This release features the following improvements: As of v15.0, Swarm Storage may be run without the use of multicast for inter-node communication. SCI 2.2 will default to not use multicast for both new installations and upgrades. This default is preferred for new installations. Any existing Swarm cluster installation would have has multicast enabled. Changing this setting between values requires a full (non-rolling) reboot of the entire cluster , which can be done at the same time as a during storage upgrade. If your an organization requires rolling reboots to avoid downtime, restore the legacy setting should be restored after upgrading SCI has been upgraded, but before rebooting any Swarm Storage nodes.
Run the following command on the SCS node:
scsctl storage config set -d "cip.multicastEnabled=true"
Once this has been run, the command runs successfuly, use a rolling reboot may be safely used to upgrade to the new Swarm Storage storage software.
LimitationsGUI-based upgrade functions well when the cluster is installed using SCI 2.x, with no manual changes in the configuration files (for example, gateway.cfg and elasticsearch.yml). However, this upgrade inherits the changes of SCS, storage, and gateway done through Content Portal and Swarm UI.
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