Before installing Rhino, please configure the following network features.
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Cluster communications may be done over multicast or a unicast mesh protocol referred to as scattercast. One or other option must be selected at install time and should not be changed after installation. |
Feature | What to configure | ||
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IP address |
Make sure the system has an IP address and is visible on the network. |
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Host names |
Make sure that:
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Multicast addresses |
If the local system has a firewall installed, modify its rules to allow multicast UDP traffic:
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Scattercast addresses |
If the system has a firewall installed, modify its rules to allow unicast UDP traffic for all nodes.
Further details about Scattercast Management within Rhino. |
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Rhino cluster communication requires large UDP send and receive buffers. The operating system limits for socket transmit and receive buffers must be large enough to allow the buffer size to be set. Ensure that the kernel parameters To see the current values run: sysctl net.core.wmem_max net.core.rmem_max The values must be larger than the values set in To permanently set these kernel parameters, add or update the following lines in net.core.rmem_max = 262144 net.core.wmem_max = 262144 and reload the file with sudo sysctl -p |
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System clock |
As with most system services, it is not a good idea to make sudden changes to the system clock. The Rhino SLEE assumes that time will only ever go forwards, and that time increments are less than a few seconds.
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