/// <summary>Delete a snapshot for a snapshottable directory</summary>
/// <param name="snapshotName">Name of the snapshot to be deleted</param>
/// <param name="collectedBlocks">Used to collect information to update blocksMap</param>
/// <exception cref="System.IO.IOException"/>
public virtual void DeleteSnapshot(INodesInPath iip, string snapshotName, INode.BlocksMapUpdateInfo
collectedBlocks, IList <INode> removedINodes)
{
INodeDirectory srcRoot = GetSnapshottableRoot(iip);
srcRoot.RemoveSnapshot(fsdir.GetBlockStoragePolicySuite(), snapshotName, collectedBlocks
, removedINodes);
numSnapshots.GetAndDecrement();
}
