Power rebalance and upgrade project
May 5, 2014by admin
I have ordered new UPS batteries for all the 3000VA UPSes – they’re three years and four months old, according to this blog – I blogged the last time I replaced them. That makes me feel old. Also I have ordered a nice 0U metered PDU that should be able to power most of Rack 1, and the other 0U PDU on the other side can do the rest. I hope that between these two things, there will be no more power strips hanging out behind the racks, and I should be able to properly balance and use all the power available.
May 9th, 2014 at 11:42 am
We (Dan and I) have replaced all the batteries, gotten rid of all power strips, and balanced power across all UPSes and PDU’s. All nodes are plugged either into a UPS or the 208v PDU, and nothing is running at more than 80% capacity at full load, as measured by some of Tom’s runs and dnetc concurrently running on the cluster right now. I’m happy. We had to run compute-1-17,18,1, and 2’s power cables across the top and over to the 3000VA UPSes to make this work, but that’s fine – at least we have no cables running across the floor anymore!
May 9th, 2014 at 12:49 pm
Hm. compute-1-10 just died running dnetc only… checking it out…
May 9th, 2014 at 1:13 pm
Old crappy power supply died. Replaced with Antec 400W from old white yurt tower server.
May 16th, 2014 at 10:06 am
Power balance seems to be good now. No issues recently, other than perhaps slightly overpowering our A/C.