/// <exception cref="System.IO.IOException"/>
            public virtual int Run(Configuration conf, IList <string> args)
            {
                string path = StringUtils.PopOptionWithArgument("-path", args);

                if (path == null)
                {
                    System.Console.Error.WriteLine("Please specify the path with -path.\nUsage:" + GetLongUsage
                                                       ());
                    return(1);
                }
                DistributedFileSystem dfs = AdminHelper.GetDFS(conf);

                try
                {
                    HdfsFileStatus status = dfs.GetClient().GetFileInfo(path);
                    if (status == null)
                    {
                        System.Console.Error.WriteLine("File/Directory does not exist: " + path);
                        return(2);
                    }
                    byte storagePolicyId = status.GetStoragePolicy();
                    if (storagePolicyId == BlockStoragePolicySuite.IdUnspecified)
                    {
                        System.Console.Out.WriteLine("The storage policy of " + path + " is unspecified");
                        return(0);
                    }
                    BlockStoragePolicy[] policies = dfs.GetStoragePolicies();
                    foreach (BlockStoragePolicy p in policies)
                    {
                        if (p.GetId() == storagePolicyId)
                        {
                            System.Console.Out.WriteLine("The storage policy of " + path + ":\n" + p);
                            return(0);
                        }
                    }
                }
                catch (Exception e)
                {
                    System.Console.Error.WriteLine(AdminHelper.PrettifyException(e));
                    return(2);
                }
                System.Console.Error.WriteLine("Cannot identify the storage policy for " + path);
                return(2);
            }
            /// <exception cref="System.IO.IOException"/>
            public virtual int Run(Configuration conf, IList <string> args)
            {
                DistributedFileSystem dfs = AdminHelper.GetDFS(conf);

                try
                {
                    BlockStoragePolicy[] policies = dfs.GetStoragePolicies();
                    System.Console.Out.WriteLine("Block Storage Policies:");
                    foreach (BlockStoragePolicy policy in policies)
                    {
                        if (policy != null)
                        {
                            System.Console.Out.WriteLine("\t" + policy);
                        }
                    }
                }
                catch (IOException e)
                {
                    System.Console.Error.WriteLine(AdminHelper.PrettifyException(e));
                    return(2);
                }
                return(0);
            }