Hello List, i used to build 3 Node Cluster with spinning Rust and later with (Enterprise) SSDs. All i did was to buy a 19" Server with 10/12 Slots, plug in the Disks and i was done. The Requirements were just 10/15TB Disk usage (30-45TB Raw). Now i was asked if i could also build a cheap 200-500TB Cluster Storage, which should also scale. Just for Data Storage such as NextCloud/OwnCloud. Buying 3x 24 Slot Server with 8TB Enterprise SSDs ends up at about 3x 45k EUR = 135k EUR. Where the SSDs are 90% of the price. (about 1.700EUR per 8TB SSD) How do the "big boys" do this? Just throw money at it? Would a mix of OSD SSD Metadata + Spinning Rust do the job? My experience so far is that each time i had a crash/problem it was always such a pain to wait for the spinning rust. Do you have any experience/hints on this? Maybe combine 3x 10TB HDDs to a 30TB Raid0/striping Disk => which would speed up the performance, but have a bigger impact on a dying disk. My requirements are more or less low IO Traffic but loads of disk space usage. Any hints/ideas/links are welcome. Cheers, Michael