Re: [Server-devel] Help buying server for XS
Hi Guillermo, Omar. Glad to hear about more XO deployments in Colombia. Saludos desde Bogota. On Thu, Mar 24, 2011 at 2:35 PM, Reuben K. Caron wrote: > Guillermo, > > It would be also interesting to know what kind of user density you plan for > when deploying these APs, e.g. 50 XOs to 1 AP. > > Are these APs independent or run by a controller? > > What software are you using to perform your site surveys and RF heat maps? > > Regards, > > Reuben > > On Mar 19, 2011, at 6:53 PM, Guillermo Narvaez wrote: > > Hola Omar > > En nuestra implementacion usamos* IBM System X3200 M3* y no hemos tenido > problemas de rendimiento; lo que si deberias tener en cuenta es la capacidad > de almacenamiento del XS para los backup de las XO. Si van a usar todas las > features del XS te recomendaria como minimo 1TB de almacenamiento. > Con respecto a los AP seria muy util y practico usar AP que soporten PoE. > Nosotros usamos la version anterior de *3Com A-WA2110 Single Radio > 802.11a/b/g Access Point (JD446B)* > > Saludos! > > > > Guillermo Narvaez > > Servidores Escuela > Implementación OLPC | Programa Joaquin Victor Gonzalez > La Rioja - Argentina > > > > > 2011/3/18 Omar Andrés Zapata Mesa > > > > Hi all. > > I need buy a server for a school in colombia, and I have 2000 students in > the school to implement olpc project and install XS > > My question is, which server to buy for this number of students and > which wireless access points? > > Thanks! > > -- > > Omar Andres Zapata Mesa > > Head Developer Phenomenology of Fundamental Interactions Group (Gfif) > > http://gfif.udea.edu.co > > Division of computer science Gfif Developers (Gfif Dev) > > http://gfifdev.udea.edu.co > > Systems Engineering Student > > Universidad de Antioquia At Medellin - Colombia > > Usuario Linux #490962 > > > > ___ > > Server-devel mailing list > > Server-devel@lists.laptop.org > > http://lists.laptop.org/listinfo/server-devel > > > > > ___ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel > > > > ___ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel > > ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Help buying server for XS
Guillermo, It would be also interesting to know what kind of user density you plan for when deploying these APs, e.g. 50 XOs to 1 AP. Are these APs independent or run by a controller? What software are you using to perform your site surveys and RF heat maps? Regards, Reuben On Mar 19, 2011, at 6:53 PM, Guillermo Narvaez wrote: Hola Omar En nuestra implementacion usamos IBM System X3200 M3 y no hemos tenido problemas de rendimiento; lo que si deberias tener en cuenta es la capacidad de almacenamiento del XS para los backup de las XO. Si van a usar todas las features del XS te recomendaria como minimo 1TB de almacenamiento. Con respecto a los AP seria muy util y practico usar AP que soporten PoE. Nosotros usamos la version anterior de 3Com A-WA2110 Single Radio 802.11a/b/g Access Point (JD446B) Saludos! Guillermo Narvaez Servidores Escuela Implementación OLPC | Programa Joaquin Victor Gonzalez La Rioja - Argentina 2011/3/18 Omar Andrés Zapata Mesa > > Hi all. > I need buy a server for a school in colombia, and I have 2000 students in the school to implement olpc project and install XS > My question is, which server to buy for this number of students and which wireless access points? > Thanks! > -- > Omar Andres Zapata Mesa > Head Developer Phenomenology of Fundamental Interactions Group (Gfif) > http://gfif.udea.edu.co > Division of computer science Gfif Developers (Gfif Dev) > http://gfifdev.udea.edu.co > Systems Engineering Student > Universidad de Antioquia At Medellin - Colombia > Usuario Linux #490962 > > ___ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel > ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Help buying server for XS
Hola Omar! Guillermo's notes are good -- he is getting good results with that hardware. Some more info - Access Points tested with XO-1 and XO-1.5 http://wiki.laptop.org/go/Wireless_access_point_compatibility - Some recommended HW and notes on how to choose HW - also look at the server sizing section http://wiki.laptop.org/go/XS_Recommended_Hardware - In terms of numbers of access points, you need to plan a bit. We usually recommend 1 AP per 40 active users, you also have to consider the number of kids in a classroom, whether walls block RF or not, school layout, etc. cheers, m -- martin.langh...@gmail.com mar...@laptop.org -- Software Architect - OLPC - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] Network Backup of Journal Video Items
Hi Sebastian, can you tell us a bit more? You be recording with XO-1 units... using Record in Sugar? What version of Sugar and Record? Or you'll use gstreamer directly to the server? One possibility would be to write to an NFS share -- but 'realtime' recording of videos over wlan is tricky and likely to fail. The wlan connection can easily get interference from external sources or just contention (from too many users on the same AP or frequency). If it's possible, recording locally and then having a backup or explicit upload/copy is the most reliable method. Local recording on an XO-1 is limited by the JFFS2 storage -- if you are prepared to use something other than standard Record, you may be able to capture at high resolution and store without compression (or with minimal compression) writing straight to a fast USB Flash storage, or an SD card. This will give you the best starting quality -- which you'll need as you're intending to use this for a documentary. cheers, m -- martin.langh...@gmail.com mar...@laptop.org -- Software Architect - OLPC - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
