Re: [dm-devel] Device Mapper as a cache for SAN?

[Ed Wilts <ewilts ewilts org>]

On Mon, Apr 10, 2006 at 12:58:36PM -0500, Eric Van Hensbergen wrote:
> It seems like device-mapper would allow a fairly straightforward
> implementation of a local-disk cache for a SAN (iSCSI, AOE, etc.).  
> The dm-raid1 and dm-mpath modules seem to have elements of overlap,
> but its not clear if there's a straightforward way to implement a
> local-disk block cache using existing modules, or whether a new one is
> needed.  Has anyone looked at this before?

The obvious question is why?  What would this provide that the kernel
and file systems don't already provide?

        .../Ed

-- 
Ed Wilts, RHCE
Mounds View, MN, USA
mailto:ewilts ewilts org
Member #1, Red Hat Community Ambassador Program