/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.datanode.fsdataset;
import java.io.File;
import java.io.IOException;
/**
* This is an interface for the underlying volume.
*/
public interface FsVolumeSpi {
/** @return a list of block pools. */
public String[] getBlockPoolList();
/** @return the available storage space in bytes. */
public long getAvailable() throws IOException;
/** @return the base path to the volume */
public String getBasePath();
/** @return the path to the volume */
public String getPath(String bpid) throws IOException;
/** @return the directory for the finalized blocks in the block pool. */
public File getFinalizedDir(String bpid) throws IOException;
}