Am 11.08.20 um 18:23 schrieb Roman Mamedov: > On Tue, 11 Aug 2020 00:42:33 -0400 > George Rapp <george.rapp@xxxxxxxxx> wrote: > >> Use case is long-term storage of many small files and a few large ones >> (family photos and videos, backups of other systems, working copies of >> photo, audio, and video edits, etc.)? Current usable space is about >> 10TB but my end state vision is probably upwards of 20TB. I'll >> probably consign the slowest working disks in the server to an archive >> filesystem, either RAID 1 or RAID 5, for stuff I care less about and >> backups; the archive part can be ignored for the purposes of this >> exercise. >> >> My question is: what filesystem type would be best practice for my use >> case and size requirements on the big array? (I have reviewed >> https://raid.wiki.kernel.org/index.php/RAID_and_filesystems, but am >> looking for practitioners' recommendations.) I've run ext4 >> exclusively on my arrays to date, but have been reading up on xfs; is >> there another filesystem type I should consider? Finally, are there >> any pitfalls I should know about in my high-level design? > > Whichever filesystem you choose, you will end up with a huge single point of > failure, and any trouble with that FS or the underlying array put all your > data instantly at risk. calling an array where you can lose *two* disks as single-point-of-failure is absurd no raid can replace backups anyways > Most likely you do not. And the RAID's main purpose in that case is to just > have a unified storage pool, for the convenience of not having to manage free > space across so many drives. But given the above, I would suggest leaving the > drives with their individual FSes, and just running MergerFS on top: > https://www.teknophiles.com/2018/02/19/disk-pooling-in-linux-with-mergerfs/ you just move the complexity to something not used by many people for what exactly to gain? the rives are still in the same machine "Secondly -- if all of this... is BACKED UP ANYWAY, why even run RAID?" is pure nosense! the best backups are the ones you never need and before i setup up something where a dying drive take smore actions then swap iot i would commit suicide
