[krylon]

I never used it myself, but I was told DEC had transplanted at least part of the clustering tech to Tru64.

Of course, that got cancelled after HP bought Compaq/DEC and did not want to support two Unix systems. IIRC, they promised to port the cluster stuff to HP-UX, but it looks like that never happened.

[pjmlp]

I really liked Tru64, as it was one of the first UNIXes that took security seriously, but sadly it was killed as you point out.

However at least HP-UX got one of the very first container models, HP-UX Vaults, already in late 1990's.