On Fri, 11 Sep 2009, Dave Close wrote:

> I know you guys are discussing servers with hard disks, but what are
> your thoughts about systems without disks, so-called embedded systems?

Hi Dave.  I don't work with embedded systems.  I've been careful to make 
my recommendations for servers only.

Having said that I think that embedded systems would in general be running 
swapless for the reasons you mention.

> So, if you say that a system without any "swap" misbehaves, how does a
> system like this survive?

Linux can survive quite happily without swap as long as it doesn't run out 
of memory.  This should generally be true for any modern *nix I think. 
Older OSes would actually fall over if they did not have sufficient 
swap available.

An embedded system is far more deterministic than a general purpose 
server.  As such its memory requirements should be able to be estimated 
fairly accurately and sufficient ram can be allocated.

Thus I don't see this as being a problem for embedded systems - says the 
guy who doesn't play with them.

Cheers,

Rob

-- 
I tried to change the world but they had a no-return policy
http://www.practicalsysadmin.com
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