README.replicated-server

Supported forms for mount paths are:

Normal single-host (these are unchanged)
<path> host:/path/path

Single host entries are not probed for a server response.

Multiple replicated hosts, same path:
<path> host1,host2,hostn:/path/path

Multiple hosts, some with same path, some with another
<path> host1,host2:/blah host3:/some/other/path

Multiple replicated hosts, different (potentially) paths:
<path> host1:/path/pathA host2:/path/pathB

Mutliple weighted, replicated hosts same path:
<path> host1(5),host2(6),host3(1):/path/path

Multiple weighted, replicated hosts different (potentially) 
paths:
<path> host1(3):/path/pathA host2(5):/path/pathB

For these formats a priority ordered list of hosts is created by using
the following selection rules.

1) Highest priority in selection is proximity.
   Proximity, in order of precedence is:
     - PROXIMITY_LOCAL, host corresponds to a local interface.
     - PROXIMITY_SUBNET, host is located in a subnet reachable
       through a local interface.
     - PROXIMITY_NETWORK, host is located in a network reachable
       through a local interface.
     - PROXIMITY_OTHER, host is on a network not directlty
       reachable through a local interface.
  
2) NFS version and protocol is selected by caclculating the largest
   number of hosts supporting an NFS version and protocol that
   have the closest proximity. These hosts are added to the list
   in response time order. Hosts may have a corresponding weight
   which essentially increases response time and so influences the
   host order.
  
3) Hosts at further proximity that support the selected NFS version
   and protocol are also added to the list in response time order as
   in 2 above.