/// <summary>Create empty block pool directories</summary>
/// <returns>array of block pool directories</returns>
/// <exception cref="System.IO.IOException"/>
public static string[] CreateEmptyBPDirs(string[] baseDirs, string bpid)
{
string[] bpDirs = new string[baseDirs.Length];
for (int i = 0; i < baseDirs.Length; i++)
{
bpDirs[i] = MiniDFSCluster.GetBPDir(new FilePath(baseDirs[i]), bpid);
}
CreateEmptyDirs(bpDirs);
return(bpDirs);
}
/// <summary>
/// Simulate the
/// <see cref="DFSConfigKeys.DfsDatanodeDataDirKey"/>
/// of a
/// populated DFS filesystem.
/// This method populates for each parent directory, <code>parent/dirName</code>
/// with the content of block pool storage directory that comes from a singleton
/// datanode master (that contains version and block files). If the destination
/// directory does not exist, it will be created. If the directory already
/// exists, it will first be deleted.
/// </summary>
/// <param name="parents">
/// parent directory where
/// <paramref name="dirName"/>
/// is created
/// </param>
/// <param name="dirName">directory under which storage directory is created</param>
/// <param name="bpid">block pool id for which the storage directory is created.</param>
/// <returns>the array of created directories</returns>
/// <exception cref="System.Exception"/>
public static FilePath[] CreateBlockPoolStorageDirs(string[] parents, string dirName
, string bpid)
{
FilePath[] retVal = new FilePath[parents.Length];
Path bpCurDir = new Path(MiniDFSCluster.GetBPDir(datanodeStorage, bpid, Storage.StorageDirCurrent
));
for (int i = 0; i < parents.Length; i++)
{
FilePath newDir = new FilePath(parents[i] + "/current/" + bpid, dirName);
CreateEmptyDirs(new string[] { newDir.ToString() });
LocalFileSystem localFS = FileSystem.GetLocal(new HdfsConfiguration());
localFS.CopyToLocalFile(bpCurDir, new Path(newDir.ToString()), false);
retVal[i] = newDir;
}
return(retVal);
}