A new protocol similar to FD_PING which detects entire host failures and suspects all members on the failed host.
Features are:

• Contrary to FD_PING which uses a ring structure, FD_HOST will have everyone ping everybody else (similar to FD_ALL)
  • A structure keeps track of hosts (IP addresses) and members on those hosts
    • Example

      192.168.1.2	192.168.1.3	192.168.1.5
      A,B,C	D,E,F	X,Y,Z

• We sort the members lexically and the first member runs a ping against each other IP address, e.g. A pings 192.168.1.3 and 192.168.1.5, D pings 192.168.1.2 and 192.168.1.5 etc
• The ping command itself is pluggable and can be a Java class (e.g. using InetAddress.isReachable(), a script or a command (e.g. /sbin/ping).
• When an entire host is suspected, we suspect all cluster members on it
  • Example: if B suspects 192.168.1.5, members X, Y and Z are suspected and removed from the view