We have had a lot of posts and photos about people’s storj rigs, but in today’s climate, the energy costs of a system is becoming far more important.
I would say that the best numbers would be as I detail below for dedicated systems. For someone that is operating a shared storage system such as a NAS such costing does not make sense, but someone may be able to work out their extra costs if they have an environment where the disks would spin down if there was not a constant load from storj processing.
System - Pi4, external 12TB drive and USB hub.
Total system power draw - 16W
power draw per TB stored (6.17TB) - 2.6W
power draw for a full node (12TB) per TB - 1.3W
My interest comes from the long term running costs of a node as energy prices keep rising. A 16W power draw means a yearly total draw of 140kWh. Last year this cost me around £13, this year £20 and next year when I renew my contract it could be £50 if not more.
System - Supermicro server, 2x Xeon X5687, 108GB RAM, 4U with 24 hard drive slots and two power supplies, 12 7200RPM drives (6x4TB + 6x6TB) used in the pool that stores Storj data (and some other stuff).
Total system power draw (currently) - 362W (it jumps around somewhat)
power draw per TB stored (19TB) - 19W
power draw for full node assuming I do not add more drives (~32TB) - 11.3W
I use the server for other stuff, not just Storj (though if I did not run a node, I probably would do some things differently)
System Tyan server, 2x Xeon L5640, 114GB RAM, 2U 12x 3.5" BAYS Single PSU.
disk shelf with 24 Bays… 30 disk’s in the system, but many not used for Storj and server being used for other purposes also.
Total system max draw…less than 400 to 500watts
unsure server itself is between 220 and 300 depending on cpu load.
the disk shelf is between 30-40 idle and empty, really should get that measured with disks.
but i would expect it to be less than 24 x 6 watts (which is the hdd max draw(according to spec) so 140 + idle of the shelf.
(might update this when i do some measurements in the near future.)
total usable storage 86TB / 400 to 500 watts
Watts pr TB capacity = 4.6 to 5.8 (after raid redundancy and disk partitioning)
might be lower will need to measure it exactly.
been trying to improve my TB to wattage ratio, because my power is pretty expensive here.
also thought about maybe setting up some solar cells for it.
A HP Microserver of an older generation with four drives totaling 14TB, most (but not all) for Storj. 50W total measured at the wall, so about 3.5W/TB. Thinking of getting one larger drive next Black Friday. I could theoretically go for a set of 4×18TB with almost the same power draw, but I just don’t need that much space, nor Storj would be able to fill it.
True, many drives will park their r/w heads if not dealing with requests and sit in an Idle state/mode, but the real power saving comes from any situation where they can stop the spinning of the drive.
This is a nice write up on the subject from the days when disk capacity was in the GB range, rather than TB.
It depends on how you count. For me it’s really not a factor, I use only systems that were already online 24/7. I did actually test the difference between running the nodes and not running them and that added up to about 5W difference.
So 5W/19TB=0.26W per TB
Total system power is about 105W. So if you count it all it would be 5.5W per TB. But to me that doesn’t make sense, since I would be paying for 100W even without Storj running.
No, the marginal cost is the right cost to use in such a situation - the extra cost to perform an extra task, so for you, it does not matter how much your platform costs in terms of energy usage for it to perform its main/primary task, just how much extra energy is used to also do Storj based tasks.
This is one of the reasons why I said we should just compare the energy costs of our systems as other marginal costs - such as disk space or system wear and tear are far harder to generalize.