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Re: [linux-lvm] Re: IBM to release LVM Technology to the Linux



On Thu, Jun 29, 2000 at 07:32:29AM +0200, Jean-Eric Cuendet wrote:
> 
> > Another thing to consider is that the LVMS Architecture is really a
> > framework.  It doesn't do much by itself.  The vast majority of the
> > functionality of an LVMS based on this architecture lies in 
> > the plug-in
> > modules that are loaded.  This is what allows this 
> 
> Where stands the VFS layer? Behind LVMS? Or is it just a plugin for LVMS? Or
> is it replaced?

VFS is above file systems, LVM/block devices are below.

The layering is roughly like this

        System calls  / NFS server 
                   VFS
                 Filesystems          (sometimes bypassed)
             Generic Page Cache       (sometimes bypassed)  
     	     LVM / Raid / LVMS
                 elevator 
     IDE driver / HW RAID driver / SCSI drivers 



 

-Andi


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