[Server-devel] Server-devel Digest, Vol 76, Issue 21

[Anish Mangal]

Perhaps another avenue to explore could be SSHD's (a hybrid of SSDs and
HDD's). They would cost significantly less than an SSD (a 500GB SSHD
retails $80), yet meager on power consumption about 2.5-3W better than an
HDD, 1-1.5W worse than an SSD.


On Sat, Aug 17, 2013 at 5:35 AM, Anish Mangal <anish at activitycentral.com>wrote:

>
> On Aug 17, 2013 5:02 AM, "Adam Holt" <holt at laptop.org> wrote:
> >
> > On Sat, Aug 17, 2013 at 2:16 AM, Jerry Vonau <jvonau at shaw.ca> wrote:
> >>
> >> On Sat, 2013-08-17 at 07:40 +0200, Tony Anderson wrote:> By the way,
> the need for the school server is closer to 50 hours per
> >>
> >> > week than 24/7. Normally it needs to be booted only during the hours
> >> > when children are in school.
> >>
> >> Valid point, that should be taken into account when calculating total
> >> power requirements.
> >
> >
> > Certainly this changes dramatically in orphanage-school environments in
> Haiti, where I and volunteers are finding newfound success.
> >
> > Kids need to read in the evenings (and unforeseen times) on their XOs,
> from http://internet-in-a-box.org and most importantly much younger
> material, rare colorful ebooks we've been granted in Creole.
>
> I think this may be the case in a few other places as well. For example in
> Bhagmalpur, the school server isnt deployed at a school but a somewhat
> central location in the village and the children can access the server
> anytime, not just during school hours.
>
> Also one might think that the XS consumes negligible power when compared
> with 50 xo laptops but keep in mind that the server needs to come across as
> an 'always on' appliance, including all the wireless APs. Thus while the
> laptops might be used for, say 2-3 hours a day. An XS must be kept on
> always, along with the hard disks, and along with all the wireless APs. In
> such a scenario I would say the the XS preferably have its own power supply
> and backup system.
>
> >
> > So 100 hours/week or 24x7 appears to be the need (in this dominant Haiti
> use case) across the growing number of "true community schools" where we're
> working with in Haiti, some orphanages, some not.  This is certainly a
> change from when Tony helped us so much in Haiti 2 years ago, as 1 unique
> school.  Now Haitian schools are ask us for "digital library" service
> morning, afternoon and evening.
> >
> > And while we're certainly not always able to provide this, George Hunt
> and others are doing our best to MoE (movin' our electrons ;) when the
> Right to Read is so central to so many things. EG. we have 5000 books
> sitting in a warehouse near LA that tragically cannot be shipped to Haiti
> due to shipping costs -- meanwhile lowpower XS(CE) digital libraries
> purring through most evenings appear to be unlocking this central problem,
> long before the boat arrives from LA years later.
> >
> > --
> > Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !
> >
> > _______________________________________________
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> > Server-devel at lists.laptop.org
> > http://lists.laptop.org/listinfo/server-devel
> >
>
>
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