Devel Digest, Vol 26, Issue 62
Greg Smith (gregmsmi)
gregmsmi at cisco.com
Sun Apr 13 13:50:13 EDT 2008
Hi Dafydd, Sameer, Mel et al,
I put a link here
http://wiki.laptop.org/go/Scenario_taxonomy#Infrastructure_constraints
pointing to Mel's page at:
http://wiki.laptop.org/go/Networking_scenarios
The available networking hardware is one of several metrics which affect
what activities and server software you can/should use.
I suggest that we list all variables and how they interact on the
taxonomy page and then move them or link to them in the deployment
guide: http://wiki.laptop.org/go/Deployment_Guide/Connectivity
Thanks,
Greg S
------------------------------
Message: 4
Date: Sat, 12 Apr 2008 19:11:01 -0700
From: Sameer Verma <sverma at sfsu.edu>
Subject: Re: networking scenarios
To: Dafydd Harries <dafydd.harries at collabora.co.uk>
Cc: devel at lists.laptop.org
Message-ID: <48016BB5.9010405 at sfsu.edu>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Dafydd Harries wrote:
> This is something which was not completely clear to me until I talked
> to Wad about it the other day, and I think other people might find it
> useful. It should probably go on the wiki (assuming it isn't already
> there somewhere). I'd like some feedback about where it belongs. The
> closest thing I've found is this
> page:
>
> http://wiki.laptop.org/go/Scenario_taxonomy
>
>
The wiki page you refer to was my attempt (at least the first cut) at
getting some kind of a scenario taxonomy going. The idea was that if we
could look at different combinations of grid availability and backhaul
availability, we could look at the landscape of scenarios and solutions
that may work for one or more scenarios. For example, a low powered (can
run off a battery) server unit will work for all situations with
unreliable or non-existent grid power, but for a school that has
reliable power (say, Birmingham, AL), setting up a more powerful server
would be possible. The same goes for backhaul. I didn't want to start
with too fine grained a scale, so I didn't specify bandwidth, latency,
etc. and leave the scales at a more qualitative low/medium/high level.
> Any errors are my own.
>
> There are four networking scenarios:
>
> - simple mesh
> - no access point
> - no school server
> - we are currently aiming to support up to 15 laptops in this case
> - simple WiFi
> - access points
> - which tend not to handle multicast very well (1Mbit/s peak)
> - no school server
> - this is what G1G1 laptops will tend to encounter
> - typically in the developed world
> - school mesh
> - no access point
> - school server with Jabber server
> - school WiFi
> - access points
> - school server with Jabber server
> - only one server at a time
> - this is what is deployed in Peru
>
>
Assuming that a matrix such as the one at the bottom of the wiki page
covers most of what we are looking for, each scenario would lead to a
set of technologies (hardware, software, network) for that scenario. We
briefly talked about this at the first phone conference for the server
development.
> Our current priority in terms of collaboration is to improve supprt
> for the fourth case, as this is the situation most of our existing
> laptops are deployed in, and it's likely that upcoming deployments
> will be similar. Our secondary priority is improving support for the
> second case, as this is what will tend happen when laptops are taken
home from school.
>
>
Sameer
--
Dr. Sameer Verma, Ph.D.
Associate Professor of Information Systems San Francisco State
University San Francisco CA 94132 USA http://verma.sfsu.edu/
http://opensource.sfsu.edu/
------------------------------
Message: 5
Date: Sat, 12 Apr 2008 20:20:36 -0700
From: Jeremy Fitzhardinge <jeremy at goop.org>
Subject: Re: XENified images for XO
To: Dennis Gilmore <dennis at ausil.us>
Cc: devel at lists.laptop.org
Message-ID: <48017C04.9000501 at goop.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Dennis Gilmore wrote:
> On Thursday 10 April 2008, Marcus Leech wrote:
>
>> Has anyone done any work on building XENified images for XO?
>>
>> I'm interested in this for building a large-scale virtualized XO
>> environment for testing purposes.
>>
>> The other option is to run the XO image in "HVM" mode, but that
limits
>> which processors
>> I can use to host such a thing.
>>
>> Cheers
>>
>
> The work to do this is not trivial. however, im working on moving us
to a
> Fedora-9 base. in doing so we should rebase the kernel. I understand
> dilinger has done alot of work to make sure we will be able to use
2.6.25 We
> should work with him to make sure that paravirt support in 2.6.25 is
turned
> on.
>
I'm the maintainer of the paravirt-ops Xen support, so tell me if
anything needs doing to make this work.
J
------------------------------
Message: 6
Date: Sun, 13 Apr 2008 10:56:10 +0200
From: "Tomeu Vizoso" <tomeu at tomeuvizoso.net>
Subject: Re: Usability testing
To: "Patrick Dubroy" <pdubroy at gmail.com>
Cc: bens at alum.mit.edu, devel at lists.laptop.org, sugar at lists.laptop.org
Message-ID:
<242851610804130156q5204ab02ga5ef16b6f17d4c0c at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
On Sun, Apr 13, 2008 at 2:37 AM, Patrick Dubroy <pdubroy at gmail.com>
wrote:
> If there's one conclusion we can make here, it's that we could do a
> better job in coordinating our usability efforts. In the next few
> days, I'll try to set up a central place on the wiki that can use to
> do this. Anyone else who is interested in this can feel free to do
so,
> of simply get in touch with me to let me know you're interested.
Thank you very much, the developers have no means to organize such
things, so the only way I see is the community stepping up and
organizing themselves.
I have heard discussions inside OLPC about the need of using usability
testing in order to gather a better understanding of how the UI
decisions work when a kid is finally put in front of Sugar. I think
we'll see at some point OLPC resources dedicated to this task, but I
don't think it's wise to wait for that to happen.
In my opinion, things would work better if an OLPC employee/contractor
is later integrated into an existing wider community effort for
usability improvement, rather than people waiting for things to happen
from OLPC.
Thanks again,
Tomeu
------------------------------
Message: 7
Date: Sun, 13 Apr 2008 15:57:34 +0545
From: Bryan Berry <bryan.berry at gmail.com>
Subject: question about cleaning up custom builds
To: Michael Stone <michael at laptop.org>, OLPC Developer's List
<devel at laptop.org>
Message-ID: <1208081554.6971.21.camel at dell.linuxdev.us.dell.com>
Content-Type: text/plain
Hey Michael,
I am still trying to find a more elegant way to create a custom XO build
but that eludes me. Am learning how the olpc.fth boot process works but
that is going slowly.
Currently I make the following changes to a build before I do save-nand
rm -r /home/olpc/.sugar/default
rm /security/state/var/lib/dbus/machine-id
Are there any other files I need to delete before I do save-nand?
thanks
--
Bryan W. Berry
Systems Engineer
OLE Nepal, http://www.olenepal.org
------------------------------
Message: 8
Date: Sun, 13 Apr 2008 16:01:19 +0545
From: Bryan Berry <bryan.berry at gmail.com>
Subject: working version of Watch and Listen?
To: OLPC Developer's List <devel at laptop.org>
Message-ID: <1208081779.6971.26.camel at dell.linuxdev.us.dell.com>
Content-Type: text/plain
I get 404 not found when I try to access the url listed for Watch and
Listen on the Activities page:
http://staff.osuosl.org/~peter/myfiles/Watch%20&%20Listen-10.xo
Can anyone tell me how stable the version of Watch and Listen is that
lives in git?
http://dev.laptop.org/git?p=projects/watch-listen;a=shortlog;h=master
thanks
--
Bryan W. Berry
Systems Engineer
OLE Nepal, http://www.olenepal.org
------------------------------
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