[6157] in Release_7.7_team
Re: Athena Video Monitor Power Save information for outreach articles.
daemon@ATHENA.MIT.EDU (William Cattey)
Mon Jan 12 18:09:55 2009
In-Reply-To: <200901122307.n0CN7JXV005489@speaker-for-the-dead.mit.edu>
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Cc: Robyn Fizz <fizz@MIT.EDU>, release-team@MIT.EDU
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From: William Cattey <wdc@MIT.EDU>
Date: Mon, 12 Jan 2009 18:08:28 -0500
To: Jonathon Weiss <jweiss@MIT.EDU>
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The reason why I went with 800 systems was that I wasn't sure how
many of those 950 were desktops, and how many were servers that
wouldn't be affected by the change.
-Bill
On Jan 12, 2009, at 6:07 PM, Jonathon Weiss wrote:
>
> Hi Bill,
>
> I actually had a similar conversation with Laxmi this afternoon when I
> ran into her. I dredged up some of our old research and came up with:
>
> Assume 25W/monitor savings (conservative)
> Assume 1000 workstations (actually 956 according to Dec. stats)
> Assume 10 sleeping hours per day (conservative)
> Assume 365 days per year :-)
> Estimated power savings: 91.25MWh
> Using Laxmi's (conservative) blended average cost to MIT of $0.11/kWh
> Estimated cost savings: $10037.05/year
>
> Of course, we really only have 1-2 significant digits, but we can
> reasonably say $10K/year!
>
> Even if we go with 950 workstations (which I don't think is strictly
> required, since we wen't conservative on every other number there) it
> ends up at $9500/year, and cover 85MWh.
>
> Jonathon
>
>
>
>> Robyn,
>>
>> Thanks for the chat today, and for offering to help to get the word
>> out. Here is a first draft of everything that could be said.
>> Perhaps you can suggest some amendments to say it more succinctly.
>>
>> ---- Begin draft ----
>>
>> On Tuesday January 13, 2009, Athena on Linux and Solaris enabled
>> power save mode on its video monitors.
>>
>> Historically, Athena never shut off the video display. A screen saver
>> with the Athena logo enabled an operator to identify dead machines
>> just by glancing into the room. A blank screen meant a broken
>> system. When power saving became standard practice, Athena disabled
>> the power save feature, fearing that people would be too used the
>> Athena convention, "blank monitor means dead Athena Workstation".
>>
>> The power consumed even by a low power LCD display is significant:
>> We expect to save in excess of 75 MegaWattHours of electricity per
>> year. (25 watts per monitor, 10 hours idle time, 900 systems, 365
>> days.)
>>
>> We hope that Athena users will realize that a blank Athena screen no
>> longer means a broken computer, but instead means Athena has finally
>> "gotten with the program" -- that our monitors behave like standard
>> monitors and may need a move of the mouse or the strike of a key to
>> wake up.
>>
>> ---- End Draft ----
>>
>> -Bill
>>
>> ----
>> Important: IS&T IT staff will *NEVER* ask you for your password, nor
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>> ----
>>
>> William Cattey
>> Linux Platform Coordinator
>> MIT Information Services & Technology
>>
>> N42-040M, 617-253-0140, wdc@mit.edu
>> http://web.mit.edu/wdc/www/
>>
>>
>>
>
>
