01-01-2019, 09:35 PM
I can't sign this universally like this. I run a Raid-6 backup server with 10 hard disks and even if several vHosts overpump their LV backups with Gbit I don't have any performance problems. Of course you can find md1_raid6 at the top of the list. Much more resource-hungry are all the deduplication tools on the vHost side.
The performance, however, admittedly falls quite strongly when reading non-sequentially many small files, as is the case with hardlinked file-based backups, for example.
On a productive system which is not used as a pure and large data storage (NAS) I would recommend RAID1 or RAID10 in any case - easier to patch, more performant and less complicated and therefore inherently less error-prone.
The performance, however, admittedly falls quite strongly when reading non-sequentially many small files, as is the case with hardlinked file-based backups, for example.
On a productive system which is not used as a pure and large data storage (NAS) I would recommend RAID1 or RAID10 in any case - easier to patch, more performant and less complicated and therefore inherently less error-prone.