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XS: OLPC School Server

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XS: OLPC School Server. Internet in a box.

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XS: OLPC School Server

  1. 1. XS: OLPC School Server The Internet in a Box (unsung hero too!) Sameer Verma, Ph.D. Associate Professor Information Systems Department Presentation: OLPC San Francisco Bay Area San Francisco State University http://tinyurl.com/olpcsf Unless noted otherwise San Francisco, CA 94132 USA
  2. 2. Multiple hats... Disclaimer: I do not work for OLPC. I am only a volunteer!
  3. 3. OLPC San Francisco Bay Area http://wiki.laptop.org/go/OLPC_SanFranciscoBayArea sf http://lists.laptop.org/listinfo/olpc-sf m/ olpc yurl . co in t p: //t ht
  4. 4. OLPC-SF Deployments ● A hub for exchange of ideas, plans, content, etc. ● Deployments – Afghanistan (Carol Ruth Silver, MTSA) – India (Humaira Mahi & Sameer Verma, SFSU) – Jamaica (Sameer Verma & Univ. of the West Indies) – Madagascar (June Kleider, XO-ology) – Senegal (Drew & Lick-Wilmerding Schools) – South Africa (EduWeavers) – San Francisco (Starr King Elementary) – Uganda (UC Berkeley)
  5. 5. School environment Manage content Manage access Manage assessment have to good
  6. 6. What does the XS look like? Fantasy View
  7. 7. What does the XS look like? Reality View http://www.flickr.com/photos/popcorncx/149706221/
  8. 8. What does the XS look like? ● Any x86 box with requisite memory, crunch and storage can be the XS. – It could also be a ARM machine in the near future... ● Ideally, we want a machine that – Consumes very little power – Has the necessary crunch – Portable ● Pocketable, even? – Very forgiving for power brownouts, heat, dust, etc. ● Kinda like the XO.
  9. 9. Services that the XS runs ● Networking – DNS – DHCP – NAT/Masquerading – Bridging ● Identity management – Seamless XO login – Single One Time Password (SOTP) on server ● Activation – Theft deterrence
  10. 10. Services that the XS runs ● Collaboration – XMPP via ejabberd ● Storage – Files and attachments for courses – Backup files – Other media ● Backup – Journal/Datastore backup ● XO Software updates – Push updates including firmware and OS images ● Activity server – Pushing activity bundles
  11. 11. Networking ● Provides networking infrastructure for the school. ● Acts as an Internet gateway (if backhaul exists) – Includes HTTP proxy (optional) – Content filter (optional) ● Supports Wi-Fi: – Ad-Hoc – Mesh (IEEE 802.11s draft) – Infrastructure (Access Point)
  12. 12. Identity management ● Single One Time Passwords (SOTP) for maintenance. – Remote ISP maintenance, etc. ● OLPC XO Browse – authenticates seamlessly with Moodle – Moodle talks to ejabberd for permissions, etc. ● First XO to access Moodle – This XO becomes admin. – This XO can assign other teachers, course creators, and other such roles
  13. 13. Collaboration ● XMPP-based collaboration via ejabberd. – Ejabberd is a XMPP (jabber) server written in erlang. ● Uses gabble mode under telepathy in Sugar. – Gabble allows for server-based collaboration ● XOs switch to salut mode in case no XS is found. – Salut allows for peer-to-peer collaboration ● Activities such as Chat, Write, Memorize use XMPP to collaborate. http://xmpp.org/ http://collabora.co.uk http://en.wikipedia.org/wiki/Telepathy_software
  14. 14. Storage ● Much of the storage lives in /library partition. – Mount /library on external USB disk or other media and expand storage. – Run rest of the system off a CF or SD card (solid state) ● Files can be served as – links via Moodle – links via Apache (add Apache config)
  15. 15. Backup ● Three processes: – Traffic control ● provides basic "traffic control" to manage load. – Backup-complete script ● Creates links for latest snapshot. – Daily cleanup ● enforces a per-user "soft" quota.
  16. 16. Updates ● Pushing updates to OS image and firmware via rsync.
  17. 17. Layout (Access Points)
  18. 18. Hardware recommendations ● Schools with less than 40 laptops: – use XS-on-XO: http://wiki.laptop.org/go/XS-on-XO – Requires a SD card (4GB, preferably class 6) – External USB hard drive (may need own power) – USB-Ethernet for backhaul.
  19. 19. Fit PC and Fit PC2 ● Fit PC works well and is comparable to the XO-1 in performance. – More configurable than the XO-1. – Replace a SSD in the FitPC to make it cooler and more power efficient. ● http://www.fit-pc.com/fit-pc1/ ● Fit PC2 has heat problems. – Intel Atom runs too hot ● Surprise, surprise. ● Maybe glue on a large heat sink? http://www.flickr.com/photos/ndevil/3535934684/
  20. 20. Hardware recommendations ● Schools with up to 100 laptops: – 1GHz CPU, 1GB RAM, – at least 2GB disk storage per laptop. – Something in the mini ITX form-factor works well. – Fanless units are better
  21. 21. Hardware recommendations ● For up to 500 laptops: – dual-core 2GHz CPU – 2 to 4GB RAM – at least 2GB disk storage per laptop. – This type of a machine usually works in environments with good power resources. http://www.flickr.com/photos/popcorncx/149706221/
  22. 22. Hardware recommendations ● More than 500 laptops – Server-class dual CPU – 4 to 16GB RAM – at least 2GB disk storage per laptop. – Data center hosting is also an option. http://www.flickr.com/photos/jamisonjudd/2433102356/
  23. 23. School Server
  24. 24. Screenshots XS Moodle Screen Shots
  25. 25. Main page
  26. 26. Front page settings
  27. 27. Front page roles
  28. 28. List of users
  29. 29. Roles and permissions
  30. 30. Presence service
  31. 31. Antitheft controls
  32. 32. Add a course
  33. 33. Site files
  34. 34. Question bank
  35. 35. Moving courses Create in San Francisco... ...deploy in Madagascar! A zip file, which includes content and structure for the entire course!
  36. 36. XS: Internet in a box No Internet? No power? No problem :-) http://en.wikipedia.org/wiki/OLPC_XS http://wiki.laptop.org/go/School_server
  37. 37. OLPC San Francisco Bay Area http://wiki.laptop.org/go/OLPC_SanFranciscoBayArea sf http://lists.laptop.org/listinfo/olpc-sf m/ olpc yurl . co in t p: //t ht
  38. 38. Made with the free stuff Its your intellectual property. Keep it open. Vote with your fingers. Use open formats! http://www.openoffice.org/