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In "Anthony is a consumer" news, four 2 Tbyte SSDs that I got for cheap on ebay arrived yesterday. Now I need to figure out how best to arrange them into a storage cluster. I prefer ZFS mirrored arrangements but I covet the space that you'd lose and I don't worry as much about reliability for this particular one. So maybe I'll go with ZFS RAIDZ.
@abucci I use ZFS-RAIDZ2 myself on my array.
@abucci I use ZFS-RAIDZ2 myself on my array.
@abucci I use ZFS-RAIDZ2 myself on my array.
@abucci I use ZFS-RAIDZ2 myself on my array.
@prologic I'm personally not a fan of RAID-anything, having been burned by it once. I don't know if you had a chance to read the article I linked arguing in favor of mirroring over RAID, but I found that guy's reasoning compelling. It drastically reduces resilvering time and does not introduce load onto any other vdev except the one(s) in the mirror during resilvering. That's a big deal because a particularly bad failure mode of RAID is that you lose a disk, and then the parity computations necessary to replace that disk introduce extra load on all the other disks in the array, which can hasten the failure of one of *those*, and you end up with a cascade of disk failures that result in data loss. This happened to me once years ago and it sucks. That's why I went with mirroring for my own cluster. But I'm still a bit torn.
@abucci I guess as you said, pros/cons right? I'm planning on buying a secondary NAS (also running ZFS) and I'm tossing up between whether I go with a 2-way mirrored vdev setup or RAID-Z1. I mean if you have decent backups, there's no worry right? 🤔 Just potential downtime of "data".
@abucci I guess as you said, pros/cons right? I'm planning on buying a secondary NAS (also running ZFS) and I'm tossing up between whether I go with a 2-way mirrored vdev setup or RAID-Z1. I mean if you have decent backups, there's no worry right? 🤔 Just potential downtime of "data".
@abucci I guess as you said, pros/cons right? I'm planning on buying a secondary NAS (also running ZFS) and I'm tossing up between whether I go with a 2-way mirrored vdev setup or RAID-Z1. I mean if you have decent backups, there's no worry right? 🤔 Just potential downtime of "data".
@abucci I guess as you said, pros/cons right? I'm planning on buying a secondary NAS (also running ZFS) and I'm tossing up between whether I go with a 2-way mirrored vdev setup or RAID-Z1. I mean if you have decent backups, there's no worry right? 🤔 Just potential downtime of "data".
@prologic It's always a trade off of some kind, but I think a lot of people overlook the risk of cascading disk failures in RAID setups. I had this happen to me and lost data because of it, so I'm risk averse I guess and I'd rather trade space for resilience most of the time.