[K12OSN] Re: Responses to the central office
Todd O'Bryan
toddobryan at mac.com
Wed Oct 25 20:12:04 UTC 2006
Daniel,
Are you with the people who got Atlanta to pilot the program in six
elementary schools and showed statistically significant performance
gains?
Todd
On Wed, 2006-10-25 at 15:45 -0400, Daniel Howard wrote:
> Hi Todd,
>
> We had to deal with this kind of resistance and more, and here's how we
> dealt with the various issues:
>
> 1. Keeping it off the district network: Fine, we found many classrooms
> had two independent Cat5 wires going to the room, so we used one for the
> district network to the teacher's PC (and any windows PCs required for
> special purposes) and the other one to feed the K12LTSP servers in each
> class. We fed the Internet to the K12LTSP servers via a business class
> cable modem (6-10 Mbps, $100/month) connected to Squidgard/Dansguardian
> firewall in IDF. Ultimately, the PTA paid $9000 to run 40 new Cat6
> ports from three switches, one to each room and some in hallways (for
> laptop carts), but finally the district acquiesced and said it would do
> a pilot of K12LTSP. The new wiring was timely, as they wanted to do a
> centralized server model, which requires Gbit/sec to each classroom. But
> if they hadn't agreed to the pilot, we could have had two independent
> networks, one for teachers and admin PCs fed by district Internet, and
> the other fed by cable modem to all the K12LTSP servers and student thin
> clients.
>
> 2. Concern for messing up teacher IP addresses: A district technician
> came in one day early on in our deployment and rewired a server and it
> began happily handing out IP addresses to the teacher's PCs, shutting
> off their Internet access. That was when the district finally realized
> that we had moved ahead with our deployment. Solution: hardcode the MAC
> addresses of each client to an IP address from each server. Then, even
> if miswired, the LTSP server can't give IP addresses to the win PCs.
>
> 3. Managing server/configuration: Linux allows secure login to manage
> each server from anywhere in the network. With Webmin, it's GUI and
> easy. And you can manage more Linux servers more effectively from a
> single location than with Windows.
>
> 4. Agree with previous posts on routers as commonplace in home and
> business networks now. Point out that his home Cable/DSL router is most
> likely running Linux.
>
> 5. Troubleshooting network problems caused by non-managed computers on
> the network can be incredibly difficult: Reality, from all of this
> groups' collective experience I'm sure, is that it is *easier* to
> manage, and the Linux computers *are* managed, but by built-in
> capabilities instead of purchased software. Built in Linux management
> capabilities exceed those of LANDesk currently, e.g., especially given
> that you can manage all those old Win 95/98 thin clients now, whereas
> you couldn't before using proprietary tools. Point out that the
> experience of others is that managing the K12LTSP servers has proved to
> be *significantly* less time consuming than Windows platforms.
>
> Regarding cost benefits, note the following:
>
> Thin clients running Open Source Software lower the total cost of
> ownership of technology for schools in the following ways:
>
> 1. Lower acquistion cost by at least 50%, typically more. Software
> cost is zero.
> 2. Lower operational cost via reduced electricity requirements: 1/5
> Wattage of normal PC, plus smaller form factor: you can fit twice the
> number of thin clients on the same table. Space and electricity were
> the final challenges we had at Brandon as we moved to a 2:1 classroom model.
> 4. Lower support cost: you only manage the servers, and one server
> can run up to 100 thin clients. Linux admin can manage more PCs than
> equivalent Windows admin.
> 5. Lower cost of retirement: thin clients weigh less than 1/5 of
> normal PCs and schools have to pay by the pound to have them hauled off.
>
> Plus, you can put dozens of modern educational software applications in
> front of your students for free, and can burn CDs with the software for
> the kids to take home and use there. Open Source Software is free to
> use and distribute as one desires. Figure out the cost of providing
> copies of MS office for every home with a PC, let alone Adobe Photoshop,
> a 3-D rendering package like the GIMP (doesn't exist, and by the way
> most Hollywood animation outfits have switched to Linux/GIMP), etc...
>
> Regards,
> Daniel
>
> --
> Daniel Howard
> President and CEO
> Georgia Open Source Education Foundation
>
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