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