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HDFS-3000. Add a public API for setting quotas. Contributed by Aaron T. Myers. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1309490 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Aaron Myers 2012-04-04 16:47:46 +00:00
parent ed22c28058
commit 4f720e23ca
3 changed files with 205 additions and 0 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -73,6 +73,8 @@ Release 2.0.0 - UNRELEASED
HDFS-3148. The client should be able to use multiple local interfaces
for data transfer. (eli)
HDFS-3000. Add a public API for setting quotas. (atm)
IMPROVEMENTS
HDFS-2018. Move all journal stream management code into one place.

108
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsAdmin.java Normal file
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@ -0,0 +1,108 @@
/**
* 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.client;
import java.io.IOException;
import java.net.URI;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.tools.DFSAdmin;
/**
* The public API for performing administrative functions on HDFS. Those writing
* applications against HDFS should prefer this interface to directly accessing
* functionality in DistributedFileSystem or DFSClient.
*
* Note that this is distinct from the similarly-named {@link DFSAdmin}, which
* is a class that provides the functionality for the CLI `hdfs dfsadmin ...'
* commands.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class HdfsAdmin {
private DistributedFileSystem dfs;
/**
* Create a new HdfsAdmin client.
*
* @param uri the unique URI of the HDFS file system to administer
* @param conf configuration
* @throws IOException in the event the file system could not be created
*/
public HdfsAdmin(URI uri, Configuration conf) throws IOException {
FileSystem fs = FileSystem.get(uri, conf);
if (!(fs instanceof DistributedFileSystem)) {
throw new IllegalArgumentException("'" + uri + "' is not an HDFS URI.");
} else {
dfs = (DistributedFileSystem)fs;
}
}
/**
* Set the namespace quota (count of files, directories, and sym links) for a
* directory.
*
* @param src the path to set the quota for
* @param quota the value to set for the quota
* @throws IOException in the event of error
*/
public void setQuota(Path src, long quota) throws IOException {
dfs.setQuota(src, quota, HdfsConstants.QUOTA_DONT_SET);
}
/**
* Clear the namespace quota (count of files, directories and sym links) for a
* directory.
*
* @param src the path to clear the quota of
* @throws IOException in the event of error
*/
public void clearQuota(Path src) throws IOException {
dfs.setQuota(src, HdfsConstants.QUOTA_RESET, HdfsConstants.QUOTA_DONT_SET);
}
/**
* Set the disk space quota (size of files) for a directory. Note that
* directories and sym links do not occupy disk space.
*
* @param src the path to set the space quota of
* @param spaceQuota the value to set for the space quota
* @throws IOException in the event of error
*/
public void setSpaceQuota(Path src, long spaceQuota) throws IOException {
dfs.setQuota(src, HdfsConstants.QUOTA_DONT_SET, spaceQuota);
}
/**
* Clear the disk space quota (size of files) for a directory. Note that
* directories and sym links do not occupy disk space.
*
* @param src the path to clear the space quota of
* @throws IOException in the event of error
*/
public void clearSpaceQuota(Path src) throws IOException {
dfs.setQuota(src, HdfsConstants.QUOTA_DONT_SET, HdfsConstants.QUOTA_RESET);
}
}

95
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestHdfsAdmin.java Normal file
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@ -0,0 +1,95 @@
/**
* 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;
import static org.junit.Assert.*;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.client.HdfsAdmin;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class TestHdfsAdmin {
private static final Path TEST_PATH = new Path("/test");
private Configuration conf = new Configuration();
private MiniDFSCluster cluster;
@Before
public void setUpCluster() throws IOException {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
}
@After
public void shutDownCluster() {
if (cluster != null) {
cluster.shutdown();
}
}
/**
* Test that we can set and clear quotas via {@link HdfsAdmin}.
*/
@Test
public void testHdfsAdminSetQuota() throws Exception {
HdfsAdmin dfsAdmin = new HdfsAdmin(
FileSystem.getDefaultUri(conf), conf);
FileSystem fs = null;
try {
fs = FileSystem.get(conf);
assertTrue(fs.mkdirs(TEST_PATH));
assertEquals(-1, fs.getContentSummary(TEST_PATH).getQuota());
assertEquals(-1, fs.getContentSummary(TEST_PATH).getSpaceQuota());
dfsAdmin.setSpaceQuota(TEST_PATH, 10);
assertEquals(-1, fs.getContentSummary(TEST_PATH).getQuota());
assertEquals(10, fs.getContentSummary(TEST_PATH).getSpaceQuota());
dfsAdmin.setQuota(TEST_PATH, 10);
assertEquals(10, fs.getContentSummary(TEST_PATH).getQuota());
assertEquals(10, fs.getContentSummary(TEST_PATH).getSpaceQuota());
dfsAdmin.clearSpaceQuota(TEST_PATH);
assertEquals(10, fs.getContentSummary(TEST_PATH).getQuota());
assertEquals(-1, fs.getContentSummary(TEST_PATH).getSpaceQuota());
dfsAdmin.clearQuota(TEST_PATH);
assertEquals(-1, fs.getContentSummary(TEST_PATH).getQuota());
assertEquals(-1, fs.getContentSummary(TEST_PATH).getSpaceQuota());
} finally {
if (fs != null) {
fs.close();
}
}
}
/**
* Make sure that a non-HDFS URI throws a helpful error.
*/
@Test(expected = IllegalArgumentException.class)
public void testHdfsAdminWithBadUri() throws IOException, URISyntaxException {
new HdfsAdmin(new URI("file:///bad-scheme"), conf);
}
}