diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/helpers/VolumeArgs.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/helpers/VolumeArgs.java
new file mode 100644
index 0000000000..472af65165
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/helpers/VolumeArgs.java
@@ -0,0 +1,140 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ksm.helpers;
+
+import com.google.common.base.Preconditions;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A class that encapsulates the createVolume Args.
+ */
+public final class VolumeArgs {
+  private final String adminName;
+  private final String ownerName;
+  private final String volume;
+  private final long quotaInBytes;
+  private final Map<String, String> extendedAttributes;
+
+  /**
+   * Private constructor, constructed via builder.
+   *
+   * @param adminName - Administrator name.
+   * @param ownerName - Volume owner's name
+   * @param volume - volume name
+   * @param quotaInBytes - Volume Quota in bytes.
+   * @param keyValueMap - keyValue map.
+   */
+  private VolumeArgs(String adminName, String ownerName, String volume,
+      long quotaInBytes, Map<String, String> keyValueMap) {
+    this.adminName = adminName;
+    this.ownerName = ownerName;
+    this.volume = volume;
+    this.quotaInBytes = quotaInBytes;
+    this.extendedAttributes = keyValueMap;
+  }
+
+  /**
+   * Returns the Admin Name.
+   *
+   * @return String.
+   */
+  public String getAdminName() {
+    return adminName;
+  }
+
+  /**
+   * Returns the owner Name.
+   *
+   * @return String
+   */
+  public String getOwnerName() {
+    return ownerName;
+  }
+
+  /**
+   * Returns the volume Name.
+   *
+   * @return String
+   */
+  public String getVolume() {
+    return volume;
+  }
+
+  /**
+   * Returns Quota in Bytes.
+   *
+   * @return long, Quota in bytes.
+   */
+  public long getQuotaInBytes() {
+    return quotaInBytes;
+  }
+
+  public Map<String, String> getExtendedAttributes() {
+    return extendedAttributes;
+  }
+
+  static class Builder {
+    private String adminName;
+    private String ownerName;
+    private String volume;
+    private long quotaInBytes;
+    private Map<String, String> extendedAttributes;
+
+    /**
+     * Constructs a builder.
+     */
+    Builder() {
+      extendedAttributes = new HashMap<>();
+    }
+
+    public void setAdminName(String adminName) {
+      this.adminName = adminName;
+    }
+
+    public void setOwnerName(String ownerName) {
+      this.ownerName = ownerName;
+    }
+
+    public void setVolume(String volume) {
+      this.volume = volume;
+    }
+
+    public void setQuotaInBytes(long quotaInBytes) {
+      this.quotaInBytes = quotaInBytes;
+    }
+
+    public void addMetadata(String key, String value) {
+      extendedAttributes.put(key, value); // overwrite if present.
+    }
+
+    /**
+     * Constructs a CreateVolumeArgument.
+     *
+     * @return CreateVolumeArgs.
+     */
+    public VolumeArgs build() {
+      Preconditions.checkNotNull(adminName);
+      Preconditions.checkNotNull(ownerName);
+      Preconditions.checkNotNull(volume);
+      return new VolumeArgs(adminName, ownerName, volume, quotaInBytes,
+          extendedAttributes);
+    }
+  }
+}
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/helpers/package-info.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/helpers/package-info.java
new file mode 100644
index 0000000000..8e48773105
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/helpers/package-info.java
@@ -0,0 +1,18 @@
+/**
+ * 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.ksm.helpers;
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/package-info.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/package-info.java
new file mode 100644
index 0000000000..5b208fa875
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/package-info.java
@@ -0,0 +1,21 @@
+/**
+ * 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.ksm;
+/**
+ This package contains client side protocol library to communicate with KSM.
+ */
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocol/KeyspaceManagerProtocol.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocol/KeyspaceManagerProtocol.java
new file mode 100644
index 0000000000..3a07d97de0
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocol/KeyspaceManagerProtocol.java
@@ -0,0 +1,98 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ksm.protocol;
+
+import org.apache.hadoop.ksm.helpers.VolumeArgs;
+
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * Protocol to talk to KSM.
+ */
+public interface KeyspaceManagerProtocol {
+
+  /**
+   * Creates a volume.
+   * @param args - Arguments to create Volume.
+   * @throws IOException
+   */
+  void createVolume(VolumeArgs args) throws IOException;
+
+  /**
+   * Changes the owner of a volume.
+   * @param volume  - Name of the volume.
+   * @param owner - Name of the owner.
+   * @throws IOException
+   */
+  void setOwner(String volume, String owner) throws IOException;
+
+  /**
+   * Changes the Quota on a volume.
+   * @param volume - Name of the volume.
+   * @param quota - Quota in bytes.
+   * @throws IOException
+   */
+  void setQuota(String volume, long quota) throws IOException;
+
+  /**
+   * Checks if the specified user can access this volume.
+   * @param volume - volume
+   * @param userName - user name
+   * @throws IOException
+   */
+  void checkVolumeAccess(String volume, String userName) throws IOException;
+
+  /**
+   * Gets the volume information.
+   * @param volume - Volume name.s
+   * @return VolumeArgs or exception is thrown.
+   * @throws IOException
+   */
+  VolumeArgs getVolumeinfo(String volume) throws IOException;
+
+  /**
+   * Deletes the an exisiting empty volume.
+   * @param volume - Name of the volume.
+   * @throws IOException
+   */
+  void deleteVolume(String volume) throws IOException;
+
+  /**
+   * Lists volume owned by a specific user.
+   * @param userName - user name
+   * @param prefix  - Filter prefix -- Return only entries that match this.
+   * @param prevKey - Previous key -- List starts from the next from the prevkey
+   * @param maxKeys - Max number of keys to return.
+   * @return List of Volumes.
+   * @throws IOException
+   */
+  List<VolumeArgs> listVolumeByUser(String userName, String prefix, String
+      prevKey, long maxKeys) throws IOException;
+
+  /**
+   * Lists volume all volumes in the cluster.
+   * @param prefix  - Filter prefix -- Return only entries that match this.
+   * @param prevKey - Previous key -- List starts from the next from the prevkey
+   * @param maxKeys - Max number of keys to return.
+   * @return List of Volumes.
+   * @throws IOException
+   */
+  List<VolumeArgs> listAllVolumes(String prefix, String
+      prevKey, long maxKeys) throws IOException;
+}
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocol/package-info.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocol/package-info.java
new file mode 100644
index 0000000000..d1d12dc34e
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocol/package-info.java
@@ -0,0 +1,19 @@
+/**
+ * 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.ksm.protocol;
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocolPB/KeySpaceManagerProtocolPB.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocolPB/KeySpaceManagerProtocolPB.java
new file mode 100644
index 0000000000..1490008d67
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocolPB/KeySpaceManagerProtocolPB.java
@@ -0,0 +1,33 @@
+/**
+ * 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.ksm.protocolPB;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.ipc.ProtocolInfo;
+import org.apache.hadoop.ozone.protocol.proto.KeySpaceManagerProtocolProtos.KeyspaceManagerService;
+
+/**
+ * Protocol used to communicate with KSM.
+ */
+@ProtocolInfo(protocolName =
+    "org.apache.hadoop.ozone.protocol.KeyspaceManagerProtocol",
+    protocolVersion = 1)
+@InterfaceAudience.Private
+public interface KeySpaceManagerProtocolPB
+    extends KeyspaceManagerService.BlockingInterface {
+}
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocolPB/package-info.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocolPB/package-info.java
new file mode 100644
index 0000000000..5dfa5ea083
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/ksm/protocolPB/package-info.java
@@ -0,0 +1,19 @@
+/**
+ * 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.ksm.protocolPB;
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/ScmConfigKeys.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/ScmConfigKeys.java
index e779247652..03f9c82461 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/ScmConfigKeys.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/ScmConfigKeys.java
@@ -152,6 +152,7 @@ public final class ScmConfigKeys {
       "ozone.scm.container.provision_batch_size";
   public static final int OZONE_SCM_CONTAINER_PROVISION_BATCH_SIZE_DEFAULT = 10;
 
+
   /**
    * Never constructed.
    */
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/Pipeline.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/Pipeline.java
index 4456138b2a..2ebc1e62c9 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/Pipeline.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/container/common/helpers/Pipeline.java
@@ -19,7 +19,7 @@
 package org.apache.hadoop.scm.container.common.helpers;
 
 import com.google.common.base.Preconditions;
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
 import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos;
 
@@ -60,7 +60,7 @@ public Pipeline(String leaderID) {
    * @param pipeline - ProtoBuf definition for the pipeline.
    * @return Pipeline Object
    */
-  public static Pipeline getFromProtoBuf(ContainerProtos.Pipeline pipeline) {
+  public static Pipeline getFromProtoBuf(OzoneProtos.Pipeline pipeline) {
     Preconditions.checkNotNull(pipeline);
     Pipeline newPipeline = new Pipeline(pipeline.getLeaderID());
     for (HdfsProtos.DatanodeIDProto dataID : pipeline.getMembersList()) {
@@ -104,9 +104,9 @@ public List<DatanodeID> getMachines() {
    *
    * @return Protobuf message
    */
-  public ContainerProtos.Pipeline getProtobufMessage() {
-    ContainerProtos.Pipeline.Builder builder =
-        ContainerProtos.Pipeline.newBuilder();
+  public OzoneProtos.Pipeline getProtobufMessage() {
+    OzoneProtos.Pipeline.Builder builder =
+        OzoneProtos.Pipeline.newBuilder();
     for (DatanodeID datanode : datanodes.values()) {
       builder.addMembers(datanode.getProtoBufMessage());
     }
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/storage/ChunkOutputStream.java b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/storage/ChunkOutputStream.java
index 962ca6b3c4..d93d2cf620 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/storage/ChunkOutputStream.java
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/scm/storage/ChunkOutputStream.java
@@ -30,7 +30,7 @@
 
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.ChunkInfo;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.KeyData;
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.KeyValue;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos.KeyValue;
 import org.apache.hadoop.scm.XceiverClientManager;
 import org.apache.hadoop.scm.XceiverClientSpi;
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/DatanodeContainerProtocol.proto b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/DatanodeContainerProtocol.proto
index 2d018ee529..012ff1dedb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/DatanodeContainerProtocol.proto
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/DatanodeContainerProtocol.proto
@@ -29,6 +29,7 @@ option java_outer_classname = "ContainerProtos";
 option java_generate_equals_and_hash = true;
 package hadoop.hdfs.ozone;
 import "hdfs.proto";
+import "Ozone.proto";
 
 /**
  * Commands that are used to manipulate the state of containers on a datanode.
@@ -190,17 +191,7 @@ message ContainerCommandResponseProto {
 
 }
 
-// A pipeline is composed of one or more datanodes that back a container.
-message Pipeline {
-  required string leaderID = 1;
-  repeated DatanodeIDProto members = 2;
-  required string containerName = 3;
-}
 
-message KeyValue {
-  required string key = 1;
-  optional string value = 2;
-}
 
 message ContainerData {
   required string name = 1;
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/KeySpaceManagerProtocol.proto b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/KeySpaceManagerProtocol.proto
new file mode 100644
index 0000000000..3ac25b8874
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/KeySpaceManagerProtocol.proto
@@ -0,0 +1,189 @@
+/**
+ * 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.
+ */
+
+/**
+ * These .proto interfaces are private and unstable.
+ * Please see http://wiki.apache.org/hadoop/Compatibility
+ * for what changes are allowed for a *unstable* .proto interface.
+ */
+
+option java_package = "org.apache.hadoop.ozone.protocol.proto";
+option java_outer_classname = "KeySpaceManagerProtocolProtos";
+option java_generic_services = true;
+option java_generate_equals_and_hash = true;
+package hadoop.hdfs.ozone;
+
+/**
+This is file contains the protocol to communicate with
+Ozone key space manager. Ozone KSM manages the namespace for ozone.
+This is similar to Namenode for Ozone.
+*/
+
+import "Ozone.proto";
+
+enum Status {
+    OK = 1;
+    VOLUME_NOT_UNIQUE = 2;
+    VOLUME_NOT_FOUND = 3;
+    VOLUME_NOT_EMPTY = 4;
+    USER_NOT_FOUND = 5;
+    ACCESS_DENIED = 6;
+}
+
+
+message VolumeInfo {
+    required string adminName = 1;
+    required string ownerName = 2;
+    required string volume = 3;
+    optional uint64 quotaInBytes = 4;
+    repeated KeyValue metadata = 5;
+}
+
+/**
+    Creates a volume
+*/
+message CreateVolumeRequest {
+    required VolumeInfo volumeInfo = 1;
+}
+
+message CreateVolumeResponse {
+
+    required Status status = 1;
+}
+
+/**
+    Changes the Volume Properties -- like ownership and quota for a volume.
+*/
+message SetVolumePropertyRequest {
+    required string volumeName = 1;
+    optional string ownerName = 2;
+    optional uint64 quotaInBytes = 3;
+}
+
+message SetVolumePropertyResponse {
+    required Status status = 1;
+}
+
+/**
+    Checks if a specified user has access to the volume.
+*/
+message CheckVolumeAccessRequest {
+    required string volumeName = 1;
+    required string userName = 2;
+}
+
+message CheckVolumeAccessResponse {
+
+    required Status status = 1;
+}
+
+
+/**
+    Returns information about a volume.
+*/
+
+message InfoVolumeRequest {
+    required string volumeName = 1;
+}
+
+message InfoVolumeResponse {
+    required Status status = 1;
+    optional VolumeInfo volumeInfo = 2;
+
+}
+
+/**
+    Deletes an existing volume.
+*/
+message DeleteVolumeRequest {
+    required string volumeName = 1;
+}
+
+message DeleteVolumeResponse {
+    required Status status = 1;
+}
+
+
+/**
+    List Volumes -- List all volumes in the cluster or by user.
+*/
+
+message ListVolumeRequest {
+    enum Scope {
+        USER_VOLUMES = 1;   // User volumes -- called by user
+        VOLUMES_BY_USER = 2; // User volumes - called by Admin
+        VOLUMES_BY_CLUSTER = 3; // All volumes in the cluster
+    }
+    required Scope scope = 1;
+    required string volumeName = 2;
+    optional string userName = 3;
+    optional string prefix = 4;
+    optional string prevKey = 5;
+    optional uint64 maxKeys = 6;
+}
+
+message ListVolumeResponse {
+    enum Status {
+        OK = 1;
+        ACCESS_DENIED = 2;
+        REQUIRED_ARG_MISSING = 3;
+    }
+    required Status status = 1;
+    repeated VolumeInfo volumeInfo = 2;
+}
+
+/**
+ The KSM service that takes care of Ozone namespace.
+*/
+service KeyspaceManagerService {
+
+    /**
+        Creates a Volume.
+    */
+    rpc createVolume(CreateVolumeRequest)
+        returns(CreateVolumeResponse);
+
+    /**
+        Allows modificiation of volume properties.
+    */
+    rpc setVolumeProperty(SetVolumePropertyRequest)
+        returns (SetVolumePropertyResponse);
+
+    /**
+        Checks if the specified volume is accesible by the specified user.
+    */
+    rpc checkVolumeAccess(CheckVolumeAccessRequest)
+        returns (CheckVolumeAccessResponse);
+
+    /**
+        Gets Volume information.
+    */
+    rpc infoVolume(InfoVolumeRequest)
+        returns(InfoVolumeResponse);
+    /**
+        Deletes a volume if it is empty.
+    */
+    rpc deleteVolume(DeleteVolumeRequest)
+        returns (DeleteVolumeResponse);
+
+    /**
+        Lists Volumes
+    */
+    rpc listVolumes(ListVolumeRequest)
+        returns (ListVolumeResponse);
+}
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/Ozone.proto b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/Ozone.proto
new file mode 100644
index 0000000000..740038ae9f
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/Ozone.proto
@@ -0,0 +1,43 @@
+/**
+ * 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.
+ */
+
+/**
+ * These .proto interfaces are private and unstable.
+ * Please see http://wiki.apache.org/hadoop/Compatibility
+ * for what changes are allowed for a *unstable* .proto interface.
+ */
+
+option java_package = "org.apache.hadoop.ozone.protocol.proto";
+option java_outer_classname = "OzoneProtos";
+option java_generic_services = true;
+option java_generate_equals_and_hash = true;
+package hadoop.hdfs.ozone;
+import "hdfs.proto";
+
+
+// A pipeline is composed of one or more datanodes that back a container.
+message Pipeline {
+    required string leaderID = 1;
+    repeated DatanodeIDProto members = 2;
+    required string containerName = 3;
+}
+
+message KeyValue {
+    required string key = 1;
+    optional string value = 2;
+}
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/StorageContainerLocationProtocol.proto b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/StorageContainerLocationProtocol.proto
index 8dfeb8b4ba..772db2b7b3 100644
--- a/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/StorageContainerLocationProtocol.proto
+++ b/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/StorageContainerLocationProtocol.proto
@@ -29,7 +29,7 @@ option java_generate_equals_and_hash = true;
 package hadoop.hdfs;
 
 import "hdfs.proto";
-import "DatanodeContainerProtocol.proto";
+import "Ozone.proto";
 
 /**
  * keys - batch of object keys to find
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/OzoneClientUtils.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/OzoneClientUtils.java
index 908cc44eb8..79275ebd0e 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/OzoneClientUtils.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/OzoneClientUtils.java
@@ -35,6 +35,10 @@
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
+import static org.apache.hadoop.ozone.ksm.KSMConfigKeys.OZONE_KSM_ADDRESS_KEY;
+import static org.apache.hadoop.ozone.ksm.KSMConfigKeys
+    .OZONE_KSM_BIND_HOST_DEFAULT;
+import static org.apache.hadoop.ozone.ksm.KSMConfigKeys.OZONE_KSM_PORT_DEFAULT;
 import static org.apache.hadoop.scm.ScmConfigKeys
     .OZONE_SCM_DEADNODE_INTERVAL_DEFAULT;
 import static org.apache.hadoop.scm.ScmConfigKeys
@@ -224,6 +228,26 @@ public static InetSocketAddress getScmDataNodeBindAddress(
             port.or(ScmConfigKeys.OZONE_SCM_DATANODE_PORT_DEFAULT));
   }
 
+
+  /**
+   * Retrieve the socket address that is used by KSM.
+   * @param conf
+   * @return Target InetSocketAddress for the SCM service endpoint.
+   */
+  public static InetSocketAddress getKsmAddress(
+      Configuration conf) {
+    final Optional<String> host = getHostNameFromConfigKeys(conf,
+        OZONE_KSM_ADDRESS_KEY);
+
+    // If no port number is specified then we'll just try the defaultBindPort.
+    final Optional<Integer> port = getPortNumberFromConfigKeys(conf,
+        OZONE_KSM_ADDRESS_KEY);
+
+    return NetUtils.createSocketAddr(
+        host.or(OZONE_KSM_BIND_HOST_DEFAULT) + ":" +
+            port.or(OZONE_KSM_PORT_DEFAULT));
+  }
+
   /**
    * Retrieve the hostname, trying the supplied config keys in order.
    * Each config value may be absent, or if present in the format
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ChunkInfo.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ChunkInfo.java
index 7a3d4494d7..690e3b59c1 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ChunkInfo.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ChunkInfo.java
@@ -20,6 +20,7 @@
 
 import com.google.common.base.Preconditions;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos;
 
 import java.io.IOException;
 import java.util.Map;
@@ -110,8 +111,8 @@ public ContainerProtos.ChunkInfo getProtoBufMessage() {
     }
 
     for (Map.Entry<String, String> entry : metadata.entrySet()) {
-      ContainerProtos.KeyValue.Builder keyValBuilder =
-          ContainerProtos.KeyValue.newBuilder();
+      OzoneProtos.KeyValue.Builder keyValBuilder =
+          OzoneProtos.KeyValue.newBuilder();
       builder.addMetadata(keyValBuilder.setKey(entry.getKey())
           .setValue(entry.getValue()).build());
     }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java
index 2f26649acb..1b70b1b323 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/ContainerData.java
@@ -20,6 +20,7 @@
 
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos;
 import org.apache.hadoop.util.Time;
 
 import java.io.IOException;
@@ -113,8 +114,8 @@ public ContainerProtos.ContainerData getProtoBufMessage() {
     builder.setOpen(this.isOpen());
 
     for (Map.Entry<String, String> entry : metadata.entrySet()) {
-      ContainerProtos.KeyValue.Builder keyValBuilder =
-          ContainerProtos.KeyValue.newBuilder();
+      OzoneProtos.KeyValue.Builder keyValBuilder =
+          OzoneProtos.KeyValue.newBuilder();
       builder.addMetadata(keyValBuilder.setKey(entry.getKey())
           .setValue(entry.getValue()).build());
     }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/KeyData.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/KeyData.java
index 289dbe48fe..590513eeb8 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/KeyData.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/container/common/helpers/KeyData.java
@@ -18,6 +18,7 @@
 package org.apache.hadoop.ozone.container.common.helpers;
 
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos;
 
 import java.io.IOException;
 import java.util.Collections;
@@ -81,8 +82,8 @@ public ContainerProtos.KeyData getProtoBufMessage() {
     builder.setName(this.getKeyName());
     builder.addAllChunks(this.chunks);
     for (Map.Entry<String, String> entry : metadata.entrySet()) {
-      ContainerProtos.KeyValue.Builder keyValBuilder =
-          ContainerProtos.KeyValue.newBuilder();
+      OzoneProtos.KeyValue.Builder keyValBuilder =
+          OzoneProtos.KeyValue.newBuilder();
       builder.addMetadata(keyValBuilder.setKey(entry.getKey())
           .setValue(entry.getValue()).build());
     }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KSMConfigKeys.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KSMConfigKeys.java
new file mode 100644
index 0000000000..a23d47ba12
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KSMConfigKeys.java
@@ -0,0 +1,40 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ksm;
+
+/**
+ * KSM Constants.
+ */
+public final class KSMConfigKeys {
+  /**
+   * Never constructed.
+   */
+  private KSMConfigKeys() {
+  }
+
+
+  public static final String OZONE_KSM_HANDLER_COUNT_KEY =
+      "ozone.scm.handler.count.key";
+  public static final int OZONE_KSM_HANDLER_COUNT_DEFAULT = 200;
+
+  public static final String OZONE_KSM_ADDRESS_KEY =
+      "ozone.ksm.address";
+  public static final String OZONE_KSM_BIND_HOST_DEFAULT =
+      "0.0.0.0";
+  public static final int OZONE_KSM_PORT_DEFAULT = 9862;
+}
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KeySpaceManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KeySpaceManager.java
new file mode 100644
index 0000000000..725088534d
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/KeySpaceManager.java
@@ -0,0 +1,289 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ksm;
+
+import com.google.protobuf.BlockingService;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.hdfs.DFSUtil;
+import org.apache.hadoop.ipc.ProtobufRpcEngine;
+import org.apache.hadoop.ipc.RPC;
+import org.apache.hadoop.ksm.helpers.VolumeArgs;
+import org.apache.hadoop.ksm.protocol.KeyspaceManagerProtocol;
+import org.apache.hadoop.ksm.protocolPB.KeySpaceManagerProtocolPB;
+import org.apache.hadoop.ozone.OzoneClientUtils;
+import org.apache.hadoop.ozone.OzoneConfiguration;
+import org.apache.hadoop.ozone.protocolPB
+    .KeyspaceManagerProtocolServerSideTranslatorPB;
+import org.apache.hadoop.ozone.scm.StorageContainerManager;
+import org.apache.hadoop.util.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.util.List;
+
+import static org.apache.hadoop.ozone.ksm.KSMConfigKeys.OZONE_KSM_ADDRESS_KEY;
+import static org.apache.hadoop.ozone.ksm.KSMConfigKeys
+    .OZONE_KSM_HANDLER_COUNT_DEFAULT;
+import static org.apache.hadoop.ozone.ksm.KSMConfigKeys
+    .OZONE_KSM_HANDLER_COUNT_KEY;
+import static org.apache.hadoop.ozone.protocol.proto.KeySpaceManagerProtocolProtos
+    .KeyspaceManagerService.newReflectiveBlockingService;
+import static org.apache.hadoop.util.ExitUtil.terminate;
+
+/**
+ * Ozone Keyspace manager is the metadata manager of ozone.
+ */
+@InterfaceAudience.LimitedPrivate({"HDFS", "CBLOCK", "OZONE", "HBASE"})
+public class KeySpaceManager implements KeyspaceManagerProtocol {
+  // TODO: Support JMX
+  private static final Logger LOG =
+      LoggerFactory.getLogger(KeySpaceManager.class);
+
+  private final RPC.Server ksmRpcServer;
+  private final InetSocketAddress ksmRpcAddress;
+
+  public KeySpaceManager(OzoneConfiguration conf) throws IOException {
+    final int handlerCount = conf.getInt(OZONE_KSM_HANDLER_COUNT_KEY,
+        OZONE_KSM_HANDLER_COUNT_DEFAULT);
+
+    RPC.setProtocolEngine(conf, KeySpaceManagerProtocolPB.class,
+        ProtobufRpcEngine.class);
+
+    BlockingService ksmService = newReflectiveBlockingService(
+        new KeyspaceManagerProtocolServerSideTranslatorPB(this));
+    final InetSocketAddress ksmNodeRpcAddr = OzoneClientUtils.
+        getKsmAddress(conf);
+    ksmRpcServer = startRpcServer(conf, ksmNodeRpcAddr,
+        KeySpaceManagerProtocolPB.class, ksmService,
+        handlerCount);
+    ksmRpcAddress = updateListenAddress(conf,
+        OZONE_KSM_ADDRESS_KEY, ksmNodeRpcAddr, ksmRpcServer);
+
+    //TODO : Add call to register MXBean for JMX.
+  }
+
+  /**
+   * Starts an RPC server, if configured.
+   *
+   * @param conf configuration
+   * @param addr configured address of RPC server
+   * @param protocol RPC protocol provided by RPC server
+   * @param instance RPC protocol implementation instance
+   * @param handlerCount RPC server handler count
+   *
+   * @return RPC server
+   * @throws IOException if there is an I/O error while creating RPC server
+   */
+  private static RPC.Server startRpcServer(OzoneConfiguration conf,
+      InetSocketAddress addr, Class<?> protocol, BlockingService instance,
+      int handlerCount) throws IOException {
+    RPC.Server rpcServer = new RPC.Builder(conf)
+        .setProtocol(protocol)
+        .setInstance(instance)
+        .setBindAddress(addr.getHostString())
+        .setPort(addr.getPort())
+        .setNumHandlers(handlerCount)
+        .setVerbose(false)
+        .setSecretManager(null)
+        .build();
+
+    DFSUtil.addPBProtocol(conf, protocol, instance, rpcServer);
+    return rpcServer;
+  }
+
+  /**
+   * Main entry point for starting KeySpaceManager.
+   *
+   * @param argv arguments
+   * @throws IOException if startup fails due to I/O error
+   */
+  public static void main(String[] argv) throws IOException {
+    StringUtils.startupShutdownMessage(StorageContainerManager.class,
+        argv, LOG);
+    try {
+      KeySpaceManager ksm = new KeySpaceManager(new OzoneConfiguration());
+      ksm.start();
+      ksm.join();
+    } catch (Throwable t) {
+      LOG.error("Failed to start the KeyspaceManager.", t);
+      terminate(1, t);
+    }
+  }
+
+  /**
+   * Builds a message for logging startup information about an RPC server.
+   *
+   * @param description RPC server description
+   * @param addr RPC server listening address
+   * @return server startup message
+   */
+  private static String buildRpcServerStartMessage(String description,
+      InetSocketAddress addr) {
+    return addr != null ? String.format("%s is listening at %s",
+        description, addr.toString()) :
+        String.format("%s not started", description);
+  }
+
+  /**
+   * After starting an RPC server, updates configuration with the actual
+   * listening address of that server. The listening address may be different
+   * from the configured address if, for example, the configured address uses
+   * port 0 to request use of an ephemeral port.
+   *
+   * @param conf configuration to update
+   * @param rpcAddressKey configuration key for RPC server address
+   * @param addr configured address
+   * @param rpcServer started RPC server.
+   */
+  private static InetSocketAddress updateListenAddress(OzoneConfiguration conf,
+      String rpcAddressKey, InetSocketAddress addr, RPC.Server rpcServer) {
+    InetSocketAddress listenAddr = rpcServer.getListenerAddress();
+    InetSocketAddress updatedAddr = new InetSocketAddress(
+        addr.getHostString(), listenAddr.getPort());
+    conf.set(rpcAddressKey,
+        listenAddr.getHostString() + ":" + listenAddr.getPort());
+    return updatedAddr;
+  }
+
+  /**
+   * Start service.
+   */
+  public void start() {
+    LOG.info(buildRpcServerStartMessage("KeyspaceManager RPC server",
+        ksmRpcAddress));
+    ksmRpcServer.start();
+  }
+
+  /**
+   * Wait until service has completed shutdown.
+   */
+  public void join() {
+    try {
+      ksmRpcServer.join();
+    } catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      LOG.info("Interrupted during KeyspaceManager join.");
+    }
+  }
+
+  /**
+   * Creates a volume.
+   *
+   * @param args - Arguments to create Volume.
+   * @throws IOException
+   */
+  @Override
+  public void createVolume(VolumeArgs args) throws IOException {
+
+  }
+
+  /**
+   * Changes the owner of a volume.
+   *
+   * @param volume - Name of the volume.
+   * @param owner - Name of the owner.
+   * @throws IOException
+   */
+  @Override
+  public void setOwner(String volume, String owner) throws IOException {
+
+  }
+
+  /**
+   * Changes the Quota on a volume.
+   *
+   * @param volume - Name of the volume.
+   * @param quota - Quota in bytes.
+   * @throws IOException
+   */
+  @Override
+  public void setQuota(String volume, long quota) throws IOException {
+
+  }
+
+  /**
+   * Checks if the specified user can access this volume.
+   *
+   * @param volume - volume
+   * @param userName - user name
+   * @throws IOException
+   */
+  @Override
+  public void checkVolumeAccess(String volume, String userName) throws
+      IOException {
+
+  }
+
+  /**
+   * Gets the volume information.
+   *
+   * @param volume - Volume name.s
+   * @return VolumeArgs or exception is thrown.
+   * @throws IOException
+   */
+  @Override
+  public VolumeArgs getVolumeinfo(String volume) throws IOException {
+    return null;
+  }
+
+  /**
+   * Deletes the an exisiting empty volume.
+   *
+   * @param volume - Name of the volume.
+   * @throws IOException
+   */
+  @Override
+  public void deleteVolume(String volume) throws IOException {
+
+  }
+
+  /**
+   * Lists volume owned by a specific user.
+   *
+   * @param userName - user name
+   * @param prefix - Filter prefix -- Return only entries that match this.
+   * @param prevKey - Previous key -- List starts from the next from the
+   * prevkey
+   * @param maxKeys - Max number of keys to return.
+   * @return List of Volumes.
+   * @throws IOException
+   */
+  @Override
+  public List<VolumeArgs> listVolumeByUser(String userName, String prefix,
+      String prevKey, long maxKeys) throws IOException {
+    return null;
+  }
+
+  /**
+   * Lists volume all volumes in the cluster.
+   *
+   * @param prefix - Filter prefix -- Return only entries that match this.
+   * @param prevKey - Previous key -- List starts from the next from the
+   * prevkey
+   * @param maxKeys - Max number of keys to return.
+   * @return List of Volumes.
+   * @throws IOException
+   */
+  @Override
+  public List<VolumeArgs> listAllVolumes(String prefix, String prevKey, long
+      maxKeys) throws IOException {
+    return null;
+  }
+}
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/package-info.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/package-info.java
new file mode 100644
index 0000000000..09d9f32635
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/ksm/package-info.java
@@ -0,0 +1,21 @@
+/**
+ * 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.ksm;
+/*
+ This package contains the keyspace manager classes.
+ */
\ No newline at end of file
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocol/VersionResponse.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocol/VersionResponse.java
index cf742ae52e..8d8f4f1e97 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocol/VersionResponse.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocol/VersionResponse.java
@@ -1,3 +1,4 @@
+
 /**
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
@@ -18,7 +19,7 @@
 
 package org.apache.hadoop.ozone.protocol;
 
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.KeyValue;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos.KeyValue;
 import org.apache.hadoop.ozone.protocol.proto
     .StorageContainerDatanodeProtocolProtos.SCMVersionResponseProto;
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocolPB/KeyspaceManagerProtocolServerSideTranslatorPB.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocolPB/KeyspaceManagerProtocolServerSideTranslatorPB.java
new file mode 100644
index 0000000000..0725d25707
--- /dev/null
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/protocolPB/KeyspaceManagerProtocolServerSideTranslatorPB.java
@@ -0,0 +1,89 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.protocolPB;
+
+import com.google.protobuf.RpcController;
+import com.google.protobuf.ServiceException;
+import org.apache.hadoop.ksm.protocol.KeyspaceManagerProtocol;
+import org.apache.hadoop.ksm.protocolPB.KeySpaceManagerProtocolPB;
+import org.apache.hadoop.ozone.protocol.proto.KeySpaceManagerProtocolProtos;
+
+/**
+ * This class is the server-side translator that forwards requests received on
+ * {@link org.apache.hadoop.ksm.protocolPB.KeySpaceManagerProtocolPB} to the
+ * KeyspaceManagerService server implementation.
+ */
+public class KeyspaceManagerProtocolServerSideTranslatorPB implements
+    KeySpaceManagerProtocolPB {
+  private final KeyspaceManagerProtocol impl;
+
+  /**
+   * Constructs an instance of the server handler.
+   *
+   * @param impl KeySpaceManagerProtocolPB
+   */
+  public KeyspaceManagerProtocolServerSideTranslatorPB(
+      KeyspaceManagerProtocol impl) {
+    this.impl = impl;
+  }
+
+  @Override
+  public KeySpaceManagerProtocolProtos.CreateVolumeResponse createVolume(
+      RpcController controller, KeySpaceManagerProtocolProtos
+      .CreateVolumeRequest
+      request) throws ServiceException {
+    return null;
+  }
+
+  @Override
+  public KeySpaceManagerProtocolProtos.SetVolumePropertyResponse
+      setVolumeProperty(RpcController controller, KeySpaceManagerProtocolProtos
+      .SetVolumePropertyRequest request) throws ServiceException {
+    return null;
+  }
+
+  @Override
+  public KeySpaceManagerProtocolProtos.CheckVolumeAccessResponse
+      checkVolumeAccess(RpcController controller, KeySpaceManagerProtocolProtos
+      .CheckVolumeAccessRequest request) throws ServiceException {
+    return null;
+  }
+
+  @Override
+  public KeySpaceManagerProtocolProtos.InfoVolumeResponse infoVolume(
+      RpcController controller,
+      KeySpaceManagerProtocolProtos.InfoVolumeRequest request)
+      throws ServiceException {
+    return null;
+  }
+
+  @Override
+  public KeySpaceManagerProtocolProtos.DeleteVolumeResponse deleteVolume(
+      RpcController controller, KeySpaceManagerProtocolProtos
+      .DeleteVolumeRequest
+      request) throws ServiceException {
+    return null;
+  }
+
+  @Override
+  public KeySpaceManagerProtocolProtos.ListVolumeResponse listVolumes(
+      RpcController controller,
+      KeySpaceManagerProtocolProtos.ListVolumeRequest request)
+      throws ServiceException {
+    return null;
+  }
+}
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/cli/SQLCLI.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/cli/SQLCLI.java
index 8b94e9672b..d18aca80eb 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/cli/SQLCLI.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/cli/SQLCLI.java
@@ -26,8 +26,8 @@
 import org.apache.hadoop.conf.Configured;
 import org.apache.hadoop.hdfs.DFSUtil;
 import org.apache.hadoop.hdfs.DFSUtilClient;
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.Pipeline;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos.Pipeline;
 import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos;
 import org.apache.hadoop.util.Tool;
 import org.apache.hadoop.util.ToolRunner;
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/container/ContainerMapping.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/container/ContainerMapping.java
index cf0076c97f..c2b74c6ba0 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/container/ContainerMapping.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/scm/container/ContainerMapping.java
@@ -1,3 +1,4 @@
+
 /**
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with this
@@ -19,7 +20,7 @@
 
 import com.google.common.base.Preconditions;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
 import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.OzoneConsts;
@@ -172,7 +173,7 @@ public Pipeline getContainer(final String containerName) throws IOException {
             containerName);
       }
       pipeline = Pipeline.getFromProtoBuf(
-          ContainerProtos.Pipeline.PARSER.parseFrom(pipelineBytes));
+          OzoneProtos.Pipeline.PARSER.parseFrom(pipelineBytes));
       return pipeline;
     } finally {
       lock.unlock();
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/OzoneContainerTranslation.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/OzoneContainerTranslation.java
index 9333fe6d59..18ade6e103 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/OzoneContainerTranslation.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/ozone/web/storage/OzoneContainerTranslation.java
@@ -22,7 +22,7 @@
 
 import org.apache.hadoop.fs.StorageType;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.KeyData;
-import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos.KeyValue;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos.KeyValue;
 import org.apache.hadoop.ozone.OzoneConsts.Versioning;
 import org.apache.hadoop.ozone.web.request.OzoneQuota;
 import org.apache.hadoop.ozone.web.response.BucketInfo;
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto b/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
index 1ec0d7fceb..0183baef42 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/CBlockClientServerProtocol.proto
@@ -27,7 +27,7 @@ option java_generic_services = true;
 option java_generate_equals_and_hash = true;
 package hadoop.cblock;
 
-import "DatanodeContainerProtocol.proto";
+import "Ozone.proto";
 
 /**
 * This message is sent from CBlock client side to CBlock server to
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/StorageContainerDatanodeProtocol.proto b/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/StorageContainerDatanodeProtocol.proto
index db814c021f..38c6dd16f4 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/StorageContainerDatanodeProtocol.proto
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/StorageContainerDatanodeProtocol.proto
@@ -38,7 +38,7 @@ import "HdfsServer.proto";
 
 import "DatanodeProtocol.proto";
 
-import "DatanodeContainerProtocol.proto";
+import "Ozone.proto";
 
 
 /**
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/TestOzoneClientUtils.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/TestOzoneClientUtils.java
index aef53e90a5..a5dbea72df 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/TestOzoneClientUtils.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/TestOzoneClientUtils.java
@@ -19,6 +19,7 @@
 package org.apache.hadoop.ozone;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.ozone.ksm.KSMConfigKeys;
 import org.apache.hadoop.scm.ScmConfigKeys;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -321,4 +322,29 @@ public void testGetSCMAddresses() {
       assertTrue(e instanceof IllegalArgumentException);
     }
   }
+
+  @Test
+  public void testGetKSMAddress() {
+    final Configuration conf = new OzoneConfiguration();
+
+    // First try a client address with just a host name. Verify it falls
+    // back to the default port.
+    conf.set(KSMConfigKeys.OZONE_KSM_ADDRESS_KEY, "1.2.3.4");
+    InetSocketAddress addr = OzoneClientUtils.getKsmAddress(conf);
+    assertThat(addr.getHostString(), is("1.2.3.4"));
+    assertThat(addr.getPort(), is(KSMConfigKeys.OZONE_KSM_PORT_DEFAULT));
+
+    // Next try a client address with just a host name and port. Verify the port
+    // is ignored and the default KSM port is used.
+    conf.set(KSMConfigKeys.OZONE_KSM_ADDRESS_KEY, "1.2.3.4:100");
+    addr = OzoneClientUtils.getKsmAddress(conf);
+    assertThat(addr.getHostString(), is("1.2.3.4"));
+    assertThat(addr.getPort(), is(100));
+
+    // Assert the we are able to use default configs if no value is specified.
+    conf.set(KSMConfigKeys.OZONE_KSM_ADDRESS_KEY, "");
+    addr = OzoneClientUtils.getKsmAddress(conf);
+    assertThat(addr.getHostString(), is("0.0.0.0"));
+    assertThat(addr.getPort(), is(KSMConfigKeys.OZONE_KSM_PORT_DEFAULT));
+  }
 }
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/ContainerTestHelper.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/ContainerTestHelper.java
index 89b358aa4f..89ad9501f3 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/ContainerTestHelper.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/ozone/container/ContainerTestHelper.java
@@ -27,6 +27,7 @@
     .ContainerCommandRequestProto;
 import org.apache.hadoop.hdfs.ozone.protocol.proto.ContainerProtos
     .ContainerCommandResponseProto;
+import org.apache.hadoop.ozone.protocol.proto.OzoneProtos;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
 import org.apache.hadoop.ozone.OzoneConfigKeys;
 import org.apache.hadoop.ozone.OzoneConsts;
@@ -361,8 +362,8 @@ public static ContainerCommandRequestProto getUpdateContainerRequest(
     containerData.setName(containerName);
     String[] keys = metaData.keySet().toArray(new String[]{});
     for(int i=0; i<keys.length; i++) {
-      ContainerProtos.KeyValue.Builder kvBuilder =
-          ContainerProtos.KeyValue.newBuilder();
+      OzoneProtos.KeyValue.Builder kvBuilder =
+          OzoneProtos.KeyValue.newBuilder();
       kvBuilder.setKey(keys[i]);
       kvBuilder.setValue(metaData.get(keys[i]));
       containerData.addMetadata(i, kvBuilder.build());