> A friend points out that IBM Z mainframes have a bunch of the resiliency software and hardware infrastructure I mention,
Sure its expensive, and you have to deal with IBM, who are either domain experts or mouth breathers. Sure it'll cost you $2m but!
the opex of running a team of 20 engineers is pretty huge. Especially as most of the hard bits of redundant multi-machine scaling are solved for you by the mainframe. Redundancy comes for free(well not free, because you are paying for it in hardware/software)
Plus, IBM redbooks are the golden standard of documentation. Just look at this: https://www.redbooks.ibm.com/redbooks/pdfs/sg248254.pdf its the redbook for GPFS (scalable multi-machine filesystem, think ZFS but with a bunch more hooks.)
Once you've read that, you'll know enough to look after a cluster of storage.
Sure its expensive, and you have to deal with IBM, who are either domain experts or mouth breathers. Sure it'll cost you $2m but!
the opex of running a team of 20 engineers is pretty huge. Especially as most of the hard bits of redundant multi-machine scaling are solved for you by the mainframe. Redundancy comes for free(well not free, because you are paying for it in hardware/software)
Plus, IBM redbooks are the golden standard of documentation. Just look at this: https://www.redbooks.ibm.com/redbooks/pdfs/sg248254.pdf its the redbook for GPFS (scalable multi-machine filesystem, think ZFS but with a bunch more hooks.)
Once you've read that, you'll know enough to look after a cluster of storage.