[Sugar-devel] Impact of the Sugarizer School Box | Rishabh Nambiar |
rishabhn at protonmail.com
Sat Mar 3 15:51:33 EST 2018
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 :)
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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).
> 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:
>> 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.
>> 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.
>> 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.
>> Rishabh Nambiar.
>> Sugar-devel mailing list
>> Sugar-devel at lists.sugarlabs.org
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