On 2/10/22 08:11, Matti Pulkkinen wrote:
TL;DR are there particular workloads that suffer from having to access a RAID0 array?
If uptime is excluded as a factor, then I'm not aware of any.
I've currently got my /home partition in a BTRFS RAID0 array with two 1 TB mechanical drives, and I'm considering getting SSDs for /home instead. I could get one 2 TB SSD and be happy with it, but I could instead get two 1 TB SSDs and make a RAID0 array again. The latter option would of course get me better overall throughput
It *probably* will, but I think there are conditions under which it wouldn't. One SSD might be able to saturate your controller for reads. Interleaved writes will probably improve, but that might depend on how many cells are in each SSD, and how the SSD's controller spreads writes among them. If you're looking at QLC drives, it might depend somewhat on whether the 1TB drives together have more SLC cells than the 2TB drive has.
Which is to say that if you haven't actually tested *your workload* on it, then there's some risk. You're probably not going to save much on the purchase, you're going to have slightly less reliable storage, and there's a small chance that performance won't be much better than a single drive.
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