[jboss-user] [JBossCache] - JbossCache replication and ip multicast

[mckeno]

Hi all,

As I understand, JbossCache accomplished the clustering and replication by using JGroups. JGroups in the other hand uses ip multicasting to multicast a message to all the nodes that register to a multicast address.
The default configure for ClusterConfig uses UDP, in the JGroups documentation it says:
anonymous wrote : TCP is a replacement of UDP as bottom layer in cases where IP Multicast based on UDP is not desired. This may
  | be the case when operating over a WAN, where routers will discard IP MCAST. As a rule of thumb UDP is used as
  | transport for LANs, whereas TCP is used for WANs.
So if I want to have my cache replicated over different server via internet (not just in LAN) I would have configure the JbossCache to use TCP protocol right? I tried to do that, but it doesn't seem to work.... could anybody help?

Before:
 
  | <attribute name="ClusterConfig">
  | <config>
  | <UDP mcast_addr="228.1.2.5" mcast_port="45577"
  |                  ip_ttl="64" ip_mcast="true"
  |                  mcast_send_buf_size="150000" mcast_recv_buf_size="80000"
  |                  ucast_send_buf_size="150000" ucast_recv_buf_size="80000"
  |                  loopback="false"/>-->
  | <PING timeout="2000" num_initial_members="3"
  |                  up_thread="false" down_thread="false"/>-->
  | ...
  | ...
  | 
Now:

  | change to 
  | 
  | <attribute name="ClusterConfig">
  | <config>
  | <TCP start_port="7800"/>
  | <PING timeout="3000" num_initial_members="3" />
  | ...
  | ...
  | or
  | 
  | <attribute name="ClusterConfig">
  | <config>
  | <TCP start_port="7800"/>
  | <TCPPING initial_hosts="localhost[7800]"
  | 	port_range="5" timeout="3000" num_initial_members="3"
  | 	up_thread="true" down_thread="true"/>
  | ...
  | ...
  | 
  | but does not work ...
  | 

BTW, how does this multicast works, do I need a host or server to bind to or something?

Thanks in advance


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