/*
* Calculate the available space of the filesystem, excluding space reserved
* for non-HDFS and space reserved for RBW
*
* @return the available number of bytes left in this filesystem. May be zero.
*/
/// <exception cref="System.IO.IOException"/>
public override long GetAvailable()
{
long remaining = GetCapacity() - GetDfsUsed() - reservedForRbw.Get();
long available = usage.GetAvailable() - reserved - reservedForRbw.Get();
if (remaining > available)
{
remaining = available;
}
return((remaining > 0) ? remaining : 0);
}