainerData Object.
+   *
+   * @param containerID - ID
+   * @param conf - Configuration
+   * @param state - ContainerLifeCycleState
+   * @param
+   */
+  public ContainerData(long containerID, Configuration conf,
+                       ContainerLifeCycleState state) {
+    this.metadata = new TreeMap<>();
+    this.maxSize = conf.getLong(ScmConfigKeys.SCM_CONTAINER_CLIENT_MAX_SIZE_KEY,
+        ScmConfigKeys.SCM_CONTAINER_CLIENT_MAX_SIZE_DEFAULT) * OzoneConsts.GB;
+    this.bytesUsed =  new AtomicLong(0L);
+    this.containerID = containerID;
+    this.state = state;
+    this.numPendingDeletionBlocks = 0;
+    this.readCount = new AtomicLong(0L);
+    this.readBytes =  new AtomicLong(0L);
+    this.writeCount =  new AtomicLong(0L);
+    this.writeBytes =  new AtomicLong(0L);
   }
 
   /**
@@ -292,6 +331,14 @@ public class ContainerData {
     return ContainerLifeCycleState.OPEN == state;
   }
 
+  /**
+   * checks if the container is invalid.
+   * @return - boolean
+   */
+  public boolean isValid() {
+    return !(ContainerLifeCycleState.INVALID == state);
+  }
+
   /**
    * Marks this container as closed.
    */
@@ -317,11 +364,119 @@ public class ContainerData {
     this.bytesUsed.set(used);
   }
 
-  public long addBytesUsed(long delta) {
-    return this.bytesUsed.addAndGet(delta);
-  }
-
+  /**
+   * Get the number of bytes used by the container.
+   * @return the number of bytes used by the container.
+   */
   public long getBytesUsed() {
     return bytesUsed.get();
   }
+
+  /**
+   * Increase the number of bytes used by the container.
+   * @param used number of bytes used by the container.
+   * @return the current number of bytes used by the container afert increase.
+   */
+  public long incrBytesUsed(long used) {
+    return this.bytesUsed.addAndGet(used);
+  }
+
+
+  /**
+   * Decrease the number of bytes used by the container.
+   * @param reclaimed the number of bytes reclaimed from the container.
+   * @return the current number of bytes used by the container after decrease.
+   */
+  public long decrBytesUsed(long reclaimed) {
+    return this.bytesUsed.addAndGet(-1L * reclaimed);
+  }
+
+  /**
+   * Increase the count of pending deletion blocks.
+   *
+   * @param numBlocks increment number
+   */
+  public void incrPendingDeletionBlocks(int numBlocks) {
+    this.numPendingDeletionBlocks += numBlocks;
+  }
+
+  /**
+   * Decrease the count of pending deletion blocks.
+   *
+   * @param numBlocks decrement number
+   */
+  public void decrPendingDeletionBlocks(int numBlocks) {
+    this.numPendingDeletionBlocks -= numBlocks;
+  }
+
+  /**
+   * Get the number of pending deletion blocks.
+   */
+  public int getNumPendingDeletionBlocks() {
+    return this.numPendingDeletionBlocks;
+  }
+
+  /**
+   * Get the number of bytes read from the container.
+   * @return the number of bytes read from the container.
+   */
+  public long getReadBytes() {
+    return readBytes.get();
+  }
+
+  /**
+   * Increase the number of bytes read from the container.
+   * @param bytes number of bytes read.
+   */
+  public void incrReadBytes(long bytes) {
+    this.readBytes.addAndGet(bytes);
+  }
+
+  /**
+   * Get the number of times the container is read.
+   * @return the number of times the container is read.
+   */
+  public long getReadCount() {
+    return readCount.get();
+  }
+
+  /**
+   * Increase the number of container read count by 1.
+   */
+  public void incrReadCount() {
+    this.readCount.incrementAndGet();
+  }
+
+  /**
+   * Get the number of bytes write into the container.
+   * @return the number of bytes write into the container.
+   */
+  public long getWriteBytes() {
+    return writeBytes.get();
+  }
+
+  /**
+   * Increase the number of bytes write into the container.
+   * @param bytes the number of bytes write into the container.
+   */
+  public void incrWriteBytes(long bytes) {
+    this.writeBytes.addAndGet(bytes);
+  }
+
+  /**
+   * Get the number of writes into the container.
+   * @return the number of writes into the container.
+   */
+  public long getWriteCount() {
+    return writeCount.get();
+  }
+
+  /**
+   * Increase the number of writes into the container by 1.
+   */
+  public void incrWriteCount() {
+    this.writeCount.incrementAndGet();
+  }
+
+
 }

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerManagerImpl.java

@@ -22,13 +22,14 @@ import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
 import org.apache.commons.io.FileUtils;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.fs.StorageType;
 import org.apache.hadoop.hdds.scm.ScmConfigKeys;
 import org.apache.hadoop.hdds.scm.container.common.helpers
     .StorageContainerException;
 import org.apache.hadoop.hdfs.server.datanode.StorageLocation;
 import org.apache.hadoop.hdds.protocol.DatanodeDetails;
 import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
+import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos
+    .ContainerLifeCycleState;
 import org.apache.hadoop.hdds.protocol.proto
     .StorageContainerDatanodeProtocolProtos;
 import org.apache.hadoop.hdds.protocol.proto
@@ -39,8 +40,6 @@ import org.apache.hadoop.hdds.protocol.proto
     .StorageContainerDatanodeProtocolProtos.SCMNodeReport;
 import org.apache.hadoop.hdds.protocol.proto
     .StorageContainerDatanodeProtocolProtos.SCMStorageReport;
-import org.apache.hadoop.hdds.protocol.proto
-    .StorageContainerDatanodeProtocolProtos.StorageTypeProto;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.OzoneConsts;
@@ -116,7 +115,7 @@ public class ContainerManagerImpl implements ContainerManager {
 
   // TODO: consider primitive collection like eclipse-collections
   // to avoid autoboxing overhead
-  private final ConcurrentSkipListMap<Long, ContainerStatus>
+  private final ConcurrentSkipListMap<Long, ContainerData>
       containerMap = new ConcurrentSkipListMap<>();
 
   // Use a non-fair RW lock for better throughput, we may revisit this decision
@@ -246,19 +245,20 @@ public class ContainerManagerImpl implements ContainerManager {
         // when loading the info we get a null, this often means last time
         // SCM was ending up at some middle phase causing that the metadata
         // was not populated. Such containers are marked as inactive.
-        containerMap.put(containerID, new ContainerStatus(null));
+        ContainerData cData = new ContainerData(containerID, conf,
+            ContainerLifeCycleState.INVALID);
+        containerMap.put(containerID, cData);
         return;
       }
       containerData = ContainerData.getFromProtBuf(containerDataProto, conf);
 
-      ContainerStatus containerStatus = new ContainerStatus(containerData);
       // Initialize pending deletion blocks count in in-memory
       // container status.
       MetadataStore metadata = KeyUtils.getDB(containerData, conf);
       List<Map.Entry<byte[], byte[]>> underDeletionBlocks = metadata
           .getSequentialRangeKVs(null, Integer.MAX_VALUE,
               MetadataKeyFilters.getDeletingKeyFilter());
-      containerStatus.incrPendingDeletionBlocks(underDeletionBlocks.size());
+      containerData.incrPendingDeletionBlocks(underDeletionBlocks.size());
 
       List<Map.Entry<byte[], byte[]>> liveKeys = metadata
           .getRangeKVs(null, Integer.MAX_VALUE,
@@ -277,9 +277,9 @@ public class ContainerManagerImpl implements ContainerManager {
           return 0L;
         }
       }).sum();
-      containerStatus.setBytesUsed(bytesUsed);
+      containerData.setBytesUsed(bytesUsed);
 
-      containerMap.put(containerID, containerStatus);
+      containerMap.put(containerID, containerData);
     } catch (IOException ex) {
       LOG.error("read failed for file: {} ex: {}", containerName,
           ex.getMessage());
@@ -287,7 +287,9 @@ public class ContainerManagerImpl implements ContainerManager {
       // TODO : Add this file to a recovery Queue.
 
       // Remember that this container is busted and we cannot use it.
-      containerMap.put(containerID, new ContainerStatus(null));
+      ContainerData cData = new ContainerData(containerID, conf,
+          ContainerLifeCycleState.INVALID);
+      containerMap.put(containerID, cData);
       throw new StorageContainerException("Unable to read container info",
           UNABLE_TO_READ_METADATA_DB);
     } finally {
@@ -456,18 +458,19 @@ public class ContainerManagerImpl implements ContainerManager {
             UNCLOSED_CONTAINER_IO);
       }
 
-      ContainerStatus status = containerMap.get(containerID);
-      if (status == null) {
+      ContainerData containerData = containerMap.get(containerID);
+      if (containerData == null) {
         LOG.debug("No such container. ID: {}", containerID);
         throw new StorageContainerException("No such container. ID : " +
             containerID, CONTAINER_NOT_FOUND);
       }
-      if (status.getContainer() == null) {
+
+      if(!containerData.isValid()) {
         LOG.debug("Invalid container data. ID: {}", containerID);
         throw new StorageContainerException("Invalid container data. Name : " +
             containerID, CONTAINER_NOT_FOUND);
       }
-      ContainerUtils.removeContainer(status.getContainer(), conf, forceDelete);
+      ContainerUtils.removeContainer(containerData, conf, forceDelete);
       containerMap.remove(containerID);
     } catch (StorageContainerException e) {
       throw e;
@@ -509,7 +512,7 @@ public class ContainerManagerImpl implements ContainerManager {
 
     readLock();
     try {
-      ConcurrentNavigableMap<Long, ContainerStatus> map;
+      ConcurrentNavigableMap<Long, ContainerData> map;
       if (startContainerID == 0) {
         map = containerMap.tailMap(containerMap.firstKey(), true);
       } else {
@@ -517,9 +520,9 @@ public class ContainerManagerImpl implements ContainerManager {
       }
 
       int currentCount = 0;
-      for (ContainerStatus entry : map.values()) {
+      for (ContainerData entry : map.values()) {
         if (currentCount < count) {
-          data.add(entry.getContainer());
+          data.add(entry);
           currentCount++;
         } else {
           return;
@@ -546,7 +549,7 @@ public class ContainerManagerImpl implements ContainerManager {
       throw new StorageContainerException("Unable to find the container. ID: "
           + containerID, CONTAINER_NOT_FOUND);
     }
-    ContainerData cData = containerMap.get(containerID).getContainer();
+    ContainerData cData = containerMap.get(containerID);
     if (cData == null) {
       throw new StorageContainerException("Invalid container data. ID: "
           + containerID, CONTAINER_INTERNAL_ERROR);
@@ -584,8 +587,7 @@ public class ContainerManagerImpl implements ContainerManager {
     // I/O failure, this allows us to take quick action in case of container
     // issues.
 
-    ContainerStatus status = new ContainerStatus(containerData);
-    containerMap.put(containerID, status);
+    containerMap.put(containerID, containerData);
   }
 
   @Override
@@ -614,7 +616,7 @@ public class ContainerManagerImpl implements ContainerManager {
 
     try {
       Path location = locationManager.getContainerPath();
-      ContainerData orgData = containerMap.get(containerID).getContainer();
+      ContainerData orgData = containerMap.get(containerID);
       if (orgData == null) {
         // updating a invalid container
         throw new StorageContainerException("Update a container with invalid" +
@@ -652,8 +654,7 @@ public class ContainerManagerImpl implements ContainerManager {
       }
 
       // Update the in-memory map
-      ContainerStatus newStatus = new ContainerStatus(data);
-      containerMap.replace(containerID, newStatus);
+      containerMap.replace(containerID, data);
     } catch (IOException e) {
       // Restore the container file from backup
       if(containerFileBK != null && containerFileBK.exists() && deleted) {
@@ -699,17 +700,12 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public boolean isOpen(long containerID) throws StorageContainerException {
-    final ContainerStatus status = containerMap.get(containerID);
-    if (status == null) {
-      throw new StorageContainerException(
-          "Container status not found: " + containerID, CONTAINER_NOT_FOUND);
-    }
-    final ContainerData cData = status.getContainer();
-    if (cData == null) {
+    final ContainerData containerData = containerMap.get(containerID);
+    if (containerData == null) {
       throw new StorageContainerException(
           "Container not found: " + containerID, CONTAINER_NOT_FOUND);
     }
-    return cData.isOpen();
+    return containerData.isOpen();
   }
 
   /**
@@ -727,7 +723,7 @@ public class ContainerManagerImpl implements ContainerManager {
 
 
   @VisibleForTesting
-  public ConcurrentSkipListMap<Long, ContainerStatus> getContainerMap() {
+  public ConcurrentSkipListMap<Long, ContainerData> getContainerMap() {
     return containerMap;
   }
 
@@ -847,9 +843,9 @@ public class ContainerManagerImpl implements ContainerManager {
     // And we can never get the exact state since close might happen
     // after we iterate a point.
     return containerMap.entrySet().stream()
-        .filter(containerStatus ->
-            !containerStatus.getValue().getContainer().isOpen())
-        .map(containerStatus -> containerStatus.getValue().getContainer())
+        .filter(containerData ->
+            !containerData.getValue().isOpen())
+        .map(containerData -> containerData.getValue())
         .collect(Collectors.toList());
   }
 
@@ -865,7 +861,7 @@ public class ContainerManagerImpl implements ContainerManager {
     // No need for locking since containerMap is a ConcurrentSkipListMap
     // And we can never get the exact state since close might happen
     // after we iterate a point.
-    List<ContainerStatus> containers = containerMap.values().stream()
+    List<ContainerData> containers = containerMap.values().stream()
         .collect(Collectors.toList());
 
     ContainerReportsRequestProto.Builder crBuilder =
@@ -875,18 +871,17 @@ public class ContainerManagerImpl implements ContainerManager {
     crBuilder.setDatanodeDetails(datanodeDetails.getProtoBufMessage())
         .setType(ContainerReportsRequestProto.reportType.fullReport);
 
-    for (ContainerStatus container: containers) {
+    for (ContainerData container: containers) {
       StorageContainerDatanodeProtocolProtos.ContainerInfo.Builder ciBuilder =
           StorageContainerDatanodeProtocolProtos.ContainerInfo.newBuilder();
-      ciBuilder.setContainerID(container.getContainer().getContainerID())
-          .setSize(container.getContainer().getMaxSize())
-          .setUsed(container.getContainer().getBytesUsed())
-          .setKeyCount(container.getContainer().getKeyCount())
+      ciBuilder.setContainerID(container.getContainerID())
+          .setSize(container.getMaxSize())
+          .setUsed(container.getBytesUsed())
+          .setKeyCount(container.getKeyCount())
           .setReadCount(container.getReadCount())
           .setWriteCount(container.getWriteCount())
           .setReadBytes(container.getReadBytes())
-          .setWriteBytes(container.getWriteBytes())
-          .setContainerID(container.getContainer().getContainerID());
+          .setWriteBytes(container.getWriteBytes());
 
       crBuilder.addReports(ciBuilder.build());
     }
@@ -943,8 +938,8 @@ public class ContainerManagerImpl implements ContainerManager {
   public void incrPendingDeletionBlocks(int numBlocks, long containerId) {
     writeLock();
     try {
-      ContainerStatus status = containerMap.get(containerId);
-      status.incrPendingDeletionBlocks(numBlocks);
+      ContainerData cData = containerMap.get(containerId);
+      cData.incrPendingDeletionBlocks(numBlocks);
     } finally {
       writeUnlock();
     }
@@ -954,8 +949,8 @@ public class ContainerManagerImpl implements ContainerManager {
   public void decrPendingDeletionBlocks(int numBlocks, long containerId) {
     writeLock();
     try {
-      ContainerStatus status = containerMap.get(containerId);
-      status.decrPendingDeletionBlocks(numBlocks);
+      ContainerData cData = containerMap.get(containerId);
+      cData.decrPendingDeletionBlocks(numBlocks);
     } finally {
       writeUnlock();
     }
@@ -968,32 +963,37 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public void incrReadCount(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    status.incrReadCount();
+    ContainerData cData = containerMap.get(containerId);
+    cData.incrReadCount();
   }
 
   public long getReadCount(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.getReadCount();
+    ContainerData cData = containerMap.get(containerId);
+    return cData.getReadCount();
   }
 
   /**
-   * Increse the read counter for bytes read from the container.
+   * Increase the read counter for bytes read from the container.
    *
    * @param containerId - ID of the container.
    * @param readBytes     - bytes read from the container.
    */
   @Override
   public void incrReadBytes(long containerId, long readBytes) {
-    ContainerStatus status = containerMap.get(containerId);
-    status.incrReadBytes(readBytes);
+    ContainerData cData = containerMap.get(containerId);
+    cData.incrReadBytes(readBytes);
   }
 
+  /**
+   * Returns number of bytes read from the container.
+   * @param containerId
+   * @return
+   */
   public long getReadBytes(long containerId) {
     readLock();
     try {
-      ContainerStatus status = containerMap.get(containerId);
-      return status.getReadBytes();
+      ContainerData cData = containerMap.get(containerId);
+      return cData.getReadBytes();
     } finally {
       readUnlock();
     }
@@ -1006,13 +1006,13 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public void incrWriteCount(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    status.incrWriteCount();
+    ContainerData cData = containerMap.get(containerId);
+    cData.incrWriteCount();
   }
 
   public long getWriteCount(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.getWriteCount();
+    ContainerData cData = containerMap.get(containerId);
+    return cData.getWriteCount();
   }
 
   /**
@@ -1023,13 +1023,13 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public void incrWriteBytes(long containerId, long writeBytes) {
-    ContainerStatus status = containerMap.get(containerId);
-    status.incrWriteBytes(writeBytes);
+    ContainerData cData = containerMap.get(containerId);
+    cData.incrWriteBytes(writeBytes);
   }
 
   public long getWriteBytes(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.getWriteBytes();
+    ContainerData cData = containerMap.get(containerId);
+    return cData.getWriteBytes();
   }
 
   /**
@@ -1041,8 +1041,8 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public long incrBytesUsed(long containerId, long used) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.incrBytesUsed(used);
+    ContainerData cData = containerMap.get(containerId);
+    return cData.incrBytesUsed(used);
   }
 
   /**
@@ -1054,13 +1054,13 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public long decrBytesUsed(long containerId, long used) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.decrBytesUsed(used);
+    ContainerData cData = containerMap.get(containerId);
+    return cData.decrBytesUsed(used);
   }
 
   public long getBytesUsed(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.getBytesUsed();
+    ContainerData cData = containerMap.get(containerId);
+    return cData.getBytesUsed();
   }
 
   /**
@@ -1071,8 +1071,8 @@ public class ContainerManagerImpl implements ContainerManager {
    */
   @Override
   public long getNumKeys(long containerId) {
-    ContainerStatus status = containerMap.get(containerId);
-    return status.getNumKeys();  }
+    ContainerData cData = containerMap.get(containerId);
+    return cData.getKeyCount();  }
 
   /**
    * Get the container report state to send via HB to SCM.

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/ContainerStatus.java

@@ -1,217 +0,0 @@
-/**
- * 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.ozone.container.common.impl;
-
-import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
-
-import java.util.concurrent.atomic.AtomicLong;
-
-/**
- * This class represents the state of a container. if the
- * container reading encountered an error when we boot up we will post that
- * info to a recovery queue and keep the info in the containerMap.
- * <p/>
- * if and when the issue is fixed, the expectation is that this entry will be
- * deleted by the recovery thread from the containerMap and will insert entry
- * instead of modifying this class.
- */
-public class ContainerStatus {
-  private final ContainerData containerData;
-
-  /**
-   * Number of pending deletion blocks in container.
-   */
-  private int numPendingDeletionBlocks;
-
-  private AtomicLong readBytes;
-
-  private AtomicLong writeBytes;
-
-  private AtomicLong readCount;
-
-  private AtomicLong writeCount;
-
-  /**
-   * Creates a Container Status class.
-   *
-   * @param containerData - ContainerData.
-   */
-  ContainerStatus(ContainerData containerData) {
-    this.numPendingDeletionBlocks = 0;
-    this.containerData = containerData;
-    this.readCount = new AtomicLong(0L);
-    this.readBytes =  new AtomicLong(0L);
-    this.writeCount =  new AtomicLong(0L);
-    this.writeBytes =  new AtomicLong(0L);
-  }
-
-  /**
-   * Returns container if it is active. It is not active if we have had an
-   * error and we are waiting for the background threads to fix the issue.
-   *
-   * @return ContainerData.
-   */
-  public ContainerData getContainer() {
-    return containerData;
-  }
-
-  /**
-   * Increase the count of pending deletion blocks.
-   *
-   * @param numBlocks increment number
-   */
-  public void incrPendingDeletionBlocks(int numBlocks) {
-    this.numPendingDeletionBlocks += numBlocks;
-  }
-
-  /**
-   * Decrease the count of pending deletion blocks.
-   *
-   * @param numBlocks decrement number
-   */
-  public void decrPendingDeletionBlocks(int numBlocks) {
-    this.numPendingDeletionBlocks -= numBlocks;
-  }
-
-  /**
-   * Get the number of pending deletion blocks.
-   */
-  public int getNumPendingDeletionBlocks() {
-    return this.numPendingDeletionBlocks;
-  }
-
-  /**
-   * Get the number of bytes read from the container.
-   * @return the number of bytes read from the container.
-   */
-  public long getReadBytes() {
-    return readBytes.get();
-  }
-
-  /**
-   * Increase the number of bytes read from the container.
-   * @param bytes number of bytes read.
-   */
-  public void incrReadBytes(long bytes) {
-    this.readBytes.addAndGet(bytes);
-  }
-
-  /**
-   * Get the number of times the container is read.
-   * @return the number of times the container is read.
-   */
-  public long getReadCount() {
-    return readCount.get();
-  }
-
-  /**
-   * Increase the number of container read count by 1.
-   */
-  public void incrReadCount() {
-    this.readCount.incrementAndGet();
-  }
-
-  /**
-   * Get the number of bytes write into the container.
-   * @return the number of bytes write into the container.
-   */
-  public long getWriteBytes() {
-    return writeBytes.get();
-  }
-
-  /**
-   * Increase the number of bytes write into the container.
-   * @param bytes the number of bytes write into the container.
-   */
-  public void incrWriteBytes(long bytes) {
-    this.writeBytes.addAndGet(bytes);
-  }
-
-  /**
-   * Get the number of writes into the container.
-   * @return the number of writes into the container.
-   */
-  public long getWriteCount() {
-    return writeCount.get();
-  }
-
-  /**
-   * Increase the number of writes into the container by 1.
-   */
-  public void incrWriteCount() {
-    this.writeCount.incrementAndGet();
-  }
-
-  /**
-   * Get the number of bytes used by the container.
-   * @return the number of bytes used by the container.
-   */
-  public long getBytesUsed() {
-    return containerData.getBytesUsed();
-  }
-
-  /**
-   * Increase the number of bytes used by the container.
-   * @param used number of bytes used by the container.
-   * @return the current number of bytes used by the container afert increase.
-   */
-  public long incrBytesUsed(long used) {
-    return containerData.addBytesUsed(used);
-  }
-
-  /**
-   * Set the number of bytes used by the container.
-   * @param used the number of bytes used by the container.
-   */
-  public void setBytesUsed(long used) {
-    containerData.setBytesUsed(used);
-  }
-
-  /**
-   * Decrease the number of bytes used by the container.
-   * @param reclaimed the number of bytes reclaimed from the container.
-   * @return the current number of bytes used by the container after decrease.
-   */
-  public long decrBytesUsed(long reclaimed) {
-    return this.containerData.addBytesUsed(-1L * reclaimed);
-  }
-
-  /**
-   * Get the maximum container size.
-   * @return the maximum container size.
-   */
-  public long getMaxSize() {
-    return containerData.getMaxSize();
-  }
-
-  /**
-   * Set the maximum container size.
-   * @param size the maximum container size.
-   */
-  public void setMaxSize(long size) {
-    this.containerData.setMaxSize(size);
-  }
-
-  /**
-   * Get the number of keys in the container.
-   * @return the number of keys in the container.
-   */
-  public long getNumKeys() {
-    return containerData.getKeyCount();
-  }
-}

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/RandomContainerDeletionChoosingPolicy.java

@@ -41,24 +41,24 @@ public class RandomContainerDeletionChoosingPolicy
 
   @Override
   public List<ContainerData> chooseContainerForBlockDeletion(int count,
-      Map<Long, ContainerStatus> candidateContainers)
+      Map<Long, ContainerData> candidateContainers)
       throws StorageContainerException {
     Preconditions.checkNotNull(candidateContainers,
         "Internal assertion: candidate containers cannot be null");
 
     int currentCount = 0;
     List<ContainerData> result = new LinkedList<>();
-    ContainerStatus[] values = new ContainerStatus[candidateContainers.size()];
+    ContainerData[] values = new ContainerData[candidateContainers.size()];
     // to get a shuffle list
-    for (ContainerStatus entry : DFSUtil.shuffle(
+    for (ContainerData entry : DFSUtil.shuffle(
         candidateContainers.values().toArray(values))) {
       if (currentCount < count) {
-        result.add(entry.getContainer());
+        result.add(entry);
         currentCount++;
 
         LOG.debug("Select container {} for block deletion, "
             + "pending deletion blocks num: {}.",
-            entry.getContainer().getContainerID(),
+            entry.getContainerID(),
             entry.getNumPendingDeletionBlocks());
       } else {
         break;

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/TopNOrderedContainerDeletionChoosingPolicy.java

@@ -41,11 +41,11 @@ public class TopNOrderedContainerDeletionChoosingPolicy
   private static final Logger LOG =
       LoggerFactory.getLogger(TopNOrderedContainerDeletionChoosingPolicy.class);
 
-  /** customized comparator used to compare differentiate container status. **/
-  private static final Comparator<ContainerStatus> CONTAINER_STATUS_COMPARATOR
-      = new Comparator<ContainerStatus>() {
+  /** customized comparator used to compare differentiate container data. **/
+  private static final Comparator<ContainerData> CONTAINER_DATA_COMPARATOR
+      = new Comparator<ContainerData>() {
         @Override
-        public int compare(ContainerStatus c1, ContainerStatus c2) {
+        public int compare(ContainerData c1, ContainerData c2) {
           return Integer.compare(c2.getNumPendingDeletionBlocks(),
               c1.getNumPendingDeletionBlocks());
         }
@@ -53,28 +53,28 @@ public class TopNOrderedContainerDeletionChoosingPolicy
 
   @Override
   public List<ContainerData> chooseContainerForBlockDeletion(int count,
-      Map<Long, ContainerStatus> candidateContainers)
+      Map<Long, ContainerData> candidateContainers)
       throws StorageContainerException {
     Preconditions.checkNotNull(candidateContainers,
         "Internal assertion: candidate containers cannot be null");
 
     List<ContainerData> result = new LinkedList<>();
-    List<ContainerStatus> orderedList = new LinkedList<>();
+    List<ContainerData> orderedList = new LinkedList<>();
     orderedList.addAll(candidateContainers.values());
-    Collections.sort(orderedList, CONTAINER_STATUS_COMPARATOR);
+    Collections.sort(orderedList, CONTAINER_DATA_COMPARATOR);
 
     // get top N list ordered by pending deletion blocks' number
     int currentCount = 0;
-    for (ContainerStatus entry : orderedList) {
+    for (ContainerData entry : orderedList) {
       if (currentCount < count) {
         if (entry.getNumPendingDeletionBlocks() > 0) {
-          result.add(entry.getContainer());
+          result.add(entry);
           currentCount++;
 
           LOG.debug(
               "Select container {} for block deletion, "
                   + "pending deletion blocks num: {}.",
-              entry.getContainer().getContainerID(),
+              entry.getContainerID(),
               entry.getNumPendingDeletionBlocks());
         } else {
           LOG.debug("Stop looking for next container, there is no"

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/interfaces/ContainerDeletionChoosingPolicy.java

@@ -20,7 +20,6 @@ package org.apache.hadoop.ozone.container.common.interfaces;
 import org.apache.hadoop.hdds.scm.container.common.helpers
     .StorageContainerException;
 import org.apache.hadoop.ozone.container.common.helpers.ContainerData;
-import org.apache.hadoop.ozone.container.common.impl.ContainerStatus;
 
 import java.util.List;
 import java.util.Map;
@@ -41,6 +40,6 @@ public interface ContainerDeletionChoosingPolicy {
    * @throws StorageContainerException
    */
   List<ContainerData> chooseContainerForBlockDeletion(int count,
-      Map<Long, ContainerStatus> candidateContainers)
+      Map<Long, ContainerData> candidateContainers)
       throws StorageContainerException;
 }

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/container/common/impl/TestContainerPersistence.java

@@ -65,7 +65,6 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.ArrayList;
-import java.util.UUID;
 
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY;
 import static org.apache.hadoop.ozone.OzoneConsts.CONTAINER_ROOT_PREFIX;
@@ -191,23 +190,23 @@ public class TestContainerPersistence {
     containerManager.createContainer(data);
     Assert.assertTrue(containerManager.getContainerMap()
         .containsKey(testContainerID));
-    ContainerStatus status = containerManager
+    ContainerData cData = containerManager
         .getContainerMap().get(testContainerID);
 
-    Assert.assertNotNull(status.getContainer());
-    Assert.assertNotNull(status.getContainer().getContainerPath());
-    Assert.assertNotNull(status.getContainer().getDBPath());
+    Assert.assertNotNull(cData);
+    Assert.assertNotNull(cData.getContainerPath());
+    Assert.assertNotNull(cData.getDBPath());
 
 
-    Assert.assertTrue(new File(status.getContainer().getContainerPath())
+    Assert.assertTrue(new File(cData.getContainerPath())
         .exists());
 
-    Path meta = Paths.get(status.getContainer().getDBPath()).getParent();
+    Path meta = Paths.get(cData.getDBPath()).getParent();
     Assert.assertTrue(meta != null && Files.exists(meta));
 
     MetadataStore store = null;
     try {
-      store = KeyUtils.getDB(status.getContainer(), conf);
+      store = KeyUtils.getDB(cData, conf);
       Assert.assertNotNull(store);
     } finally {
       if (store != null) {
@@ -762,7 +761,7 @@ public class TestContainerPersistence {
 
     // Verify in-memory map
     ContainerData actualNewData = containerManager.getContainerMap()
-        .get(testContainerID).getContainer();
+        .get(testContainerID);
     Assert.assertEquals("shire_new",
         actualNewData.getAllMetadata().get("VOLUME"));
     Assert.assertEquals("bilbo_new",
@@ -805,7 +804,7 @@ public class TestContainerPersistence {
 
     // Verify in-memory map
     actualNewData = containerManager.getContainerMap()
-        .get(testContainerID).getContainer();
+        .get(testContainerID);
     Assert.assertEquals("shire_new_1",
         actualNewData.getAllMetadata().get("VOLUME"));
     Assert.assertEquals("bilbo_new_1",