@BeforeClass
public static void setUpBeforeClass() throws Exception {
File minidfsDir = new File("target/minidfs-" + UUID.randomUUID()).getAbsoluteFile();
minidfsDir.mkdirs();
Assert.assertTrue(minidfsDir.exists());
System.setProperty(MiniDFSCluster.PROP_TEST_BUILD_DATA, minidfsDir.getPath());
Configuration conf = new HdfsConfiguration();
conf.set("dfs.namenode.fs-limits.min-block-size", String.valueOf(32));
EditLogFileOutputStream.setShouldSkipFsyncForTesting(true);
miniDFS = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
dir = new Path(miniDFS.getURI() + "/dir");
FileSystem fs = miniDFS.getFileSystem();
fs.mkdirs(dir);
writeFile(fs, new Path(dir + "/forAllTests/" + "path"), 1000);
dummyEtc = new File(minidfsDir, "dummy-etc");
dummyEtc.mkdirs();
Assert.assertTrue(dummyEtc.exists());
Configuration dummyConf = new Configuration(false);
for (String file : new String[] {"core", "hdfs", "mapred", "yarn"}) {
File siteXml = new File(dummyEtc, file + "-site.xml");
FileOutputStream out = new FileOutputStream(siteXml);
dummyConf.writeXml(out);
out.close();
}
resourcesDir = minidfsDir.getAbsolutePath();
hadoopConfDir = dummyEtc.getName();
System.setProperty("sdc.resources.dir", resourcesDir);
;
}
@BeforeClass
public static void setupTest() {
EditLogFileOutputStream.setShouldSkipFsyncForTesting(true);
// Track calls to posix_fadvise.
NativeIO.POSIX.setCacheManipulator(tracker);
// Normally, we wait for a few megabytes of data to be read or written
// before dropping the cache. This is to avoid an excessive number of
// JNI calls to the posix_fadvise function. However, for the purpose
// of this test, we want to use small files and see all fadvise calls
// happen.
BlockSender.CACHE_DROP_INTERVAL_BYTES = 4096;
BlockReceiver.CACHE_DROP_LAG_BYTES = 4096;
}