TestDataDirs.java
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* to you under the Apache License, Version 2.0 (the
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package org.apache.hadoop.hdfs.server.datanode;
import java.io.*;
import java.net.URI;
import java.util.*;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.DF;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.StorageType;
import org.apache.hadoop.util.Shell;
import org.opentest4j.TestAbortedException;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.Timeout;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY;
import static org.junit.jupiter.api.Assertions.*;
import static org.assertj.core.api.Assertions.assertThat;
public class TestDataDirs {
@Test
@Timeout(value = 30)
public void testDataDirParsing() throws Throwable {
Configuration conf = new Configuration();
List<StorageLocation> locations;
File dir0 = new File("/dir0");
File dir1 = new File("/dir1");
File dir2 = new File("/dir2");
File dir3 = new File("/dir3");
File dir4 = new File("/dir4");
File dir5 = new File("/dir5");
File dir6 = new File("/dir6");
File dir7 = new File("/dir7");
// Verify that a valid string is correctly parsed, and that storage
// type is not case-sensitive and we are able to handle white-space between
// storage type and URI.
String locations1 = "[disk]/dir0,[DISK]/dir1,[sSd]/dir2,[disK]/dir3," +
"[ram_disk]/dir4,[disk]/dir5, [disk] /dir6, [disk] , [nvdimm]/dir7";
conf.set(DFS_DATANODE_DATA_DIR_KEY, locations1);
locations = DataNode.getStorageLocations(conf);
assertThat(locations.size()).isEqualTo(9);
assertThat(locations.get(0).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(0).getUri()).isEqualTo(dir0.toURI());
assertThat(locations.get(1).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(1).getUri()).isEqualTo(dir1.toURI());
assertThat(locations.get(2).getStorageType()).isEqualTo(StorageType.SSD);
assertThat(locations.get(2).getUri()).isEqualTo(dir2.toURI());
assertThat(locations.get(3).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(3).getUri()).isEqualTo(dir3.toURI());
assertThat(locations.get(4).getStorageType()).isEqualTo(StorageType.RAM_DISK);
assertThat(locations.get(4).getUri()).isEqualTo(dir4.toURI());
assertThat(locations.get(5).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(5).getUri()).isEqualTo(dir5.toURI());
assertThat(locations.get(6).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(6).getUri()).isEqualTo(dir6.toURI());
// not asserting the 8th URI since it is incomplete and it in the
// test set to make sure that we don't fail if we get URIs like that.
assertThat(locations.get(7).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(8).getStorageType()).isEqualTo(StorageType.NVDIMM);
assertThat(locations.get(8).getUri()).isEqualTo(dir7.toURI());
// Verify that an unrecognized storage type result in an exception.
String locations2 = "[BadMediaType]/dir0,[ssd]/dir1,[disk]/dir2";
conf.set(DFS_DATANODE_DATA_DIR_KEY, locations2);
try {
locations = DataNode.getStorageLocations(conf);
fail();
} catch (IllegalArgumentException iae) {
DataNode.LOG.info("The exception is expected.", iae);
}
// Assert that a string with no storage type specified is
// correctly parsed and the default storage type is picked up.
String locations3 = "/dir0,/dir1";
conf.set(DFS_DATANODE_DATA_DIR_KEY, locations3);
locations = DataNode.getStorageLocations(conf);
assertThat(locations.size()).isEqualTo(2);
assertThat(locations.get(0).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(0).getUri()).isEqualTo(dir0.toURI());
assertThat(locations.get(1).getStorageType()).isEqualTo(StorageType.DISK);
assertThat(locations.get(1).getUri()).isEqualTo(dir1.toURI());
}
@Test
public void testDataDirFileSystem() throws Exception {
if (Shell.MAC) {
throw new TestAbortedException("Not supported on MAC OS");
}
Configuration conf = new Configuration();
String archiveDir = "/home";
String location = "[DISK]/dir1,[ARCHIVE]" + archiveDir;
conf.set(DFS_DATANODE_DATA_DIR_KEY, location);
// NO any filesystem is set, should do as before
List<StorageLocation> locations = DataNode.getStorageLocations(conf);
assertEquals(2, locations.size());
// Set the filesystem of archive as NOT existing filesystem
// the archive directory should not be added.
conf.set("dfs.datanode.storagetype.ARCHIVE.filesystem",
"nothis_filesystem");
locations = DataNode.getStorageLocations(conf);
assertEquals(1, locations.size());
// Set the filesystem of archive as right filesystem
// the archive directory should be added.
DF df = new DF(new File(archiveDir), conf);
String fsInfo = df.getFilesystem();
conf.set("dfs.datanode.storagetype.ARCHIVE.filesystem", fsInfo);
locations = DataNode.getStorageLocations(conf);
assertEquals(2, locations.size());
}
@Test
public void testCapacityRatioForDataDir() {
// Good case
String config = "[0.9 ]/disk /2, [0.1]/disk2/1";
Map<URI, Double> map = StorageLocation.parseCapacityRatio(config);
assertEquals(0.9, map.get(new Path("/disk/2").toUri()), 0);
assertEquals(0.1, map.get(new Path("/disk2/1").toUri()), 0);
// config without capacity ratio
config = "[0.9 ]/disk /2, /disk2/1";
try {
StorageLocation.parseCapacityRatio(config);
fail("Should fail parsing");
} catch (IllegalArgumentException e) {
assertTrue(e.getMessage().contains(
"Capacity ratio config is not with correct form"));
}
// config with bad capacity ratio
config = "[11.1]/disk /2";
try {
StorageLocation.parseCapacityRatio(config);
fail("Should fail parsing");
} catch (IllegalArgumentException e) {
assertTrue(e.getMessage().contains("is not between 0 to 1"));
}
}
}