I wonder if my system is good or bad. My server needs 0.1kWh.
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For two servers (one with a lot of spinning rust), two switches, and a few other miscellaneous network appliances. My server rack averages around 600-650W. During periods of high demand (nightly backups, for instance), that can peak at around 750W.
Wow, that sounds like I have rookie numbers
AiBot post. Fuck this shit.
Can you please explain?
Mate, kWh is a measure of electricity volume, like gallons is to liquid. Also, 100 watt hours would be a much more sensical way to say the same thing. What you’ve said in the title is like saying your server uses 1 gallon of water. It’s meaningless without a unit of time. Watts is a measure of current flow (pun intended), similar to a measurement like gallons per minute.
For example, if your server uses 100 watts for an hour it has used 100 watt hours of electricity. If your server uses 100 watts for 100 hours it has used 10000 watts of electricity, aka 10kwh.
My NAS uses about 60 watts at idle, and near 100w when it’s working on something. I use an old laptop for a plex server, it probably uses like 50 watts at idle and like 150 or 200 when streaming a 4k movie, I haven’t checked tbh. I did just acquire a BEEFY network switch that’s going to use 120 watts 24/7 though, so that’ll hurt the pocket book for sure. Soon all of my servers should be in the same place, with that network switch, so I’ll know exactly how much power it’s using.
Between 50W (idle) and 140W (max load). Most of the time it is about 60W.
So about 1.5kWh per day, or 45kWh per month. I pay 0,22€ per kWh (France, 100% renewable energy) so about 9-10€ per month.
Are you including nuclear power in renewable or is that a particular provider who claims net 100% renewable?
Net 100% renewable, no nuclear. I can even choose where it comes from (in my case, a wind farm in northwest France). Of course, not all of my electricity come from there at all time, but I have the guaranty that renewable energy bounds equivalent to my consumption will be bought from there, so it is basically the same.
Thanks. I buy Vattenfall but make net 2/3rds of my own power via rooftop solar.
80-100 watts at idle which is most of the time. Two OS drives, two fast drives, two spinners, lots of networking and always syncing with the rest of the cluster.
Is there a (Linux) command I can run to check my power consumption?
If you have a server with out-of-band/lights-out management such as iDRAC (Dell), iLO (HPe), IPMI (generic, Supermicro, and others) or equivalent, those can measure the server’s power draw at both PSUs and total.
If you have a laptop/something that runs off a battery,
upowerGet a Kill-a-Watt meter.
Or smart sockets. I got multiple of them (ZigBee ones), they are precise enough for most uses.
17W for an N100 system with 4 HDD’s
That’s pretty low with 4 HDD’s. One of my servers use 30 watts. Half of that is from the 2 HDD’s in it.
@meldrik @qaz I’ve got a bunch of older, smaller drives, and as they fail I’m slowly transitioning to much more efficient (and larger) HGST helium drives. I don’t have measurements, but anecdotally a dual-drive USB dock with crappy 1.5A power adapter (so 18W) couldn’t handle spinning up two older drives but could handle two HGST drives.
Which HDDs? That’s really good.
Seagate Ironwolf “ST4000VN006”
I do have some issues with read speeds but that’s probably networking related or due to using RAID5.
With everything on, 100W but I don’t have my NAS on all the time and in that case I pull only 13W since my server is a laptop
My server uses about 6-7 kWh a day, but its a dual CPU Xeon running quite a few dockers. Probably the thing that keeps it busiest is being a file server for our family and a Plex server for my extended family (So a lot of the CPU usage is likely transcodes).
My server rack has
- 3x Dell R730
- 1x Dell R720
- 2x Cisco Catalyst 3750x (IP Routing license)
- 2x Netgear M4300-12x12f
- 1x Unifi USW-48-Pro
- 1x USW-Agg
- 3x Framework 11th Gen (future cluster)
- 1x Protectli FE4B
All together that draws… 0.1 kWh… in 0.327s.
In real time terms, measured at the UPS, I have a running stable state load of 900-1100w depending on what I have at load. I call it my computationally efficient space heater because it generates more heat than is required for my apartment in winter except for the coldest of days. It has a dedicated 120v 15A circuit
Good lord, how much does electricity cost where you are? Combined with the air conditioning to keep the space livable, that would be prohibitively expensive for me
Yeah it’s a bit of a chonk. I don’t remember the exact itemization on the power bill and I don’t have one in front of me.
It’s always wild reading the power draw people wrote here.
I knew it was because this is a US & Europe centric site and many people from homelabs actually run Enterprise size rigs, but my 4 member household run on 2kW for the entire house lol and 75℅ of that is just A/C we use at night.
My household of 7 averages 900 watts year-round.
On cold winter days, we can average 6kW over 24h, but peak is more like 10 I’d 13. Not talking just about my space heaters with embedded computing power and TBs of storage, but the whole household.
80-110W
My 10 year old ITX NAS build with 4 HDDs used 40W at idle. Just upgraded to an Aoostart WTR Pro with the same 4 HDDs, uses 28W at idle. My power bill currently averages around US$0.13/kWh.
My home rack draws around 3.5kW steady-state, but it also has more than 200 spinning disks
What are you hosting?
I think I would go over 10 kW if I fire up everything. Only obout 80 spinny plates of rust though.
My servers (an old desktop overstuffed with drives and an old dell laptop), networking gear and a 50 gal aquarium all run on the same outlet. As long as the aquarium heater is off, the outlet pulls about 200 watts. The aquarium heater spikes that to 400 watts when it kicks in.
About 700 watts, it makes for a decent space heater in the winter.
I’m right around the same level, and it actually keeps my server room / workshop at comfortable temperature during the winter. I also have my gaming PC mounted in my server rack; when that’s running, there are times where my AC will still kick in even when it’s 40 degrees outside.
