This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
A while ago, Liander – the energy distribution company – wanted to replace both the gas and electricity meters to become “smart” during day time. The server configuration load was heavy enough for Windows to indicate the UPS would last about 30 minutes. At night that’s not much of a problem but during 1 hour replacement day-time it would be a problem.
So I bought a SUA48XLBP battery pack (and a SUA039 cable as the cable wasn’t long enough to keep an inch or so air space between UPS and battery pack) so the battery would last about 3 times as long.
Windows would still show it would last about 30 minutes. Strange. So I started looking around and it appeared the SUA3000XLI needed calibration which requires PowerChute. Since PowerChute won’t work, I was almost back at square 1. Almost, as I know knew it required calibration.
In the past I had come across apcupcd but that was a long time ago when it supported a limited set of operating systems and a limited set of features so I never installed it.
But when searching how to calibrate the without using PowerChute, it quickly appeared that the apctest part of apcupsd can do just that: soft calibrate the UPS/battery combo. There are some steps and prerequisites (the most important ones are to turn off the apcupsd and provide enough load and 100% battery charge at start).
Spoiler: the combined UPS/battery-pack now lasts for almost 2 hours which is long enough.
Installing apcupsd
I’m describing this from a Windows perspective and it’s dead easy:
After zypper dup (dist-upgrade) or zypper up (update) a zypper ps will list processes using deleted files (i.e. processes that likely need to be restarted).
Some processes that can be restarted without reboot:
Think twice before you give VMs extra vCPUs which they don’t really need. You can negatively impact the performance of your environment since the vmkernel has to try and find a time slot in which it can give all vCPUs access to the physical cores.
Interesting stuff to play with the next few weeks:
This version of the ESXi Embedded Host Client is written purely in HTML and JavaScript, and is served directly from your ESXi host and should perform much better than any of the existing solutions.