[Linux-cluster] Why kernelmodules?

[Lon Hohberger]

On Fri, 2006-11-10 at 10:32 +0100, Huesser Peter wrote:
> Hello
> 
>  
> 
> While comparing the redhat HA solution with linux HA
> (www.linux-ha.org) we remarked that linux HA does not make use of
> kernelmodules. What is the advantage off a kernel module solution over
> a non-kernelmodule solution. What things can not be done with a
> non-kernelmodule solution?

The main reason is that Linux-HA does not include a file system, so it
doesn't have (nor need) any kernel components.

In contrast, linux-cluster was built around a file system originally, so
there are parts which necessarily need to be in the kernel (namely GFS &
DLM).  CMAN was in the kernel in the RHEL4 branch, but now is in
userland (and plugs in to openais).

I guess you could port GFS to FUSE if you wanted... *scratches head*

-- Lon