similar to AIX in complexity
A full bore fault tolerant redundant AIX setup with dual HMCs, SAN farm, failover dual or more VIOs is another way to achive high complexity and resilience if organisation has done staff training. Can be very robust so complexity is no longer a point of failure _if_ IT staff understand it. And therein lies the rub; how many organisations train now ? Very few new IT staff will pay multiple $5000 course fees in the hope they might get a job. Good to see alternative technologies coming on anyway. IMHO, still a lottery which will become dominant. Often not the best.