/// <summary>Set the given snapshottable directory to non-snapshottable.</summary>
/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.SnapshotException">if there are snapshots in the directory.
/// </exception>
/// <exception cref="System.IO.IOException"/>
public virtual void ResetSnapshottable(string path)
{
INodesInPath iip = fsdir.GetINodesInPath4Write(path);
INodeDirectory d = INodeDirectory.ValueOf(iip.GetLastINode(), path);
DirectorySnapshottableFeature sf = d.GetDirectorySnapshottableFeature();
if (sf == null)
{
// the directory is already non-snapshottable
return;
}
if (sf.GetNumSnapshots() > 0)
{
throw new SnapshotException("The directory " + path + " has snapshot(s). " + "Please redo the operation after removing all the snapshots."
);
}
if (d == fsdir.GetRoot())
{
d.SetSnapshotQuota(0);
}
else
{
d.RemoveSnapshottableFeature();
}
RemoveSnapshottable(d);
}
/// <summary>
/// Find the source root directory where the snapshot will be taken
/// for a given path.
/// </summary>
/// <returns>Snapshottable directory.</returns>
/// <exception cref="System.IO.IOException">
/// Throw IOException when the given path does not lead to an
/// existing snapshottable directory.
/// </exception>
public virtual INodeDirectory GetSnapshottableRoot(INodesInPath iip)
{
string path = iip.GetPath();
INodeDirectory dir = INodeDirectory.ValueOf(iip.GetLastINode(), path);
if (!dir.IsSnapshottable())
{
throw new SnapshotException("Directory is not a snapshottable directory: " + path
);
}
return(dir);
}
/// <summary>Set the given directory as a snapshottable directory.</summary>
/// <remarks>
/// Set the given directory as a snapshottable directory.
/// If the path is already a snapshottable directory, update the quota.
/// </remarks>
/// <exception cref="System.IO.IOException"/>
public virtual void SetSnapshottable(string path, bool checkNestedSnapshottable)
{
INodesInPath iip = fsdir.GetINodesInPath4Write(path);
INodeDirectory d = INodeDirectory.ValueOf(iip.GetLastINode(), path);
if (checkNestedSnapshottable)
{
CheckNestedSnapshottable(d, path);
}
if (d.IsSnapshottable())
{
//The directory is already a snapshottable directory.
d.SetSnapshotQuota(DirectorySnapshottableFeature.SnapshotLimit);
}
else
{
d.AddSnapshottableFeature();
}
AddSnapshottable(d);
}
/// <exception cref="System.Exception"/>
public virtual void TestSetQuota()
{
Path dir = new Path("/TestSnapshot");
hdfs.Mkdirs(dir);
// allow snapshot on dir and create snapshot s1
SnapshotTestHelper.CreateSnapshot(hdfs, dir, "s1");
Path sub = new Path(dir, "sub");
hdfs.Mkdirs(sub);
Path fileInSub = new Path(sub, "file");
DFSTestUtil.CreateFile(hdfs, fileInSub, Blocksize, Replication, seed);
INodeDirectory subNode = INodeDirectory.ValueOf(fsdir.GetINode(sub.ToString()), sub
);
// subNode should be a INodeDirectory, but not an INodeDirectoryWithSnapshot
NUnit.Framework.Assert.IsFalse(subNode.IsWithSnapshot());
hdfs.SetQuota(sub, long.MaxValue - 1, long.MaxValue - 1);
subNode = INodeDirectory.ValueOf(fsdir.GetINode(sub.ToString()), sub);
NUnit.Framework.Assert.IsTrue(subNode.IsQuotaSet());
NUnit.Framework.Assert.IsFalse(subNode.IsWithSnapshot());
}
