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h***:://admin.stary.ltd  

      Running on a Multi-Node clusting on KVM guest. By default KVM networking does not seem to allow guest to communicate over multicast. It also doesn't seem to work when bridging from a nic. From my reseach it looks like you have to setup a routed network from a KVM host and have all the guests on that shared network. In addition, you will want to enable multicast on the virtual nic that is shared by those guest. Here is is the udev code to make this happen. A reference to this issue is found here. # cat /etc/udevules.d/61-virbr-querier.rules ACTION=="add", SUBSYSTEM=="net", RUN+="/etc/sysconfig/network-scripts/vnet_querier_enable" # cat /etc/sysconfig/network-scripts/vnet_querier_enable #!/bin/sh if [[ $INTERFACE == virbr* ]]; then /bin/echo 1 > /sys/devices/virtual/net/$INTERFACE/bridge/multicast_querier fi Testing multicast support on nodes in the cluster The jgroups protocol includes a nice tool to verify multicast is working on all nodes. Its an echo tool and sends messages from a sender to a reciever On the receiver run java -cp /usr/share/sdfs/lib/jgroups-3.4.1.Final.jar org.jgroups.tests.McastReceiverTest -mcast_addr 231.12.21.132 -port 45566 On the sender run java -cp /usr/share/sdfs/lib/jgroups-3.4.1.Final.jar org.jgroups.tests.McastSenderTest -mcast_addr 231.12.21.132 -port 45566 Once you have both sides running type a message on the sender and you should see it on the receiver after you press enter. You may also want to switch rolls to make sure multicast works both directions. take a look at h***:://docs.jboss.org/jbossas/docs/Clustering_Guide/4/html/ch07s07s11.html for more detail. Further reading: Take a look at the administration guide for more detail. h***:://www.opendedup.org/sdfs-20-administration-guide Ask for Help If you still need help check out the message board here https://groups.google.com/forum/#!forum/dedupfilesystem-sdfs-user-discuss