On 13/11/21 5:56 am, Rich Freeman wrote: > On Wed, Nov 10, 2021 at 11:06 PM Mark Knecht <markkne...@gmail.com> wrote: >> >> Not a recommendation precisely but there's a guy on YouTube named Jeff >> Geerling that's doing a lot of that sort of thing using a Raspberry Pi and >> multiple SATA drives. I've just built my first RP4 box aimed at >> astrophotography and I'm pretty impressed with how well the Pi works. My >> next project will likely be some sort of NAS box using a second Pi4 with an >> M.2 system drive. >> > I run LizardFS and at this point Pi4s are my preferred hardware for > storage nodes. However, I don't deal with much IOPS. I tend to use > USB3 hard drives for convenience/cost. Really though SATA on a Pi4 > wouldn't be super-ideal anyway due to the lack of PCIe (I think it > lacks it at least). You can find ARM SBCs that have PCIe capable of > handling an HBA which are probably better if you want a bunch of SATA > drives, though those have their downsides. If you're serious about > IOPS I'm not sure anything cheap will do the trick. Look at the odroid HC4 - I am using 5x the older HC2 version for moosefs - they are USB3 based but work well in this application. They are arm32 but 64bit is not needed. > I would definitely avoid Pi2/3 for this due to the combo of 100MBps > networking and USB2 and a lot of the IO goes through USB2 in the first > place. It is just not a very good setup for IO at all, and there are > much better alternatives. The Pi4 though is pretty solid as long as > you don't mind USB3 (and it has two hosts so you can basically run 4 > spinning disks all-out without a performance hit until you get to the > network at least).
I have a pi3B - bad idea to use this for any DFS - I tried... I am using an Odroid C4 for directly connected USB3 disks - works well. > Gigabit network is its own bottleneck for any kind of storage. I'm > too cheap to try to use anything better, but anybody doing serious DFS > is going to want 10Gbps, or often dual 10Gbps.
