491 reputation
1822
bio website econemon.com
location Berlin, Germany
age 34
visits member for 5 years, 7 months
seen Mar 21 at 12:34

I'm running my own startup which sells software to help companies monitor their energy consumption in detail. My programming tasks center on the Java / OSGi backend and a web-based GUI that is currently being migrated from ActionScript / Flash to JS / AJAX.


Nov
11
comment Power and Cooling Cost compared with Server/Hardware Cost
A PUE of 2.6, sadly, is high, but not a total outlier. And what type of hardware you use for your servers is only a fraction of the story. There's plenty of stuff that you can do about how you cool the servers, and it makes a huge difference. I once listened to a talk on an IT conference where one company explained how they ran their datacenter at a room temperature of 40° C with commodity hardware and a quite unorthodox, but very professional approach to cooling.
Nov
11
comment Power and Cooling Cost compared with Server/Hardware Cost
To be accurate, a PUE of 2.6 means for every Watt going into your server, 1.6 Watt go into infrastructure and cooling. See for example google.com/corporate/green/datacenters/measuring.html
Nov
11
comment Power and Cooling Cost compared with Server/Hardware Cost
@TomTom - Having a PUE of 1.39 sadly isn't even close to common. 2 and more still seems the rule. If there's a way to share how your datacenter operates in that regard, this could probably serve as a guidance for many others.
Nov
11
revised Power and Cooling Cost compared with Server/Hardware Cost
typo
Aug
20
comment What do local IT support personnel need from a program that addresses green computing?
Go support my site proposal at area51.stackexchange.com/proposals/15640/… to create a great site for all energy efficiency questions.
Aug
20
comment How can I shut down (power off) cluster nodes during low load?
Go support my site proposal at area51.stackexchange.com/proposals/15640/… to create a great site for all energy efficiency questions.
Aug
20
comment What have you done, as a system administrator, for ecology?
Go support my site proposal at area51.stackexchange.com/proposals/15640/… to create a great site for all energy efficiency questions.
Aug
20
comment How have you saved green by going green?
Go support my site proposal at area51.stackexchange.com/proposals/15640/… to create a great site for all energy efficiency questions.
Aug
20
revised What have you done, as a system administrator, for ecology?
deleted 3 characters in body
Aug
20
comment How have you saved green by going green?
Go support my site proposal at area51.stackexchange.com/proposals/15640/… to create a great site for all energy efficiency questions.
Jun
4
asked I want to set up a DynDNS service, what do I need to know?
May
1
awarded  Yearling
Apr
30
comment What have you done, as a system administrator, for ecology?
In fact, the main problem with room temperatures above 25 °C is that the people who have to go in there will feel very hot.
Apr
30
comment What have you done, as a system administrator, for ecology?
I told the full story in another answer (serverfault.com/questions/16383/…). It really seems far-fetched, but if you remember that it's really the temperature on the CPUs etc. which is important, then you'll find that it can be done. A CPU, for instance, can easily work at 50-60 °C.
Apr
30
answered Will wear induced by turning computers off in the evening be offset by energy savings?
Apr
30
comment How do I calculate cooling cost per server?
And actually, the scientific rationale behind it is just as easy: energy is never destroyed, or lost, so all you do is bring in energy as electricity and take it out as heat, after it has done its work.
Apr
30
answered Power and Cooling Cost compared with Server/Hardware Cost
Apr
30
answered How have you saved green by going green?
Apr
30
revised What have you done, as a system administrator, for ecology?
The question I linked to is no longer up, so I rewrote the post and plugged some advertising
Apr
15
awarded  Popular Question