/*
* There is high probability that the rack id generated here will
* not conflict with those of other data node cluster.
* Not perfect but mostly unique rack ids are good enough
*/
private static string GetUniqueRackPrefix()
{
string ip = "unknownIP";
try
{
ip = DNS.GetDefaultIP("default");
}
catch (UnknownHostException)
{
System.Console.Out.WriteLine("Could not find ip address of \"default\" inteface."
);
}
int rand = DFSUtil.GetSecureRandom().Next(int.MaxValue);
return("/Rack-" + rand + "-" + ip + "-" + Time.Now());
}
