[Freedombox-discuss] A software architecture for the FreedomBox

Jonas Smedegaard dr at jones.dk
Wed Apr 13 16:20:58 UTC 2011

On 11-04-13 at 05:49pm, Eugen Leitl wrote:
> On Wed, Apr 13, 2011 at 05:06:23PM +0200, Rob van der Hoeven wrote:
> > One of the first things you have to do when building a system like 
> > the FreedomBox is figure out the software architecture. I have come 
> > up with an interesting architecture that is made of Linux Containers 
> > (Virtual
> Using Linux vserver guests for service separation (jails on steroids) 
> is an excellent idea, actually.

I find it interesting, but am sceptical: I believe each jail consume 
separate memory for their libraries - i.e. cannot benefit from shared 
libraries.  So I worry about memory consumption.

On a related note I want to keep low the number of used library 
environments - e.g. try to aim for...

  * only one of libssl or gnutls
  * fewest possible of Python, Perl, Bash, Ruby, PHP

...especially for things running as daemons, but also for e.g. 
cron-triggered scripts, as even temporary required memory might not be 

I notice the test system uses swap.  That is bad if using internal flash 
disks as they wear much faster that way, and swapping onto an external 
harddisk is not user-friendly: Treating it as hot-plug then not only 
risk roccupting the data files potentially being in the middle of a 
transaction but crashes the whole system!

 - Jonas

 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

 [x] quote me freely  [ ] ask before reusing  [ ] keep private
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