[Cerowrt-devel] [Bloat] Dave Täht quoted in the ACLU blog
dave.taht at gmail.com
Sat Jun 28 00:28:55 EDT 2014
On Fri, Jun 27, 2014 at 9:06 PM, David P. Reed <dpreed at reed.com> wrote:
> Maybe I am misunderstanding something... it just took my Mac book Pro doing
> an rsync to copy a TB of data from a small NAS at work yesterday to get
> about 700 Gb/sec on a GigE office network for hours yesterday.
> I had to do that in our Santana Clara office rather than from home outside
> Boston, which is where I work 90% of the time.
> That's one little computer and one user...
On a daily basis, the bufferbloat websites transfer far, far less than gigE
IF the redmine portion of the site wasn't so cpu expensive, I could
other than hefty boxes they are on. Similarly snapon's cpu is mostly
used for builds, the file transfer role could be done by something else
easily. I'd like to switch it over to do that one day.
> What does my Mac Book Pro draw doing that? 80 Watts?
I love the "kill-a-watt" products. I use them everywhere. (while I'm
pimping stuff I like, digilogger's power switches are a lifesaver also -
staging boots for devices that draw a lot of power in a tiny lab that
can only draw 350 watts before becoming a fire hazard)
Your NAS probably ate less than 16 watts, more if you have more than one drive.
My nucs draw 18 watts and can transfer at GigE off a flash disk
without raising a sweat.
(at least some of your overhead is in the rsync protocol, which is
Several tiny arm boards can all do gigE at line rate, notably stuff built around
marvell and cavium's chipset(s), and they do it at under 2 watts. Most support
64GB mini-sd cards (with pretty lousy transfer rates).
Pretty sure (haven't booted it yet) the parallella (which is smaller
than a drive),
can do it in under a 2 watt, and if it doesn't do gigE now, it'll do
it after I get through
with it - but it lacks a sata port, and usb is only 2.0, so it might
not drive gigE
from a nas perspective. (It kind of bugs me that most of the tiny boards are in
the altoids form factor, rather than the 2.5 inch drive form factor)
So I go back to my original point in that, once you have fiber to the business,
for most purposes in a small business or startup or home - who needs
to co-lo in a data center?
You can have a tiny wart on the wall do most of the job. And that's
today. In another
year or so we'll be over some more tipping points.
One thing that does bug me is most UPSes are optimized to deliver a large
load over a short time, a UPS capable of driving 5 watts for, say, 3 days is
kind of rare.
> On Jun 27, 2014, David Lang wrote:
>> On Tue, 24 Jun 2014, Michael Richardson wrote:
>>> Rick Jones wrote:
>>>> Perhaps, but where does having gigabit fibre to a business imply the
>>>> has the space, power, and cooling to host all the servers it might
>>>> to have?
>>> That's a secondary decision.
>>> Given roof space, solar panels and/or snow-outside, maybe the answer is
>>> I regularly have 2 our of 3 of those available in a decentralized way.
>> given the amount of processing capacity that you can get today in a
>> cooled system, you can do quite a b it of serving from a small amount of
>> and power.
>> The days when it took rooms of Sun boxes to saturate a Gb line are long
>> you can do that with just a handful of machines.
>> David Lang
>> Cerowrt-devel mailing list
>> Cerowrt-devel at lists.bufferbloat.net
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