On 3/1/20 6:33 AM, Rich Freeman wrote:
On Sun, Mar 1, 2020 at 2:13 AM William Kenworthy <bi...@iinet.net.au> wrote:
Keep in mind that rpi are not the only cheap, capable arm hardware out
there.
I completely agree. Anytime I'm looking at an application I consider
the SBCs available as options. Certainly the odroids are highly
spoken of.
Main advantage of the Pi is its ubiquity - just about anything you
could want is already packaged and documented for it. It is also
pretty cheap.
backed by an Odroid HC2 moosefs cluster (though I am using an intel
powered Odroid H2 for the master).
I considered an HC2 for lizardfs. My problem with it is that it has a
single SATA port, which means you're buying a $50 SBC for every hard
drive in your cluster.
For a single drive per node it is probably your best bet. However, my
chunkservers are:
~$65 RockPro64
$20 used LSI HBA
$5 wall wart
$25 cheap ATX PSU
$5 ATX power switch
$5 extra SATA cables
$5 powered 16x PCIe riser cable (these are a bit hard to find)
That is ~$125, and will support 16 hard drives. You're saving money
on the 3rd drive per node. If you want some kind of enclosure for the
drives you'll pay maybe another $5/drive.
The other option that might be worth considering if you don't mind
losing some bandwidth to the drives is just using SATA3 and hubs/etc
and external drives. I'm shucking external drives anyway. So, any
SBC with a SATA3 port would work for that, with nothing else needed.
I could see USB3 bandwidth (shared) being a constraint if you're
rebuilding, but it would keep up with gigabit ethernet.
Oh, and for any kind of NAS/etc solution make sure that whatever you
get has gigabit ethernet. The Pi3s at least don't have that - not
sure about the Pi4. Wouldn't help in a Pi3 anyway as I think the LAN
goes through the internal USB2 bus - the Pi is pretty lousy for IO in
general - at least conventional PC IO. That GPIO breakout is of
course nice for projects.
I was reading the Pi4 has true gigabit now, thanks to its USB3 ports.
Dan
