/// <summary>Test deleting a file with snapshots.</summary>
/// <remarks>
/// Test deleting a file with snapshots. Need to check the blocksMap to make
/// sure the corresponding record is updated correctly.
/// </remarks>
/// <exception cref="System.Exception"/>
public virtual void TestDeletionWithSnapshots()
{
Path file0 = new Path(sub1, "file0");
Path file1 = new Path(sub1, "file1");
Path sub2 = new Path(sub1, "sub2");
Path file2 = new Path(sub2, "file2");
Path file3 = new Path(sub1, "file3");
Path file4 = new Path(sub1, "file4");
Path file5 = new Path(sub1, "file5");
// Create file under sub1
DFSTestUtil.CreateFile(hdfs, file0, 4 * Blocksize, Replication, seed);
DFSTestUtil.CreateFile(hdfs, file1, 2 * Blocksize, Replication, seed);
DFSTestUtil.CreateFile(hdfs, file2, 3 * Blocksize, Replication, seed);
{
// Normal deletion
INodeFile f2 = AssertBlockCollection(file2.ToString(), 3, fsdir, blockmanager);
BlockInfoContiguous[] blocks = f2.GetBlocks();
hdfs.Delete(sub2, true);
// The INode should have been removed from the blocksMap
foreach (BlockInfoContiguous b in blocks)
{
NUnit.Framework.Assert.IsNull(blockmanager.GetBlockCollection(b));
}
}
// Create snapshots for sub1
string[] snapshots = new string[] { "s0", "s1", "s2" };
DFSTestUtil.CreateFile(hdfs, file3, 5 * Blocksize, Replication, seed);
SnapshotTestHelper.CreateSnapshot(hdfs, sub1, snapshots[0]);
DFSTestUtil.CreateFile(hdfs, file4, 1 * Blocksize, Replication, seed);
SnapshotTestHelper.CreateSnapshot(hdfs, sub1, snapshots[1]);
DFSTestUtil.CreateFile(hdfs, file5, 7 * Blocksize, Replication, seed);
SnapshotTestHelper.CreateSnapshot(hdfs, sub1, snapshots[2]);
{
// set replication so that the inode should be replaced for snapshots
INodeFile f1 = AssertBlockCollection(file1.ToString(), 2, fsdir, blockmanager);
NUnit.Framework.Assert.AreSame(typeof(INodeFile), f1.GetType());
hdfs.SetReplication(file1, (short)2);
f1 = AssertBlockCollection(file1.ToString(), 2, fsdir, blockmanager);
NUnit.Framework.Assert.IsTrue(f1.IsWithSnapshot());
NUnit.Framework.Assert.IsFalse(f1.IsUnderConstruction());
}
// Check the block information for file0
INodeFile f0 = AssertBlockCollection(file0.ToString(), 4, fsdir, blockmanager);
BlockInfoContiguous[] blocks0 = f0.GetBlocks();
// Also check the block information for snapshot of file0
Path snapshotFile0 = SnapshotTestHelper.GetSnapshotPath(sub1, "s0", file0.GetName
());
AssertBlockCollection(snapshotFile0.ToString(), 4, fsdir, blockmanager);
// Delete file0
hdfs.Delete(file0, true);
// Make sure the blocks of file0 is still in blocksMap
foreach (BlockInfoContiguous b_1 in blocks0)
{
NUnit.Framework.Assert.IsNotNull(blockmanager.GetBlockCollection(b_1));
}
AssertBlockCollection(snapshotFile0.ToString(), 4, fsdir, blockmanager);
// Compare the INode in the blocksMap with INodes for snapshots
string s1f0 = SnapshotTestHelper.GetSnapshotPath(sub1, "s1", file0.GetName()).ToString
();
AssertBlockCollection(s1f0, 4, fsdir, blockmanager);
// Delete snapshot s1
hdfs.DeleteSnapshot(sub1, "s1");
// Make sure the first block of file0 is still in blocksMap
foreach (BlockInfoContiguous b_2 in blocks0)
{
NUnit.Framework.Assert.IsNotNull(blockmanager.GetBlockCollection(b_2));
}
AssertBlockCollection(snapshotFile0.ToString(), 4, fsdir, blockmanager);
try
{
INodeFile.ValueOf(fsdir.GetINode(s1f0), s1f0);
NUnit.Framework.Assert.Fail("Expect FileNotFoundException when identifying the INode in a deleted Snapshot"
);
}
catch (IOException e)
{
GenericTestUtils.AssertExceptionContains("File does not exist: " + s1f0, e);
}
}
