Re: clustered MD

[Goldwyn Rodrigues]

On 06/10/2015 03:00 AM, Richard Weinberger wrote:
> On Wed, Jun 10, 2015 at 5:33 AM, Goldwyn Rodrigues <rgoldwyn@xxxxxxxx> wrote:
> > David Lang has already responded: The idea is to use a RAID device
> > (currently only level 1 mirroring is supported) with multiple nodes of the
> > cluster.
> >
> > Here is a description on how to use it:
> > http://marc.info/?l=linux-raid&m=141935561418770&w=2
>
> Sorry if this is a stupid question, but how does this compare to DRBD?

No, it is not.

DRBD is for local devices synced over the network. Cluster-md is for 
shared devices such as SAN, so all syncs happen over the FC.
DRBD works for two nodes (until recently), cluster-md works for multiple 
nodes.

--
Goldwyn
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