Hi there, I am trying to setup a high-availability high-performance Storage and I have no idea where to start at all. and I have a list of question i hope you could help me with.

Do i need SAN or DAS that connect to multiple control node?
What file system? and I want to avoid Lusterfs
What hardware do i need?
What Os do i use? i ideally want to use truenas but i am comfortable with another distro.

the storage need to beable to scale to petabyte level and ideally FAST