// Tests that files are evicted when there is not enough space in the worker.
@Test
public void evictionTest() throws Exception {
final int blockSize = (int) WORKER_CAPACITY_BYTES / 2;
AlluxioURI file1 = new AlluxioURI("/file1");
FileSystemTestUtils.createByteFile(mFileSystem, file1, WriteType.MUST_CACHE, blockSize);
// File should be in memory after it is written with MUST_CACHE
URIStatus fileInfo1 = mFileSystem.getStatus(file1);
Assert.assertEquals(100, fileInfo1.getInMemoryPercentage());
AlluxioURI file2 = new AlluxioURI("/file2");
FileSystemTestUtils.createByteFile(mFileSystem, file2, WriteType.MUST_CACHE, blockSize);
// Both file 1 and 2 should be in memory since the combined size is not larger than worker space
fileInfo1 = mFileSystem.getStatus(file1);
URIStatus fileInfo2 = mFileSystem.getStatus(file2);
Assert.assertEquals(100, fileInfo1.getInMemoryPercentage());
Assert.assertEquals(100, fileInfo2.getInMemoryPercentage());
AlluxioURI file3 = new AlluxioURI("/file3");
FileSystemTestUtils.createByteFile(mFileSystem, file3, WriteType.MUST_CACHE, blockSize);
waitForHeartbeat();
fileInfo1 = mFileSystem.getStatus(file1);
fileInfo2 = mFileSystem.getStatus(file2);
URIStatus fileInfo3 = mFileSystem.getStatus(file3);
// File 3 should be in memory and one of file 1 or 2 should be in memory
Assert.assertEquals(100, fileInfo3.getInMemoryPercentage());
Assert.assertTrue(
"Exactly one of file1 and file2 should be 100% in memory",
fileInfo1.getInMemoryPercentage() == 100 ^ fileInfo2.getInMemoryPercentage() == 100);
}
@Test
public void catTest() throws IOException {
FileSystemTestUtils.createByteFile(mFileSystem, "/testFile", WriteType.MUST_CACHE, 10);
mFsShell.run("cat", "/testFile");
byte[] expect = BufferUtils.getIncreasingByteArray(10);
Assert.assertArrayEquals(expect, mOutput.toByteArray());
}
@BeforeClass
public static void beforeClass() throws Exception {
Configuration conf = new Configuration();
conf.set("fs.alluxio.impl", FileSystem.class.getName());
alluxio.client.file.FileSystem alluxioFS = sLocalAlluxioClusterResource.get().getClient();
FileSystemTestUtils.createByteFile(alluxioFS, "/testFile1", WriteType.CACHE_THROUGH, FILE_LEN);
URI uri = URI.create(sLocalAlluxioClusterResource.get().getMasterURI());
sTFS = org.apache.hadoop.fs.FileSystem.get(uri, conf);
}