Multicast Sessions
The core mechanism — one udp-sender transmission that many clients write to
disk at once — is the same on both versions. The difference is reach: on 1.5,
cross-site multicast cannot be made to work by configuration alone, and
concurrent session configuration is more limited.
Which version am I on?
Check FOG Configuration → FOG Settings → General → FOG_VERSION in the web UI, or the version string printed at the top of
installfog.sh.