[Sugar-devel] Impact of the Sugarizer School Box | Rishabh Nambiar |

Walter Bender walter.bender at gmail.com
Sun Mar 4 10:00:14 EST 2018

Might be nice to include an instance of the Turtle/Music blocks server as
well. We are preparing a new release of the server/clients over the next
few days.


On Sat, Mar 3, 2018 at 3:51 PM, Rishabh Nambiar <rishabhn at protonmail.com>

> Thank you so much for the detailed insight and the metrics, Tony.
> All of this information will be extremely valuable for me while thinking
> of my proposal.
> I'll dive into workload characterization and keep you posted as this is of
> interest to you, thank you so much for your time :)
> Rishabh.
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On March 3, 2018 9:33 AM, Tony Anderson <tony_anderson at usa.net> wrote:
> This is exactly how the xsce server works so you may get valuable help
> from that community (xsce or iiab).
> A continuing issue is performance of the server in a classroom or school.
> One metric is the number of simultaneous connections the device can support
> (a classroom of 40-60 is not uncommon). Response time to requests to the
> server can be limited by the size of memory, the speed of access to the sd
> card, or the processor speed. I would be very interested in the methodology
> you propose since that process would apply equally to the schoolserver.
> One issue is to characterize the workload - how often does a user request
> a transaction from the server, what is the time between requests (when the
> user is reading the response to the previous request), how much processing
> is required for a request (e.g. a text search), how much information is
> required to satisfy a request (e.g. size of file download). So far as I
> know no one has attempted this characterization for a classroom. This load
> could be different for Sugarizer than for Sugar, but the effort would be
> valuable in any case).
> Tony
> On Friday, 02 March, 2018 11:16 PM, Rishabh Nambiar wrote:
> Hi everyone,
> I had a quick chat with Michaël about moving forward with this GSoC
> project where he mentioned that the impact of the project should be
> discussed with the community:
> *http://lists.sugarlabs.org/archive/sugar-devel/2018-February/055078.html*
> <http://lists.sugarlabs.org/archive/sugar-devel/2018-February/055078.html>
> *http://lists.sugarlabs.org/archive/sugar-devel/2018-February/055079.html*
> <http://lists.sugarlabs.org/archive/sugar-devel/2018-February/055079.html>
> *Impact of the Sugarizer School Box*
> An instructor walks into a classroom, equipped with a Raspberry Pi 3 or
> Zero W with a pre-installed version of the proposed Sugarizer School Box
> distribution that Sugar Labs will be working on.
> He/she simply connects the Pi to a power supply and instantly, a local
> WiFi network is set up, a Sugarizer server session starts automatically and
> they’re ready to go!
> Students can log in to the WiFi AP made by the Pi and visit sugarizer.org
> (any other fixed url) on their local tablets/laptops/phones. So any
> computer connected to this WiFi can use the Sugarizer client and any
> tablet/phone with Sugarizer apps will benefit from the collaboration and
> backup features on the server. All of these student devices will be served
> by the Pi Wifi AP.
> *Issues*
> Processing Power
> We’ll have to see how the Pi’s can cope with the load of serving multiple
> students along with the overhead of running a browser session for a client
> and the connected display.
> I have a Raspberry Pi B+ and a Pi Zero W at my disposal that I can use to
> test this so I’ll post the results of combining sugarizer-server and a WiFi
> AP soon. It should do the job as we will not be having too many students on
> one Pi.
> Network Limitations
> It's a straightforward process to set up a local AP for the Pi with the
> sugarizer-server running but if there is a need for Internet connectivity,
> then we'll have to set up an Ethernet bridge to make this possible which is
> also not very complicated.
> *UX*
> The setup process in a classroom should ideally just be connecting the Pi
> to a power supply.
> Minor UX features like an auto-redirect to sugarizer.org after connecting
> to the WiFi AP can be implemented.
> *If anyone from the community has any opinions or concerns about how any
> part of the School Box experience should be, then that’d be awesome.*
> Regards,
> Rishabh Nambiar.
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Walter Bender
Sugar Labs
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