Adding file missed in the revision 1455805

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1455807 13f79535-47bb-0310-9956-ffa450edef68
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Suresh Srinivas 2013-03-13 06:06:21 +00:00
parent 719c313be1
commit b8f3133e04
1 changed files with 174 additions and 0 deletions

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/**
* 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.namenode.snapshot;
import static org.apache.hadoop.test.MetricsAsserts.assertCounter;
import static org.apache.hadoop.test.MetricsAsserts.assertGauge;
import static org.apache.hadoop.test.MetricsAsserts.getMetrics;
import static org.junit.Assert.assertEquals;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
* Test the snapshot-related metrics
*/
public class TestSnapshotMetrics {
private static final long seed = 0;
private static final short REPLICATION = 3;
private static final String NN_METRICS = "NameNodeActivity";
private static final String NS_METRICS = "FSNamesystem";
private final Path dir = new Path("/TestSnapshot");
private final Path sub1 = new Path(dir, "sub1");
private final Path file1 = new Path(sub1, "file1");
private final Path file2 = new Path(sub1, "file2");
private Configuration conf;
private MiniDFSCluster cluster;
private DistributedFileSystem hdfs;
@Before
public void setUp() throws Exception {
conf = new Configuration();
cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(REPLICATION)
.build();
cluster.waitActive();
hdfs = cluster.getFileSystem();
DFSTestUtil.createFile(hdfs, file1, 1024, REPLICATION, seed);
DFSTestUtil.createFile(hdfs, file2, 1024, REPLICATION, seed);
}
@After
public void tearDown() throws Exception {
if (cluster != null) {
cluster.shutdown();
}
}
/**
* Test the metric SnapshottableDirectories, AllowSnapshotOps,
* DisallowSnapshotOps, and listSnapshottableDirOps
*/
@Test
public void testSnapshottableDirs() throws Exception {
assertGauge("SnapshottableDirectories", 0L, getMetrics(NS_METRICS));
assertCounter("AllowSnapshotOps", 0L, getMetrics(NN_METRICS));
assertCounter("DisallowSnapshotOps", 0L, getMetrics(NN_METRICS));
// Allow snapshots for directories, and check the metrics
hdfs.allowSnapshot(sub1.toString());
assertGauge("SnapshottableDirectories", 1L, getMetrics(NS_METRICS));
assertCounter("AllowSnapshotOps", 1L, getMetrics(NN_METRICS));
Path sub2 = new Path(dir, "sub2");
Path file = new Path(sub2, "file");
DFSTestUtil.createFile(hdfs, file, 1024, REPLICATION, seed);
hdfs.allowSnapshot(sub2.toString());
assertGauge("SnapshottableDirectories", 2L, getMetrics(NS_METRICS));
assertCounter("AllowSnapshotOps", 2L, getMetrics(NN_METRICS));
Path subsub1 = new Path(sub1, "sub1sub1");
Path subfile = new Path(subsub1, "file");
DFSTestUtil.createFile(hdfs, subfile, 1024, REPLICATION, seed);
hdfs.allowSnapshot(subsub1.toString());
assertGauge("SnapshottableDirectories", 3L, getMetrics(NS_METRICS));
assertCounter("AllowSnapshotOps", 3L, getMetrics(NN_METRICS));
// Set an already snapshottable directory to snapshottable, should not
// change the metrics
hdfs.allowSnapshot(sub1.toString());
assertGauge("SnapshottableDirectories", 3L, getMetrics(NS_METRICS));
// But the number of allowSnapshot operations still increases
assertCounter("AllowSnapshotOps", 4L, getMetrics(NN_METRICS));
// Disallow the snapshot for snapshottable directories, then check the
// metrics again
hdfs.disallowSnapshot(sub1.toString());
assertGauge("SnapshottableDirectories", 2L, getMetrics(NS_METRICS));
assertCounter("DisallowSnapshotOps", 1L, getMetrics(NN_METRICS));
// delete subsub1, snapshottable directories should be 1
hdfs.delete(subsub1, true);
assertGauge("SnapshottableDirectories", 1L, getMetrics(NS_METRICS));
// list all the snapshottable directories
SnapshottableDirectoryStatus[] status = hdfs.getSnapshottableDirListing();
assertEquals(1, status.length);
assertCounter("ListSnapshottableDirOps", 1L, getMetrics(NN_METRICS));
}
/**
* Test the metrics Snapshots, CreateSnapshotOps, DeleteSnapshotOps,
* RenameSnapshotOps
*/
@Test
public void testSnapshots() throws Exception {
assertGauge("Snapshots", 0L, getMetrics(NS_METRICS));
assertCounter("CreateSnapshotOps", 0L, getMetrics(NN_METRICS));
// Create a snapshot for a non-snapshottable directory, thus should not
// change the metrics
try {
hdfs.createSnapshot(sub1, "s1");
} catch (Exception e) {}
assertGauge("Snapshots", 0L, getMetrics(NS_METRICS));
assertCounter("CreateSnapshotOps", 1L, getMetrics(NN_METRICS));
// Create snapshot for sub1
hdfs.allowSnapshot(sub1.toString());
hdfs.createSnapshot(sub1, "s1");
assertGauge("Snapshots", 1L, getMetrics(NS_METRICS));
assertCounter("CreateSnapshotOps", 2L, getMetrics(NN_METRICS));
hdfs.createSnapshot(sub1, "s2");
assertGauge("Snapshots", 2L, getMetrics(NS_METRICS));
assertCounter("CreateSnapshotOps", 3L, getMetrics(NN_METRICS));
hdfs.getSnapshotDiffReport(sub1, "s1", "s2");
assertCounter("SnapshotDiffReportOps", 1L, getMetrics(NN_METRICS));
// Create snapshot for a directory under sub1
Path subsub1 = new Path(sub1, "sub1sub1");
Path subfile = new Path(subsub1, "file");
DFSTestUtil.createFile(hdfs, subfile, 1024, REPLICATION, seed);
hdfs.allowSnapshot(subsub1.toString());
hdfs.createSnapshot(subsub1, "s11");
assertGauge("Snapshots", 3L, getMetrics(NS_METRICS));
assertCounter("CreateSnapshotOps", 4L, getMetrics(NN_METRICS));
// delete snapshot
hdfs.deleteSnapshot(sub1, "s2");
assertGauge("Snapshots", 2L, getMetrics(NS_METRICS));
assertCounter("DeleteSnapshotOps", 1L, getMetrics(NN_METRICS));
// rename snapshot
hdfs.renameSnapshot(sub1, "s1", "NewS1");
assertGauge("Snapshots", 2L, getMetrics(NS_METRICS));
assertCounter("RenameSnapshotOps", 1L, getMetrics(NN_METRICS));
}
}